History: Can you answer question number 4 for me

Step-by-step explanation: Answer 4 :Freedom of Expression:- Citizens have the right to freely express...

Can you answer question number 4 for me, №18054451, 14.06.2021 23:39

Mathematics

Suppose you take a 30-question, multiple-choice test, in which each question contains 4 choices: A, B, C, and D. If you randomly guess on all 30 questions, what is the probability you pass the exam (correctly guess on 60% or more of the questions)? Assume none of the questions have more than one correct answer (hint: this assumption of only 1 correct choice out of 4 makes the distribution of X, the number of correct guesses, binomial). What is the expected number of correct guesses, from problem #19? What is the standard deviation, ? (Remember

Step-by-step answer

P Answered by PhD

(a) The probability you pass the exam is 0.0000501.

(b) The expected number of correct guesses is 7.5.

(c) The standard deviation is 2.372.

Step-by-step explanation:

We are given that you take a 30-question, multiple-choice test, in which each question contains 4 choices: A, B, C, and D. And you randomly guess on all 30 questions.

Since there is an assumption of only 1 correct choice out of 4 which means the above situation can be represented through binomial distribution;

$P(X =x) = \binom{n}{r}\times p^{r}\times (1-p)^{n-r} ; x = 0,1,2,3,......$

where, n = number of trials (samples) taken = 30

r = number of success = at least 60%

p = probbaility of success which in our question is the probability

of a correct answer, i.e; p = $\frac{1}{4}$ = 0.25

Let X = Number of questions that are correct

So, X ~ Binom(n = 30 , p = 0.25)

(a) The probability you pass the exam is given by = P(X $\geq$ 18)

Because 60% of 30 = 18

P(X $\geq$ 18) = P(X = 18) + P(X = 19) +...........+ P(X = 29) + P(X = 30)

= $\binom{30}{18}\times 0.25^{18}\times (1-0.25)^{30-18} + \binom{30}{19}\times 0.25^{19}\times (1-0.25)^{30-19} +.......+ \binom{30}{29}\times 0.25^{29}\times (1-0.25)^{30-29} + \binom{30}{30}\times 0.25^{30}\times (1-0.25)^{30-30}$

= 0.0000501

(b) The expected number of correct guesses is given by;

Mean of the binomial distribution, E(X) = $n \times p$

= $30 \times 0.25$ = 7.5

(c) The standard deviation of the binomial distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{30 \times 0.25 \times (1-0.25)}$

= $\sqrt{5.625}$ = 2.372

Mathematics

21/4 ÷6. question 1 4 1/2 ÷6. question 2 4 2/4 ÷6. question 3 3 1/4 ÷6. question 4 4 1/2÷6. question5 5 1/3 ÷6. question6 1 5/6 ÷6. question7 5 1/3÷6. question8 3 ÷6. question9

Step-by-step answer

P Answered by PhD

4

1) 3/8

2) 3/4

3) 3/4

4) 13/24

5) 3/4

6) 8/9

7) 11/36

8) 8/9

9) 1/2

Step-by-step explanation:

1) 2 1/4 ÷ 6 = (2×4+1)/4 ÷ 6 = 9/4 × 1/6 = 3/8

2) 4 1/2 ÷ 6 = (4×2+1)/2 ÷ 6 = 9/2 × 1/6 = 3/4

3) 4 2/4 ÷ 6 = (4×4+2)/4 ÷ 6 = 18/4 × 1/6 = 3/4

4) 3 1/4 ÷ 6 = (3×4+1)/4 ÷ 6 = 13/4 × 1/6 = 13/24

5) 4 1/2 ÷ 6 = (4×2+1)/2 ÷ 6 = 9/2 × 1/6 = 3/4

6) 5 1/3 ÷ 6 = (5×3+1)/3 ÷ 6 = 16/3 × 1/6 = 8/9

7) 1 5/6 ÷ 6 = (1×6+5)/6 ÷ 6 = 11/6 × 1/6 = 11/36

8) 5 1/3 ÷ 6 = (5×3+1)/3 ÷ 6 = 16/3 × 1/6 = 8/9

9) 3 ÷ 6 = 3 × 1/6 = 1/2

Mathematics

21/4 ÷6. question 1 4 1/2 ÷6. question 2 4 2/4 ÷6. question 3 3 1/4 ÷6. question 4 4 1/2÷6. question5 5 1/3 ÷6. question6 1 5/6 ÷6. question7 5 1/3÷6. question8 3 ÷6. question9

Step-by-step answer

P Answered by PhD

4

1) 3/8

2) 3/4

3) 3/4

4) 13/24

5) 3/4

6) 8/9

7) 11/36

8) 8/9

9) 1/2

Step-by-step explanation:

1) 2 1/4 ÷ 6 = (2×4+1)/4 ÷ 6 = 9/4 × 1/6 = 3/8

2) 4 1/2 ÷ 6 = (4×2+1)/2 ÷ 6 = 9/2 × 1/6 = 3/4

3) 4 2/4 ÷ 6 = (4×4+2)/4 ÷ 6 = 18/4 × 1/6 = 3/4

4) 3 1/4 ÷ 6 = (3×4+1)/4 ÷ 6 = 13/4 × 1/6 = 13/24

5) 4 1/2 ÷ 6 = (4×2+1)/2 ÷ 6 = 9/2 × 1/6 = 3/4

6) 5 1/3 ÷ 6 = (5×3+1)/3 ÷ 6 = 16/3 × 1/6 = 8/9

7) 1 5/6 ÷ 6 = (1×6+5)/6 ÷ 6 = 11/6 × 1/6 = 11/36

8) 5 1/3 ÷ 6 = (5×3+1)/3 ÷ 6 = 16/3 × 1/6 = 8/9

9) 3 ÷ 6 = 3 × 1/6 = 1/2

Mathematics

Suppose you take a 30-question, multiple-choice test, in which each question contains 4 choices: A, B, C, and D. If you randomly guess on all 30 questions, what is the probability you pass the exam (correctly guess on 60% or more of the questions)? Assume none of the questions have more than one correct answer (hint: this assumption of only 1 correct choice out of 4 makes the distribution of X, the number of correct guesses, binomial). What is the expected number of correct guesses, from problem #19? What is the standard deviation, ? (Remember

Step-by-step answer

P Answered by PhD

(a) The probability you pass the exam is 0.0000501.

(b) The expected number of correct guesses is 7.5.

(c) The standard deviation is 2.372.

Step-by-step explanation:

We are given that you take a 30-question, multiple-choice test, in which each question contains 4 choices: A, B, C, and D. And you randomly guess on all 30 questions.

Since there is an assumption of only 1 correct choice out of 4 which means the above situation can be represented through binomial distribution;

$P(X =x) = \binom{n}{r}\times p^{r}\times (1-p)^{n-r} ; x = 0,1,2,3,......$

where, n = number of trials (samples) taken = 30

r = number of success = at least 60%

p = probbaility of success which in our question is the probability

of a correct answer, i.e; p = $\frac{1}{4}$ = 0.25

Let X = Number of questions that are correct

So, X ~ Binom(n = 30 , p = 0.25)

(a) The probability you pass the exam is given by = P(X $\geq$ 18)

Because 60% of 30 = 18

P(X $\geq$ 18) = P(X = 18) + P(X = 19) +...........+ P(X = 29) + P(X = 30)

= $\binom{30}{18}\times 0.25^{18}\times (1-0.25)^{30-18} + \binom{30}{19}\times 0.25^{19}\times (1-0.25)^{30-19} +.......+ \binom{30}{29}\times 0.25^{29}\times (1-0.25)^{30-29} + \binom{30}{30}\times 0.25^{30}\times (1-0.25)^{30-30}$

= 0.0000501

(b) The expected number of correct guesses is given by;

Mean of the binomial distribution, E(X) = $n \times p$

= $30 \times 0.25$ = 7.5

(c) The standard deviation of the binomial distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{30 \times 0.25 \times (1-0.25)}$

= $\sqrt{5.625}$ = 2.372

Mathematics

Astate end-of-grade exam in american history is a multiple-choice test that has 50 questions with 4 answer choices for each question. a student must get at least 25 correct to pass the test, and the questions are very difficult. question 1. if a student guesses on every question, what is the probability the student will pass? (round your answer to 4 decimal places). question 2. suppose, after studying, a student raises her chances of getting each question correct to 0.70. what is the probability that she will pass? (round your answer to 4 decimal

Step-by-step answer

P Answered by PhD

Q1) The student has a 0.01% probability of passing the test.

Q2) She has a 99.91% probability of passing in the test.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either he gets it correct, or he gets it wrong. So we solve this problem using the binomial probability distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And $\pi$ is the probability of X happening.

For this problem, we have that:

Question 1.

There are 50 questions, so n = 50 .

The student is going to guess each question, so he has a $\pi = \frac{1}{4} = 0.25$ probability of getting it right.

He needs to get at least 25 question right.

So we need to find $P(X \geq 25)$ .

Using a binomial probability calculator, with n = 50 and $\pi = 0.25$ we get that $P(X \geq 25) = 0.0001$ .

This means that the student has a 0.01% probability of passing the test.

Question 2.

Now, we need to find $P(X \geq 25)$ with $\pi = 0.70$ . So $P(X \geq 25) = 0.9991$

She has a 99.91% probability of passing in the test.

Mathematics

A 20-question math test is worth 100 points.Multiple choice questions worth 4 points each.Bubble grid questions are worth 8 points each.How many of each type of question is on the test?

Step-by-step answer

P Answered by PhD

There are 5 8-point questions and 15 4-point questions

Step-by-step explanation:

20.4= max points 80 limit of points = 100

20.8= max points 160

100:4= max 25 questions limit of questions = 20

100:8= max 12,5 question

5.8=40

15.4=60

French

Comment dit-on “the ankle” en français? le genou la cheville le cou la jambe flag this question question 7 4.5 pts comment dit-on “a shot” en français? la piqûre le rhume les médicaments l’ordonnance flag this question question 8 4.5 pts finis la phrase: “si tu cours pendant 5 heures, “ tu as mal aux yeux tu as mal aux joues tu as mal à la gorge tu as mal aux jambes flag this question question 9 4.5 pts c’est un sport d’été que l’on fait sur l’eau. qu’est-ce que c’est? le baseball le patinage la voile le foot flag this question question 10 4.5

Step-by-step answer

P Answered by PhD

La cheville = the ankle

La piqûre = a shot

Si tu cours pendant 5 heures, t'as mal aux jambes! = When you run for 5 hrs. your legs hurt.

La voile = Sailing

La fête = The party

Nous avons mal au genou. = Our knees hurt.

T'as mal au dos? = Does your back hurt?

Il a mis son manteau.

Il a bu du lait.

Il n'a pas fait les courses.

39°C = normal temperature is 37.5 degrees Celsius for most people.

Il y a beaucoup d’homéopathes en France = faux

La crose est au sud-est de la France.

Napoleon Bonaparte was born on August 15, 1769, in Ajaccio, on the Mediterranean island of Corsica.

Le docteur : Ah ! Voici ma patiente préférée. Bonjour, Mélanie! Qu'est-ce qui se passe?

Mélanie : Je ne me sens pas bien : je tousse beaucoup, j'éternue et mon nez coule. Je me mouche toute la journée. J'utilise au moins dix paquets de mouchoirs par jour.

Le docteur : Allongez-vous, je vais prendre votre tension… 11,2 : elle est normale. Vous avez mal à la tête?

Mélanie : Oui.

Le docteur : Vous avez de la fièvre?

Mélanie : Oui. J'ai 38,7 de température.

Le docteur :Vous avez des courbatures?

Mélanie : Non, je ne crois pas.

Le docteur : Vous êtes en contact avec des personnes malades?

Mélanie : Mon amie a la grippe mais elle reste chez elle.

Le docteur : Bon. Vous avez un bon rhume. Vous prendrez des médicaments : un cachet d'aspirine trois fois par jour et une cuillerée de sirop matin, midi et soir. J'ajoute des gouttes à mettre dans le nez quand il est bouché. Voici votre ordonnance.

Mélanie : Merci, Docteur. Combien coûte la consultation?

Le docteur : 20 euros, s'il vous plaît. Au revoir, Mélanie.

Mélanie : D'accord. Au revoir, Docteur!

Explanation:

English

Use the state parks hope to tempt kids into nature, not nintendo article for questions 1-4 which excerpt from the article illustrates why involving kids in parks might be in the parks best interest ? question 1 options: many had never left their neighborhoods, and it was the first time they had seen the atlantic ocean or been camping, said settina, the park service chief. attendance at state parks is up, but their budgets have been hit hard since the recession in 2008. their costs have gone up, but funding from state legislatures has dropped in

Step-by-step answer

P Answered by PhD

1

Answer:

1. "If our future leaders have no relationship to nature, no understanding of how clean air and clean water are produced and what a healthy environment is, they won't have the knowledge, nor will they care about, doing anything about the stewardship of the Earth," said Nita Settina of the Maryland Park Service.

This excerpt identifies children as the future leaders of the country. It states that if children visit parks, they will care about nature, and about keeping it clean and beautiful. Therefore, parks would benefit in the future from children visiting them.

2. Paragraph 2 - Many parks have...

3. by providing quotes and examples of programs that illustrate the goals of the park service.

In this text, the author wants to develop the central idea that it is important to take children to parks and to allow them to spend time in nature. The way the author develops this idea is by providing quotes and examples of various programs that educate what the goals of the park service are.

4. The statistics about the number of parks and annual visitors.

Because the main idea of the paragraph is the relationship between children learning about nature and spending time in parks, and the future well-being of parks, the information that is the least important in the excerpt are the statistics about the number of parks and annual visitors.

French

Comment dit-on “the ankle” en français? le genou la cheville le cou la jambe flag this question question 7 4.5 pts comment dit-on “a shot” en français? la piqûre le rhume les médicaments l’ordonnance flag this question question 8 4.5 pts finis la phrase: “si tu cours pendant 5 heures, “ tu as mal aux yeux tu as mal aux joues tu as mal à la gorge tu as mal aux jambes flag this question question 9 4.5 pts c’est un sport d’été que l’on fait sur l’eau. qu’est-ce que c’est? le baseball le patinage la voile le foot flag this question question 10 4.5

Step-by-step answer

P Answered by PhD

La cheville = the ankle

La piqûre = a shot

Si tu cours pendant 5 heures, t'as mal aux jambes! = When you run for 5 hrs. your legs hurt.

La voile = Sailing

La fête = The party

Nous avons mal au genou. = Our knees hurt.

T'as mal au dos? = Does your back hurt?

Il a mis son manteau.

Il a bu du lait.

Il n'a pas fait les courses.

39°C = normal temperature is 37.5 degrees Celsius for most people.

Il y a beaucoup d’homéopathes en France = faux

La crose est au sud-est de la France.

Napoleon Bonaparte was born on August 15, 1769, in Ajaccio, on the Mediterranean island of Corsica.

Le docteur : Ah ! Voici ma patiente préférée. Bonjour, Mélanie! Qu'est-ce qui se passe?

Mélanie : Je ne me sens pas bien : je tousse beaucoup, j'éternue et mon nez coule. Je me mouche toute la journée. J'utilise au moins dix paquets de mouchoirs par jour.

Le docteur : Allongez-vous, je vais prendre votre tension… 11,2 : elle est normale. Vous avez mal à la tête?

Mélanie : Oui.

Le docteur : Vous avez de la fièvre?

Mélanie : Oui. J'ai 38,7 de température.

Le docteur :Vous avez des courbatures?

Mélanie : Non, je ne crois pas.

Le docteur : Vous êtes en contact avec des personnes malades?

Mélanie : Mon amie a la grippe mais elle reste chez elle.

Le docteur : Bon. Vous avez un bon rhume. Vous prendrez des médicaments : un cachet d'aspirine trois fois par jour et une cuillerée de sirop matin, midi et soir. J'ajoute des gouttes à mettre dans le nez quand il est bouché. Voici votre ordonnance.

Mélanie : Merci, Docteur. Combien coûte la consultation?

Le docteur : 20 euros, s'il vous plaît. Au revoir, Mélanie.

Mélanie : D'accord. Au revoir, Docteur!

Explanation:

English

Use the state parks hope to tempt kids into nature, not nintendo article for questions 1-4 which excerpt from the article illustrates why involving kids in parks might be in the parks best interest ? question 1 options: many had never left their neighborhoods, and it was the first time they had seen the atlantic ocean or been camping, said settina, the park service chief. attendance at state parks is up, but their budgets have been hit hard since the recession in 2008. their costs have gone up, but funding from state legislatures has dropped in

Step-by-step answer

P Answered by PhD

1

Answer:

1. "If our future leaders have no relationship to nature, no understanding of how clean air and clean water are produced and what a healthy environment is, they won't have the knowledge, nor will they care about, doing anything about the stewardship of the Earth," said Nita Settina of the Maryland Park Service.

This excerpt identifies children as the future leaders of the country. It states that if children visit parks, they will care about nature, and about keeping it clean and beautiful. Therefore, parks would benefit in the future from children visiting them.

2. Paragraph 2 - Many parks have...

3. by providing quotes and examples of programs that illustrate the goals of the park service.

In this text, the author wants to develop the central idea that it is important to take children to parks and to allow them to spend time in nature. The way the author develops this idea is by providing quotes and examples of various programs that educate what the goals of the park service are.

4. The statistics about the number of parks and annual visitors.

Because the main idea of the paragraph is the relationship between children learning about nature and spending time in parks, and the future well-being of parks, the information that is the least important in the excerpt are the statistics about the number of parks and annual visitors.

Can you answer question number 4 for me

Step-by-step answer

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