Physics : asked on cgarcia04
 21.04.2023

I don’t get it at all, I want to know the answer

. 4

Faq

Mathematics
Step-by-step answer
P Answered by PhD

A) Null hypothesis;H0: μ ≥ 7

Alternative Hypothesis;Ha: μ < 7

B) t ≈ -1.75

C) 0.025 ≤ p-value < 0.05

D) Do not reject H0 since the p-value is greater than α

E) There is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.

Step-by-step explanation:

We are given;

Population mean;μ = 7

Sample mean; x' = 6.7

Sample Standard deviation; s = 2.1

Level of significance; α = 0.01

Sample size; n = 150

A) Now, the hypotheses can be stated as;

Null hypothesis;H0: μ ≥ 7

Alternative Hypothesis;Ha: μ < 7

B) The test statistic will be calculated from the formula;

t = (x' - μ)/(s/√n)

Plugging in the relevant values, we have;

t = (6.7 - 7)/(2.1/√150)

t = -0.3/0.1715

t = -1.7493

t ≈ -1.75

C) From online p-value from t-score calculator attached using t-score of -1.75; DF = 150 - 1 = 149; significance level of 0.01 and one tail, we have;

The p-value = 0.041088

The closest answer among the options is;

0.025 ≤ p-value < 0.05

D) Since the p-value is greater than the significance level of 0.01, thus we will fail to reject the null hypothesis

E) From D above, we will conclude that there is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.


According to the Centers for Disease Control and Prevention (February 18, 2016), 1 in 3 American adu
Mathematics
Step-by-step answer
P Answered by PhD

A) Null hypothesis;H0: μ ≥ 7

Alternative Hypothesis;Ha: μ < 7

B) t ≈ -1.75

C) 0.025 ≤ p-value < 0.05

D) Do not reject H0 since the p-value is greater than α

E) There is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.

Step-by-step explanation:

We are given;

Population mean;μ = 7

Sample mean; x' = 6.7

Sample Standard deviation; s = 2.1

Level of significance; α = 0.01

Sample size; n = 150

A) Now, the hypotheses can be stated as;

Null hypothesis;H0: μ ≥ 7

Alternative Hypothesis;Ha: μ < 7

B) The test statistic will be calculated from the formula;

t = (x' - μ)/(s/√n)

Plugging in the relevant values, we have;

t = (6.7 - 7)/(2.1/√150)

t = -0.3/0.1715

t = -1.7493

t ≈ -1.75

C) From online p-value from t-score calculator attached using t-score of -1.75; DF = 150 - 1 = 149; significance level of 0.01 and one tail, we have;

The p-value = 0.041088

The closest answer among the options is;

0.025 ≤ p-value < 0.05

D) Since the p-value is greater than the significance level of 0.01, thus we will fail to reject the null hypothesis

E) From D above, we will conclude that there is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.


According to the Centers for Disease Control and Prevention (February 18, 2016), 1 in 3 American adu
English
Step-by-step answer
P Answered by PhD

The statement that best states the theme of the story “A Walk in My Shoes” is that you understand others better when you experience what they do.

Here, the option C. is the correct option.

Explanation:

In this excerpt, two brothers are introduced to us – Emerson and Ennis Bentley. Both are of opposite natures. Neither can understand each other and often think about each other that how can they do what they are doing. Ennis wonders how Emerson can stay glued to his compute all day. Emerson wonders how Ennis can be so friendly and playful all the time. To understand each other in a better way, Ennis suggests Emerson one day to switch places with each other. It is only by putting oneself in another’s shoes can one really understand another. That’s why Option C fits well with the storyline.

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