Question

The National Center for Health Statistics reports that the mean systolic blood pressure for males 35 to 44 years of age is 128 with a standard deviation 15.20. The medical director of a large company looks at the medical records of 72 executives in this age group and finds that the mean systolic blood pressure in this sample is x? = 126.10 . They want to know if this is evidence that the company's executives have a different mean blood pressure from the general population. Enter the answers to the questions below in the same order. FORMAT: For the first three questions, round final answers to two decimal places. State all probabilities as a proportion (e.g., 0.10). (a) Find the standard error of the distribution of sample means if the null hypothesis is true. (b) Find the z-value for the sample mean of x? = 126.10 (c) State the probability of obtaining a sample with a mean of x? = 126.10 from the population of men 35 to 44 years of age with ? = 128 (assuming the null hypothesis is true). (d) Based on the answer to (c), can you say that the company's executives have a different mean blood pressure from the general population? Explain why or why not.

          The National Center for Health Statistics reports that the mean systolic blood
pressure for males 35 to 44 years of age is 128 with a standard deviation 15.20. The
medical director of a large company looks at the medical records of 72 executives in
this age group and finds that the mean systolic blood pressure in this sample is x? =
126.10 .
They want to know if this is evidence that the company's executives have a different
mean blood pressure from the general population.

Enter the answers to the questions below in the same order.
FORMAT: For the first three questions, round final answers to two decimal places.
State all probabilities as a proportion (e.g., 0.10).

(a) Find the standard error of the distribution of sample means if the null hypothesis
is true.

(b) Find the z-value for the sample mean of x? = 126.10

(c) State the probability of obtaining a sample with a mean of x? = 126.10 from the
population of men 35 to 44 years of age with ? = 128 (assuming the null hypothesis
is true).

(d) Based on the answer to (c), can you say that the company's executives have a
different mean blood pressure from the general population? Explain why or why
not.

The National Center for Health Statistics reports that the mean systolic blood
pressure for males 35 to 44 years of age is 128 with a standard deviation 15.20. The
medical director of a large company looks at the medical records of 72 executives in
this age group and finds that the mean systolic blood pressure in this sample is x? =
126.10 .
They want to know if this is evidence that the company's executives have a different
mean blood pressure from the general population.

Enter the answers to the questions below in the same order.
FORMAT: For the first three questions, round final answers to two decimal places.
State all probabilities as a proportion (e.g., 0.10).

(a) Find the standard error of the distribution of sample means if the null hypothesis
is true.

(b) Find the z-value for the sample mean of x? = 126.10

(c) State the probability of obtaining a sample with a mean of x? = 126.10 from the
population of men 35 to 44 years of age with ? = 128 (assuming the null hypothesis
is true).

(d) Based on the answer to (c), can you say that the company's executives have a
different mean blood pressure from the general population? Explain why or why
not.

Added by Stephen M.

Question

Please give Ace some feedback