Question

In: Statistics and Probability

1.The cholesterol levels of a random sample of 100 men are measured. The sample mean is...

1.The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 95% confidence interval for the population mean?

A.188 ± (1.96)(40)

B.188 ± (1.96)(4)

C.188 ± (1.96)(400)

D.188 ± (1.96)(0.4)  

2.The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 99% confidence interval for the population mean?

A.188 ± (2.58)(0.4)

B.188 ± (2.58)(40)

C.188 ± (2.58)(4)

D.188 ± (2.58)(400)

3.The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 90% confidence interval for the population mean?

Question 3 options:

A.188 ± (1.64)(40)

B.188 ± (1.64)(400)

C.188 ± (1.64)(4)

D.188 ± (1.64)(0.4)

4.)If a significance test gives a P-value of 0.004,

A.we do not have good evidence against the null hypothesis.

B.we do have good evidence against the null hypothesis.

C.the null hypothesis is very likely to be true.

D.the margin of error is 0.50.

5.)If a significance test gives P-value 0.65,

Question 5 options:

Question 5 options:

A.we do have good evidence against the null hypothesis.

B.the null hypothesis is very likely to be true.

C.we do not have good evidence against the null hypothesis.

D.the margin of error is 0.005.

Solutions

Expert Solution

Solution:

1. The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 95% confidence interval for the population mean?

Answer: B.188 ± (1.96)(4)

Explanation:

2.The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 99% confidence interval for the population mean?

Answer: C.188 ± (2.58)(4)

Explanation:

3.The cholesterol levels of a random sample of 100 men are measured. The sample mean is 188 and the sample standard deviation is 40. Which of the following provides a 90% confidence interval for the population mean?

Answer: C.188 ± (1.64)(4)

Explanation:

4.)If a significance test gives a P-value of 0.004,

Answer: B.we do have good evidence against the null hypothesis.

5.)If a significance test gives P-value 0.65,

Answer: C.we do not have good evidence against the null hypothesis.

orchestra answered 1 year ago
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