1) In a study of 792 randomly selected medical malpractice lawsuits, it was found that 514 of them were dropped or dismissed. Use a 0.05 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed.

Which of the following is the hypothesis test to be conducted?

A.H0:p<0.5

H1:p=0.5

B.H0:p=0.5

H1:p>0.5

C.H0:p0.5

H1:p=0.5

D. H0:p>0.5

H1:p=0.5

E. H0:p=0.5

H1:p0.5

F.H0:p=0.5

H1:p<0.5

What is the test statistic?

z=( Round to two decimal places as needed.)

What is the P-value?

P-value=(Round to three decimal places as needed.

What is the conclusion about the null hypothesis?

A.Reject the null hypothesis because the P-value is lessthanorequalto the significance level,

B.Failtoreject the null hypothesis because the P-value is lessthanorequalto the significance level,

C. Reject the null hypothesis because the P-value is greaterthan the significance level,

D. Failtoreject the null hypothesis because the P-value is greaterthan the significance level,

What is the final conclusion?

A.There isnot sufficient evidence to support the claim that most medical malpractice lawsuits are dropped or dismissed.

B.There isnot sufficient evidence to warrant rejection of the claim that most medical malpractice lawsuits are dropped or dismissed.

C. There is sufficient evidence to warrant rejection of the claim that most medical malpractice lawsuits are dropped or dismissed.

D.There is sufficient evidence to support the claim that most medical malpractice lawsuits are dropped or dismissed.

2) Twenty-eight different video games showing alcoholuse were observed. The duration times of alcoholuse(in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 79 sec, what does df denote, and what is its value?

What does df denote?

A.The number of degrees of freedom

B.The sample standard deviation

C.The test statistic

D.The sample size

3)The claim is that weights (grams) of quarters made after 1964 have a mean equal to 5.670 g as required by mint specifications. The sample size is n=35 and the test statistic is t=2.322. Use technology to find the P-value. Based on the result, what is the final conclusion? Use a significance level of 0.10.

State the null and alternative hypotheses.

H0:

H1:

(Type integers or decimals. Do not round.)

4)In a study of pulse rates of men, a simple random sample of 146 men results in a standard deviation of 11.7 beats per minute. The normal range of pulse rates of adults is typically given as 60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a standard deviation of 10 beats per minute. Use the sample results with a 0.05

significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute.

What do the results indicate about the effectiveness of using the range rule of thumb with the "normal range" from 60

to 100 beats per minute for estimating o in this case? Assume that the simple random sample is selected from a normally distributed population.

Let denote population standard deviation of the pulse rates of men (in beats per minute). Identify the null and alternative hypotheses.

H0:

H1:

(Type integers or decimals. Do not round.)