According to crime statistics 65 of all murders in the Unite

According to crime statistics, 65% of all murders in the United States are committed by firearm.

In a random sample of 150 murders, find the probability that fewer than 60% were committed by firearm. Round off to the nearest whole percent.

Select one:

A. 10%

B. 54%

C. 90%

D. 22%

E. 1%

Question 2

Not yet answered

Points out of 1

Flag question

Question text

Referring to Question 1: In a random sample of 150 murders, find the probability that between 50% and 70% were committed by firearm. Round off to the nearest whole percent.

Select one:

A. 80%

B. 90%

C. 10%

D. 1%

E. 99%

Question 3

Not yet answered

Points out of 1

Flag question

Question text

In a Harris Poll conducted in May, 2000, 1016 people were asked: \"Do you happen to have in your home or garage any guns or revolvers?\" Based on the poll results, a 95% confidence interval for the proportion of the population having a gun or revolver in their home or garage was determined to have a lower limit of 0.36 and an upper limit of 0.42, with a margin of error of 0.03.

What percentage of the people sampled answered \"Yes\" to the question?

Select one:

A. 3%

B. 36%

C. 39%

D. 42%

E. Can\'t be determined from the information given.

Question 4

Not yet answered

Points out of 1

Flag question

Question text

In a random sample of 200 American adults, 24 say they have placed a bet on a horse race at least once. Find a 95% confidence interval for the true population proportion of all American adults that have bet on a horse race at least once.

Select one:

A. (0.097, 0.143)

B. (0.015 , 0.0225)

C. (0.03 , 0.021)

D. (0.075 , 0.165)

E. (0.12 , 0.21)

Question 5

Not yet answered

Points out of 1

Flag question

Question text

Referring to Question 4: The margin of error of the confidence interval is:

Select one:

A. 0.09

B. 0.045

C. 0.12

D. 0.023

E. 0.012

Question 6

Not yet answered

Points out of 1

Flag question

Question text

In a random sample of 462 cars returned to Universal Auto Rental, 26% were found to have body or windshield damage. Find a 95% confidence interval for the true population proportion of cars returned with body or windshield damage.

Select one:

A. (0.24 , 0.28)

B. (0.25 , 0.27)

C. (0.30 , 0.34)

D. (0.21 , 0.31)

E. (0.22 , 0.30)

According to crime statistics, 65% of all murders in the United States are committed by firearm.

In a random sample of 150 murders, find the probability that fewer than 60% were committed by firearm. Round off to the nearest whole percent.

Select one:

Z = (phat