# Question

The Journal of American College Health found that 56.4% of college students who lived in coed dormitories consumed alcohol weekly (compared with 26.5% who lived in single sex dormitories). A random sample of 160 students who live in coed dormitories was selected.

a. What is the probability that more than 50% of the students in the sample consume alcohol weekly?

b. What is the probability that less than 65% of the students in the sample consume alcohol weekly?

c. What impact would changing the sample size to 100 students have on the results in part a?

d. Identify the symmetrical interval that includes 95% of the sample proportions with a sample size of 160 if the true population proportion of students in coed dormitories who consume alcohol weekly is 56.4%.

a. What is the probability that more than 50% of the students in the sample consume alcohol weekly?

b. What is the probability that less than 65% of the students in the sample consume alcohol weekly?

c. What impact would changing the sample size to 100 students have on the results in part a?

d. Identify the symmetrical interval that includes 95% of the sample proportions with a sample size of 160 if the true population proportion of students in coed dormitories who consume alcohol weekly is 56.4%.

## Answer to relevant Questions

A certain unnamed statistics teacher needs to grade 90 exams. The teacher claims that exams require an average of 12 minutes to grade with a standard deviation of 3 minutes. A random sample of 15 exams is selected. a. What ...According to the Bureau of Labor Statistics, the average workweek for an adult in the United States in February 2013 was 34.5 hours. Assume the population standard deviation for the number of hours worked per week is 5.0 ...According to the Department of Transportation, the average licensed driver travels 1,123 miles per month in his or her vehicle. Assume the population standard deviation is 341 miles per month. Determine the interval that ...For a normal population with a mean equal to 80 and a standard deviation equal to 15, determine the probability of observing a sample mean of 85 or less from a sample of size 10. Toyota Motor Corporation developed the Scion car model to appeal to young consumers. Toyota claims the average age of a Scion driver is 26 years old. Suppose a random sample of 18 Scion drivers was drawn, and the average age ...Post your question

0