A study of religious practices among college students interviewed a sample of 127 students; 107 of the students said that they prayed at least once in a while.Do the data support the idea that the majority of college students pray?

1.What are the hypotheses?

2.Calculate and interpret the confidence interval for 90% confidence.

3.Calculate and interpret the p-value ( = 0.05)

To work as a flight attendant for United Airlines, you must be between 5'2" and 6' tall. (source: www.ual.com).The height of 20- to 29-year-old males has a mean of 70.4" and a standard deviation of 3". The height of 20- to 29-year-old females has a mean of 65.1" and a standard deviation of 2.6".A random sample of 500 20- to 29-year-old people from the Midwest and 350 20- to 29-year-old people from the Northeast found that 82 from the Midwest and 65 from the Northeast did not meet the height requirement to work as a flight attendant.

How large, if any, is the difference between the proportion of people from the Midwest States and those in the Northeastern states who are eligible to work as United Airlines flight attendants.

1)Complete the frequency table

Midwest

Northeast

Total

Meet Height Requirements

Do Not Meet

Height

Requirements

Total

2)Write the null hypotheses in both words and mathematical symbols

3)Write the alternative hypotheses in both words and mathematical symbols

4)How many tails are in the alternative hypothesis?Justify your response.

5)Calculate the proportions (remember to include the pooled proportion)

6)Justify the independence condition

7)Justify the success-failure condition

8)Calculate the standard error

9)Calculate the test statistic (z-test)

10)Determine the p-value