Proportion Z Test

This is the correct formula for finding the Margin of Error for a sample proportion.

• True

• False

This is the correct formula for finding a z-score for a one proportion hypothesis test.

• True

• False

A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. Find p-hat

• 0.25

• 0.50

• 0.40

• 0.30

A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. Find the confidence interval at a 95% confidence level.

• (0.15, 0.32)

• (0.12, 0.38)

• (0.015, 0.032)

• (0.012, 0.038)

• A

• B

• C

• D

• E

A random sample of 425 citizens of Naboo found that 34% support the Galactic Republic. A sample of 585 citizens of Tatooine found that 38% support the Galactic Republic. What test would you use to determine if the the proportions are different?

• 2 sample z-test for mean 

• 2 sample t-test for mean

• matched-pairs dependent sample t-test for mean

• 2 - proportion z test

A random sample of 425 citizens of Naboo found that 34% support the Galactic Republic. A sample of 585 citizens of Tatooine found that 38% support the Galactic Republic. What test would you use to determine if the the proportions are different?

• 2 sample z-test for mean 

• 2 sample t-test for mean

• matched-pairs dependent sample t-test for mean

• 2 - proportion z test

In a random sample of 60 shoppers chosen from the shoppers at a large mall, 36 indicated that they had been to a movie in the past month. In an independent random sample of 50 shoppers chosen from the shoppers in the downtown shopping area, 31 indicated that they had been to a movie in the past month. What significance test should be used to determine whether these data provide sufficient evidence to reject the hypothesis that the proportion of shoppers at the mall who had been to a movie in the past month is the same as the proportion of shoppers in the downtown shopping area who had been to a movie in the past month?

• One proportion z-test

• One sample z-test for a mean

• One sample t-test for a mean

• Two proportion z-test

• Two sample t-test for means

A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. It was previously believed that 30% of adults agree that toddlers should not be taken out to eat at a restaurant. I there evidence to suggest an decrease in this rate? Find the z-score.

• -0.766

• 0.766

• -0.724

• 0.724

Tina wants to know if the proportion of people who buy burgers is at all affected by her open mic reading. If p=0.8 before her reading, what is an appropriate set of hypotheses?

• Ho: p = 0.8
  Ha: p > 0.8

• Ho: p = 0.8
  Ha: p < 0.8

• Ho: p ≠ 0.8
  Ha: p = 0.8

• Ho: p= 0.8
  Ha: p ≠ 0.8