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Proportion Z Test and Intervals

Authored by Anthony Clark

Mathematics

12th Grade

Proportion Z Test and Intervals
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which confidence would result in a wider interval (assuming nothing else changed), 91% or 97%?

97%, z* is larger for higher confidence intervals

97%, the standard error is larger for higher confidence intervals

91%, z* is larger for lower confidence intervals

91%, the standard error is smaller for lower confidence intervals

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is an example of an interval estimate?

point estimate 

critical value

confidence interval

statistic

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What is the confidence interval being calculated in the image to the left?

90% confidence interval

95% confidence interval

99% confidence interval

35% confidence interval

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is the correct program to use on the TI-84 calculator in order to calculate confidence intervals for population proportion?

STAT->

TESTS->

7: ZInterval

STAT->

TESTS->

1-PropZint

STAT->

TESTS->

3: 2-SampZTest


STAT->

TESTS->

2:T-Test

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

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