Confidence Interval Estimation with TI-84

Confidence Interval Estimation with TI-84

Assessment

Interactive Video

Mathematics, Statistics, Business, Education

9th - 12th Grade

Hard

Created by

Sophia Harris

FREE Resource

This video tutorial demonstrates how to use the TI-84 calculator to determine a confidence interval for a population proportion. It uses a market research scenario where 500 adults are surveyed, and 421 own cell phones. The tutorial guides through entering data into the TI-84, selecting the correct test, and interpreting the results, which show a 95% confidence interval for the true proportion of adults with cell phones in the city.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of using the TI-84 calculator in this example?

To find the median of a dataset

To calculate the mean of a dataset

To determine a confidence interval for a population proportion

To perform a linear regression analysis

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many adult residents were surveyed in the market research scenario?

550

500

450

400

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the number of successes (people who own cell phones) in the survey?

421

450

500

379

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which option should be selected on the TI-84 to calculate the confidence interval?

Two-Prop Z Int

One-Prop Z Int

One-Prop Z Test

Two-Sample T-Test

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What confidence level is used in this example?

95%

90%

85%

99%

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the lower bound of the confidence interval obtained from the TI-84?

0.830

0.820

0.810

0.800

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the upper bound of the confidence interval obtained from the TI-84?

0.884

0.894

0.874

0.864

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