There is a popular lottery in which a ticket is called a scratcher. An advertisement for this lottery claims that 55% of the population of all the scratchers are winning ones. You want to research this claim by selecting a random sample of 35 scratchers. Follow the steps below to construct a 90% confidence interval for the population proportion of all winning scratchers. Then state whether the confidence interval you construct contradicts the advertisement's claim. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from the random sample. Number Proportion Take Sample Winning scratcher Losing scratcher 14 0.4 21 0.6 Enter the values of the sample size, the point estimate of the population proportion, and the critical value you need for your 90% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: 0 Point estimate: Critical value: Compute Standard error: Critical values F0.005 -2.576 Margin of error: F0.010 -2.326 -0.025 -1.960 90% confidence interval: F0.0501.645 F0.100 = 1.282
There is a popular lottery in which a ticket is called a scratcher. An advertisement for this lottery claims that 55% of the population of all the scratchers are winning ones. You want to research this claim by selecting a random sample of 35 scratchers. Follow the steps below to construct a 90% confidence interval for the population proportion of all winning scratchers. Then state whether the confidence interval you construct contradicts the advertisement's claim. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from the random sample. Number Proportion Take Sample Winning scratcher Losing scratcher 14 0.4 21 0.6 Enter the values of the sample size, the point estimate of the population proportion, and the critical value you need for your 90% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: 0 Point estimate: Critical value: Compute Standard error: Critical values F0.005 -2.576 Margin of error: F0.010 -2.326 -0.025 -1.960 90% confidence interval: F0.0501.645 F0.100 = 1.282
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 2E
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