A company conducted a survey to see whether its new toothpaste was morepopular with children or adults. Of the adults surveyed, about 11% use thetoothpaste. Compare this with the percentage of children who use thetoothpaste.Do not usetoothpasteUse toothpasteTotalChildren0.070.180.25Adults0.080.670.75Total0.150.851.0Select the true statement. Select the true statement.O A. A greater percentage of children (46%) use the toothpaste.O B. A smaller percentage of children (7%) use the toothpaste.C. A greater percentage of children (28%) use the toothpaste.O D. A smaller percentage of children (8%) use the toothpaste.

Answered: Image /qna-images/answer/73771927-ea49-4bf8-b430-ab289e64585c.jpg

Answered: A company conducted a survey to see…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.02. A Click the icon to view the discussion of sample size. The sample should include men and women. (Type whole numbers.) Sample size discussion The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1-a can be found by using the following expression: P191 P292 E=Za/2 n1 n2 Replace n, and n2 by n in the preceding formula (assuming that both samples have the same size) and replace each of p,, 9,, P2, and q2 by 0.5 (because their values are not known). Solving for n results in this expression: a/2 n = 2E? Print Done
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