The owner of a small dell is trying to decide whether to discontinue selling magazines. He suspectsthat only 7.9% of his customers buy a magazine and he thinks that he might be able to use thedisplay space to sell something more profitable. Before making a final decision, he decides that forone day he will keep track of the number of customers that buy a magazine.(a) Explain why this is a binomial experiment.(b) Assuming his suspicion that 7.9% of his customers buy a magazine is correct, what is theprobability that exactly 2 out of the first 11 customers buy a magazine? Give your answer as adecimal number rounded to two digits.(c) What is the expected number of customers from this sample that will buy a magazine?

If each trial has only two possible outcomes, that is, success and failure, the probabilities of…

Answered: The owner of a small dell is trying to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A researcher claims that exactly 40% of all adults in the U.S. use their cell phone for most of their online browsing. You believe that the true proportion is different. To test this, you take a simple random sample of 200 adults in the U.S and find that 44% of them use their phone for most of their online browsing. Test at 5% significance. Round to the fourth as needed What's the minimum population size required? How many successes were there? Ho: Select an answer V Select an answer v HA: Select an answer V Select an answer V Test Statistic: P-value: Did something significant happen? Select an answer Select the Decision Rule: Select an answer There Select an answer v enough evidence to conclude Select an answer Build a 95% confidence interval and decide if you can conclude the same. Use your calculator to do this and round to the fourth decimal place. Can we conclude the same as our Hypothesis Test? v because the true proportion of U.S. adults that use their cell phones for most of…
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A researcher claims that exactly 40% of all adults in the U.S. use their cell phone for most of their online browsing. You believe that the true proportion is different. To test this, you take a simple random sample of 200 adults in the U.S and find that 40% of them use their phone for most of their online browsing. Test at 5% significance. Round to the fourth as needed What's the minimum population size required? 200 How many successes were there? 80 Ho:P o 0.40 HAP o 0.40 Test Statistic: 0.00 P-value: 1.0000 Did something significant happen? Nothing Significant Happened Select the Decision Rule: Fail to Reject the Null v There is not that the proportion of all adults in the U.S. who use their cell phone for most of their online browsing is different than 0.4 v o enough evidence to conclude Build a 95% confidence interval and decide if you can conclude the same. Use your calculator to do this and round to the fourth decimal place. Can we conclude the same as our Hypothesis Test? yes o…
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