A smart phone manufacturer is interested in constructing a 95% confidence interval for theproportion of smart phones that break before the warranty expires. 90 of the 1506 randomlyselected smart phones broke before the warranty expired. Round answers to 4 decimal placeswhere possible.a. With 95% confidence the proportion of all smart phones that break before the warrantyexpires is betweenandb. If many groups of 1506 randomly selected smart phones are selected, then a differentpercent of theseconfidence intervals will contain the true population proportion of all smart phones that breakconfidence interval would be produced for each group. Aboutbefore the warranty expires and aboutpercent will not contain the true populationproportion.

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Answered: A smart phone manufacturer is…

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 smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 91 of the 1608 randomly selected smart phones broke before the warranty expired. Round answers to 5 decimal places where possible. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between ? and .? b. If many groups of 1608 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About ? percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about ? percent will not contain the true population proportion.
A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 90 of the 1595 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between ? and ? b. If many groups of 1595 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About ?percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about ? percent will not contain the true population proportion.
Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence interval for the true percentage of all adults that have high blood pressure is . What is the value of ? (Round to two decimal places).
Find a 95% confidence interval for the true population proportion. In a poll of 1079 college students, 22% said that they had cheated at least once on an exam
A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 86 of the 1686 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and . b. If many groups of 1686 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about percent will not contain the true population proportion.
The principal randomly selected six students to take an aptitude test. Their scores were:88.0 84.1 74.9 83.2 83.7 85.5Determine a 90% confidence interval for the mean score for all students.
In a survey of 2275 adults, 709 say they believe in UFOS. Construct a 90% confidence interval for the population proportion of adults who believe in UFOS. A 90% confidence interval for the population proportion is ( ). (Round to three decimal places as needed.)
CNN is conducting a poll, and wants to produce a 90% confidence interval for the proportion of all New York residents who favor legalizing recreational marijuana. Of the 602 randomly selected New Yorkers surveyed, 394 were in favor of the initiative. a. With 90% confidence, the proportion of New York residents who favor legalizing recreational marijuana is between BLANK and BLANK. b. Suppose that we survey 602 randomly selected Americans many times, and calculate a confidence interval for each group. About Blank . percent of these confidence intervals will contain the true population proportion of New Yorkers who favor legalizing recreational marijuana, and about BLANK percent will not contain the true population proportion.
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 91 of the 1608 randomly selected smart phones broke before the warranty expired. Round answers 5 decimal places where possible. a. With 90% confidence the proportion of all smartphones that break before the warranty expires is between ? and . ? b. If many groups of 1608 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About ? percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about ? percent will not contain the true population proportion.
In a recent year, 6% of cars sold had a manual transmission. A random sample of college students who owned cars revealed the following: out of 124 cars, 25 had manual transmissions. Estimate the proportion of college students who drive cars with manual transmissions with 90% confidence. Round intermediate and final answers to at least three decimal places.
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 399 drivers and find that 285 claim to always buckle up. Construct a 83% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]

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