An educator wants to construct a 90% confidence interval for the true proportion of California schoolchildren who are proficient in reading. Suppose that of a simple random sample of 700 California schoolchildren, 70% were proficient in reading. We are interested in the number that were proficient in reading.a) what parameter are we estimating? Select an answer ✓b) What is the point estimate of that parameter? Select an answer ✓c) What is a success for this problem? Select an answerd) How many successes were there?e) Find the margin of error for a 90% confidence interval, rounded to the 5th. Use your T-table for this.f) Round to the fourth.We are 90% confident that the true proportion of California school children that are proficient in reading isbetweenand

The sample size is .The proportion of proficient readers in the sample is .

Answered: An educator wants to construct a 90%…

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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In one study of smokers who tried to quit smoking with nicotine patch therapy, 30 were smoking after one year of treatment while 100 were not. We are interested in the true proportion of those that were still smoking after one year of treatment. a) What parameter are we estimating? p b) What is the point estimate of that parameter? ô c) What is a success for this problem? still smoking d) Find the margin of error for a 95% confidence interval, rounded to the 4th. e) Round to the fourth. We are 95% confident that the true proportion of those that were still smoking after one year of treatment is between and
A) What proportion of commercial airline pilots are more than 40 years of age? Suppose an analyst has access to a list of all pilots who are members of the Air Line Pilots Association. If this list is used as a frame for the study, she can randomly select a sample of pilots, contact them, and ascertain their ages. From 89 of these pilots so selected, she learns that 48 are more than 40 years of age. Construct an 85% confidence interval to estimate the population proportion of commercial airline pilots who are more than 40 years of age. B) Suppose you want to estimate the proportion of cars that are sport utility vehicles (SUVs) being driven in Regina at rush hour by standing on the corner of Victoria Avenue and Albert Street and counting SUVs. You believe the figure is no higher than 0.40. If you want the error of the confidence interval to be no greater than 0.03, how many cars should you randomly sample? Use a 90% level of confidence.
This data comes from the hours of sleep among nightshift and dayshift workers. How would i put into words the meaning of the confidence interval in relation to the topic
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A consumer group reports that a 90% confidence interval for the mean fat content of chicken nuggets from a fast-food restaurant is (14, 18). What is the mean fat content for the sample of 30 chicken nuggets or the point estimate that help make this confidence interval? A. 32 B. 16 C. 2
A baseball team claims that the mean length of its games is 2.4 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. A. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at most 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≤2.4." B. The null hypothesis expressed in words is, "the mean length of a baseball team's games is more than 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≠2.4." C. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at least 2.4 hours." The null hypothesis is expressed symbolically as, "H0: μ≥2.4." D. The null hypothesis expressed in words is, "the mean length of a baseball…
8. A confidence interval for estimating the mean An industrial/organizational psychologist wants to improve worker productivity for a client firm, but first he needs to gain a better understanding of the life of the typical white-collar professional. Fortunately, he has access to the 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a sample of 650 white-collar professionals (250 legal professionals and 400 other professionals). One of the survey questions was, “How many work-related emails do you receive during a typical workday?” For the subsample of legal professionals (n = 250), the mean response was M = 36.7 emails, with a sample standard deviation of s = 23.8 emails. The estimated standard error is sMM? = A-0.085, B-1.341, C-0.095 or D-1.505 (choices to choose from.) . Use the following Distributions tool to develop a 90% confidence interval estimate of the mean number of work-related emails legal…
1. The best point estimator for the average weight of current PBA players is __ kilograms 2. At 98% confidence, the estimate of the minimum weight of all PBA players is __ kilograms Kindly answer both questions please. Thanks.
chapter 7.1

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