First-semester GPAs for a random selection of freshmen at a large university are shown:1.9 3.2 2.8 3.0 2.5 2.7 3.1 2.7 2.0 2.8 2.1 2.4 2.0 2.9 3.8 2.7 2.8 3.2 3.5 3.8 1.9 4.0 3.0 3.4 2.7 3.3 2.0 1.9 3.0 3.8 3.9 2.7 2.2 2.8 2.9 2.1(Assume population standard deviation = 0.62)Answer the following questions:a) Which is the sample size?b) Which is the standard error of the sample means? c) Which is the best point estimate of the mean?d) Which is the lower limit of the 95% confidence interval of the mean number of jobs? e) Which is the upper limit of the 95% confidence interval of the mean number of jobs?f) Which is the margin of error of the 95% confidence interval?B) Which is the lower limit of the 99% confidence interval of the mean number of jobs? h) Which is the upper limit of the 99% confidence interval of the mean number of jobs?1) Which is the margin of error of the 99% confidence interval?1) Which is the sample standard deviation?abCdefghi0.1033: 0.20250.26650.6158932.55336#2.6172.819444:: 3.022# 3.086 First-semester GPAS for a random selection of freshmenat a large university are shown:1.9 3.2 2.8 3.0 2.5 2.7 3.1 2.7 2.0 2.8 2.1 2.4 2.0 2.9 3.82.7 2.8 3.2 3.5 3.8 1.9 4.0 3.0 3.4 2.7 3.3 2.0 1.9 3.0 3.83.9 2.7 2.2 2.8 2.9 2.1(Assume population standard deviation = 0.62)Answer the following questions:a) Which is the sample size?b) Which is the standard error of the sample means?c) Which is the best point estimate of the mean?d) Which is the lower limit of the 95% confidence interval of the mean number of jobs?e) Which is the upper limit of the 95% confidence interval of the mean number of jobs?f) Which is the margin of error of the 95% confidence interval?g) Which is the lower limit of the 99% confidence interval of the mean number of jobs?h) Which is the upper limit of the 99% confidence interval of the mean number of jobs?i) Whichj) Which is the sample standard deviation?the margin of error of the 99% confidence interval?abd.efgh: 0.1033:: 0.2025:: 0.2665:: 0.615893: 2.553: 2.617:: 2.819444: 3.022: 3.086: 36

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 10CYU

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First-semester GPAs for a random selection of freshmen at a large university are shown: 1.9 3.2 2.8 3.0 2.5 2.7 3.1 2.7 2.0 2.8 2.1 2.4 2.0 2.9 3.8 2.7 2.8 3.2 3.5 3.8 1.9 4.0 3.0 3.4 2.7 3.3 2.0 1.9 3.0 3.8 3.9 2.7 2.2 2.8 2.9 2.1 (Assume population standard deviation = 0.62) Answer the following questions: a) Which is the sample size? b) Which is the standard error of the sample means? c) Which is the best point estimate of the mean? d) Which is the lower limit of the 95% confidence interval of the mean number of jobs? e) Which is the upper limit of the 95% confidence interval of the mean number of jobs? f) Which is the margin of error of the 95% confidence interval? B) Which is the lower limit of the 99% confidence interval of the mean number of jobs? h) Which is the upper limit of the 99% confidence interval of the mean number of jobs? 1) Which is the margin of error of the 99% confidence interval? 1) Which is the sample standard deviation? a b C d e f g h i 0.1033 : 0.2025 0.2665 0.615893 2.553 36 #2.617 2.819444 :: 3.022 # 3.086

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