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
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
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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Question
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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