Statistics for Business and Economics
8th Edition
ISBN: 9780132745659
Author: Paul Newbold, William Carlson, Betty Thorne
Publisher: PEARSON
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Question
Chapter 2.2, Problem 12E
To determine
Compute the variance and the standard deviation of the given data.
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Chapter 2 Solutions
Statistics for Business and Economics
Ch. 2.1 - Prob. 1ECh. 2.1 - Prob. 2ECh. 2.1 - Prob. 3ECh. 2.1 - Prob. 4ECh. 2.1 - Prob. 5ECh. 2.1 - Prob. 6ECh. 2.1 - Prob. 7ECh. 2.1 - Prob. 8ECh. 2.1 - A random sample of 156 grade point averages for...Ch. 2.1 - Prob. 10E
Ch. 2.2 - Prob. 12ECh. 2.2 - Prob. 13ECh. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - Prob. 16ECh. 2.2 - Prob. 17ECh. 2.2 - Prob. 18ECh. 2.2 - Prob. 19ECh. 2.2 - Prob. 20ECh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.3 - Prob. 26ECh. 2.3 - Prob. 27ECh. 2.3 - Prob. 28ECh. 2.3 - Prob. 29ECh. 2.3 - Prob. 30ECh. 2.3 - Prob. 31ECh. 2.3 - Prob. 32ECh. 2.3 - Prob. 33ECh. 2.3 - Prob. 34ECh. 2.4 - Prob. 35ECh. 2.4 - Prob. 36ECh. 2.4 - Prob. 37ECh. 2.4 - Prob. 38ECh. 2.4 - Acme Delivery offers three different shipping...Ch. 2.4 - Prob. 40ECh. 2.4 - Prob. 42ECh. 2.4 - Prob. 43ECh. 2 - Prob. 44ECh. 2 - Prob. 46ECh. 2 - Prob. 47ECh. 2 - Prob. 49ECh. 2 - Prob. 50ECh. 2 - Prob. 51ECh. 2 - Prob. 52ECh. 2 - Prob. 55ECh. 2 - Prob. 56E
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Similar questions
A sample of n = 16 scores has a mean of M = 56and a standard deviation
of s = 12 .
a. Explain what is measured by the sample standard deviation.
b. Compute the estimated standard error for the sample mean and explain what is measured by the standard error.
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A sports shop selects a random sample and records the sales of items made in China and thosemade in America.
Country of origin
n
mean
St.Deviation
China
50
22.5
9.75
America
33
33.15
11.6
What is the SE Mean for the sales from China?
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Consider the following data:
−11,−5,−5,−11,13,−11,−5−11,−5,−5,−11,13,−11,−5
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Step 2 of 3:
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Given a sample with a mean of 57 and a standard deviation of 14, find x such that Pr(X > x) = 0.715. Round your answer to two decimal places, e.g. 22.96.
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The instructor takes a random sample of size from the population data and obtains the following sample data:
x
405
385
495
385
555
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7
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a
4784.17
b
8085.10
c
1347.52
d
1418.44
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Consider the following data:
−6,−1,−6,7,−1,−1,−6−6,−1,−6,7,−1,−1,−6
Copy Data
Step 1 of 3 :
Calculate the value of the sample variance. Round your answer to one decimal place.
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The Philadelphia office of Price Waterhouse Coopers LLP hired five accounting trainees this year. Their
monthly starting salaries were: $3,536; $3,173; $3,448; $3,121; and $3,622. (I) Compute the population mean.
(II) Compute the population variance. (III) Compute the population standard deviation. (IV) The Pittsburgh
office hired six trainees. Their mean monthly salary was $3,550, and the standard deviation was $250. Compare
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Americans spend an average of 23.6 hours per week online, with a standard deviation of 7. The distribution of internet watching is not necessarily normally distributed. Suppose you took a random sample of 50 people.
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The price for two tickets (including online service charges), a large popcorn, and two medium soft drinks at a sample of six theatre chains is as follows:
$36.15
$31.00
$35.05
$40.25
$33.75
$43.00
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(b) Compute the variance, standard deviation, and range.
(c) Are the data skewed? If so, how?
(d) Based on the results of
(a) through (c), what conclusions can you reach concerning the cost of going to the movies?
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Round your answers to decimal places.
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c. Develop a 99% confidence interval for the difference between the two population means.
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