Bundle: Statistics for Business & Economics, Loose-Leaf Version, 13th + MindTap Business Statistics with XLSTAT, 1 term (6 months) Printed Access Card
13th Edition
ISBN: 9781337148092
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: Cengage Learning
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Chapter 20.7, Problem 16E
To determine
Find the quantity relatives and develop a weighted aggregate quantity index for Year 8 using the two years of data.
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You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 31 students. You want to test this claim. You randomly select 18
classes taught by full-time faculty and determine the class size of each. The results are shown in the table below. At α = 0.05, can you support the university's claim? Complete parts (a) through (d)
below. Assume the population is normally distributed.
36
28
25
27
29
35
32
39
31
28
380
22
26
29
24
27
24
30吋
24
(a) Write the claim mathematically and identify Ho and Ha.
Which of the following correctly states Ho and H₂?
○ A. Ho: μ31
Нa: μ≤31
E. Ho: "=31
Ha: μ 31
OF. Ho: μ=31
Нa: μ31
Test the claim about the population mean μ at the level of significance α. Assume the population is normally distributed.
μ
Claim: <4715; α = 0.05
Sample statistics: x = 4917, s = 5501, n = 54
What are the null and alternative hypotheses?
Ho:
Ha
(Type integers or decimals. Do not round.)
Find the standardized test statistic t.
t = ☐
(Round to two decimal places as needed.)
Find the P-value.
P =
(Round to three decimal places as needed.)
Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below.
Ho. There
enough evidence at the ☐ % level of significance to
Fail to reject
Reject
....
the claim.
A politician claims that the mean salary for managers in his state is more than the national mean, $85,000. Assume the the population is normally distributed and the population standard deviation is
$8700. The salaries (in dollars) for a random sample of 30 managers in the state are listed. At α = 0.01, is there enough evidence to support the claim? Use technology.
92,421
81,412
85,143
97,220
99,317
71,884
97,762
86,108
98,385
73,869
81,391
95,997
98,828
86,476
77,893
74,995
90,472
81,330
92,183
94,649
77,880
91,821
90,907
84,640
78,479
81,703
89,573
89,948
70,938
81,300
(a) Identify the null hypothesis and alternative hypothesis.
O A. Ho: " =85,000
Нa: μ85,000
D. Hoi u >85,000
Нa: μ≤85,000
(b) Identify the standardized test statistic.
Z=
B. Hoμ≥85,000
Haμ85,000
Haμ≤85,000
(Round the final answer to two places as needed. Round all intermediate values to three places as needed.)
(c) Find the P-value. Use technology.
(Round to three decimal places as needed.)
(d) Decide whether to reject…
Chapter 20 Solutions
Bundle: Statistics for Business & Economics, Loose-Leaf Version, 13th + MindTap Business Statistics with XLSTAT, 1 term (6 months) Printed Access Card
Ch. 20.2 - The following table reports prices and usage...Ch. 20.2 - An item with a price relative of 132 cost 10.75 in...Ch. 20.2 - A large manufacturer purchases an identical...Ch. 20.2 - Prob. 4ECh. 20.2 - Under the last-in, first-out (LIFO) inventory...Ch. 20.3 - Price relatives for three items, along with...Ch. 20.3 - The Mitchell Chemical Company produces a special...Ch. 20.3 - Prob. 8ECh. 20.3 - Compute the price relatives for the RB Beverages...Ch. 20.5 - Registered nurses in 2007 made an average hourly...
Ch. 20.5 - The average hourly wage rate for construction...Ch. 20.5 - Shipments of product from manufacturer to the...Ch. 20.5 - The revenue for Google for the years 2010-2014 is...Ch. 20.7 - Data on quantities of three items sold in Year 1...Ch. 20.7 - Prob. 15ECh. 20.7 - Prob. 16ECh. 20 - Many factors influence the retail price of...Ch. 20 - Nickerson Manufacturing Company has the following...Ch. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Prob. 22ECh. 20 - Seafood price and quantity data are reported by...Ch. 20 - Prob. 24ECh. 20 - Prob. 25ECh. 20 - Prob. 26E
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