EBK BUSINESS STATISTICS
8th Edition
ISBN: 9780135179833
Author: STEPHAN
Publisher: VST
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The owner of a moving company typically has their most experienced manager predict the total number of labor hours that will be required to complete an upcoming move. The approach has proven useful in the past, but the owner has their business objective of developing a more accurate method of predicting labor hours. In a preliminary effort to provide a more accurate method, the owner has decided to use the number of cubic feet moved as the independent variable and has collected data for 36 moves. The data is seen below:
Hours
Feet
24.00
545
13.50
400
26.25
562
25.00
540
9.00
220
20.00
344
22.00
569
11.25
340
50.00
900
12.00
285
38.75
865
40.00
831
19.50
344
18.00
360
28.00
750
27.00
650
21.00
415
15.00
275
25.00
557
45.00
1028
29.00
793
21.00
523
22.00
564
16.50
312
37.00
757
32.00
600
34.00
796
25.00
577…
At a large furniture and electrical store, customers usually find that the furniture on display is not held in stock. Rather than being immediately available, it must be sourced from manufacturers. In the sofa department, the average delivery time is expected to be
six
weeks after purchase. In order to test whether this target is accurate, the store records the delivery times (in days) taken for
50
sofa purchases. Complete parts (a) through (d).
LOADING...
Click the icon to view the data table.
a. The supervisor claims that the mean number of days between receipt of the order and delivery of the sofa is
42
days or more. At the
0.05
level of significance, is there evidence that the claim is not true (that is, that the mean number of days is less than
42)?
State the null and alternative hypotheses. Choose the correct answer below.
A.
H0:
μ>42
H1:
μ<42
B.
H0:
μ≠42
H1:
μ=42
C.
H0:
μ≤42
H1:
μ>42
D.
H0:…
At a large furniture and electrical store, customers usually find that the furniture on display is not held in stock. Rather than being immediately available, it must be sourced from manufacturers. In the sofa department, the average delivery time is expected to be
six
weeks after purchase. In order to test whether this target is accurate, the store records the delivery times (in days) taken for
50
sofa purchases. Complete parts (a) through (d).
LOADING...
Click the icon to view the data table.
a. The supervisor claims that the mean number of days between receipt of the order and delivery of the sofa is
42
days or more. At the
0.05
level of significance, is there evidence that the claim is not true (that is, that the mean number of days is less than
42)?
State the null and alternative hypotheses. Choose the correct answer below.
A.
H0:
μ>42
H1:
μ<42
B.
H0:
μ≠42
H1:
μ=42
C.
H0:
μ≤42
H1:
μ>42
D.…
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