O Phone calls and days of the week are dependent. O Phone calls and days of the week are independent. O The distribution of phone calls is uniform over the days of the O The distribution of phone calls is not uniform over the days of d. The degrees of freedom %3D
O Phone calls and days of the week are dependent. O Phone calls and days of the week are independent. O The distribution of phone calls is uniform over the days of the O The distribution of phone calls is not uniform over the days of d. The degrees of freedom %3D
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:nts X
O (135) X
S Hints X
9 Hints X
D (135) x O (135) X
O (135) X
D (135) X
D (135) X
showtest.php?action=skip&to=10&reattempt=D10
*引(G
H1:
O Phone calls and days of the week are dependent.
O Phone calls and days of the week are independent.
O The distribution of phone calls is uniform over the days of the week.
O The distribution of phone calls is not uniform over the days of the week.
d. The degrees of freedom =
e. The test-statistic for this data =
(Please show your answer to three decimal places.)
f. The p-value for this sample :
(Please show your answer to four decimal places.)
a
g. The p-value is Select an answer
h. Based on this, we should Select an answer
i. Thus, the final conclusion is...
O There is sufficient evidence to conclude that the distribution of phone calls is uniform over the days
DD
F11
000
000
F10
F8
F9
F6
F7
F4
F5

Transcribed Image Text:B Hints x
D (135) X
O Hints x
O Hints x
D (135) x
(135) x
D (135)
D (135) X
D (135) X
ent/showtest.php?action=skip&to=10&reattempt3D10
* ES
Are phone calls equally likely to occur any day of the week? The day of the week for each of 399 randomly
selected phone calls was observed. The results are displayed in the table below. Use an a = 0.10 significance
level.
a. Complete the rest of the table by filling in the expected frequencies:
Frequencies of Phone Calls for Each Day of the
Week
Outcome Frequency Expected Frequency
Sunday
56
Monday
52
Tuesday
63
Wednesday 46
Thursday
71
Friday
62
Saturday
49
b. What is the correct statistical test to use?
Select an answer v
c. What are the null and alternative hypotheses?
Но:
O The distribution of phone calls is not uniform over the days of the week.
O The distribution of phone calls is uniform over the days of the week.
O Phone calls and days of the week are independent.
O Phone calls and days of the week are dependent.
Expert Solution

Working
a)
Freuency (O) | Expected E | (O-E)^2 | (O-E)^2/E |
56 | 57 | 1 | 0.017544 |
52 | 57 | 25 | 0.438596 |
63 | 57 | 36 | 0.631579 |
46 | 57 | 121 | 2.122807 |
71 | 57 | 196 | 3.438596 |
62 | 57 | 25 | 0.438596 |
49 | 57 | 64 | 1.122807 |
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