A school administrator believes that the mean class GPAS for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a histogram, and calculate a, the t-statistic, and the p-value. From the histogram, can normality be assumed? Pick Yes x = Ex: 1.234 No t= p = Since the p-value is Pick than the significance level 0.05, the null hypothesis Pick Pick evidence exists that the mean GPA is greater than 2.75.
A school administrator believes that the mean class GPAS for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a histogram, and calculate a, the t-statistic, and the p-value. From the histogram, can normality be assumed? Pick Yes x = Ex: 1.234 No t= p = Since the p-value is Pick than the significance level 0.05, the null hypothesis Pick Pick evidence exists that the mean GPA is greater than 2.75.
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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Hi, Please answer all parts.
- Can normality be assumed?
Last parts, the options are:
- P Value : greater than OR Less than
- Null hypothesis: Fails to be rejected OR Is rejected
-
Transcribed Image Text:A school administrator believes that the mean class GPAS for a given course are higher than the preferred
mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a
histogram, and calculate x, the t-statistic, and the p-value.
From the histogram, can normality be assumed?
Yes
No
Pick
x = Ex: 1.234
t =
= d
Since the p-value is Pick
than the significance level 0.05, the null hypothesis Pick
Pick
evidence exists that the mean GPA is greater than 2.75.
![A
B
D
E
F
H
J
1
2.85
2.73
Frequency of 'Field1'
3
2.43
8
100%
4
3.01
90%
7
2.84
80%
6
70%
3.13
60%
7
2.81
50%
8
3.02
40%
30%
9.
3.10
20%
10
2.98
10%
11
2.94
0%
12
2.70
13
2.84
14
2.41
15
3.05
Field1
16
2.91
17
2.70
18
2.78
19
3.11
20
2.58
21
3.18
22
2.85
23
3.01
24
2.87
25
2.92
26
2.42
27
2.68
28
2.69
29
2.53
30
2.70
31
2.65
32
2.68
33
2.93
34
2.77
35
2.71
36
2.66
37
2.78
38
2.97
39
2.83
40
2.77
41
3.16
42
2.97
43
2.86
44
2.73
45
2.94
46
2.65
47
2.94
48
2.71
49
2.85
50
3.02
51
52
Frequency
(2.83, 2.86]
(2.68, 2.71]
(2.92, 2.95]
(3.01, 3.04]
[2.41, 2.44]
(2.65, 2.68]
(2.71, 2.74]
(2.77, 2.80]
(2.95, 2.98]
(3.16, 3.19]
(2.53, 2.56]
(2.56, 2.59]
* (2.62, 2.65] I
(2.74, 2.77]
(2.80, 2.83]
(2.86, 2.89]
(2.89, 2.92]
(3.04, 3.07]
(3.07, 3.10]
(3.10, 3.13]
(3.13, 3.16]
(2.44, 2.47]
(2.47, 2.50]
(2.50, 2.53]
(2.59, 2.62]
(2.98, 3.01]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F52bd3cfe-3c9b-40ce-8732-3b0b81ba9280%2F4b46bac4-236d-4520-9450-0095a50d26c7%2Fpn8ir9n_processed.png&w=3840&q=75)
Transcribed Image Text:A
B
D
E
F
H
J
1
2.85
2.73
Frequency of 'Field1'
3
2.43
8
100%
4
3.01
90%
7
2.84
80%
6
70%
3.13
60%
7
2.81
50%
8
3.02
40%
30%
9.
3.10
20%
10
2.98
10%
11
2.94
0%
12
2.70
13
2.84
14
2.41
15
3.05
Field1
16
2.91
17
2.70
18
2.78
19
3.11
20
2.58
21
3.18
22
2.85
23
3.01
24
2.87
25
2.92
26
2.42
27
2.68
28
2.69
29
2.53
30
2.70
31
2.65
32
2.68
33
2.93
34
2.77
35
2.71
36
2.66
37
2.78
38
2.97
39
2.83
40
2.77
41
3.16
42
2.97
43
2.86
44
2.73
45
2.94
46
2.65
47
2.94
48
2.71
49
2.85
50
3.02
51
52
Frequency
(2.83, 2.86]
(2.68, 2.71]
(2.92, 2.95]
(3.01, 3.04]
[2.41, 2.44]
(2.65, 2.68]
(2.71, 2.74]
(2.77, 2.80]
(2.95, 2.98]
(3.16, 3.19]
(2.53, 2.56]
(2.56, 2.59]
* (2.62, 2.65] I
(2.74, 2.77]
(2.80, 2.83]
(2.86, 2.89]
(2.89, 2.92]
(3.04, 3.07]
(3.07, 3.10]
(3.10, 3.13]
(3.13, 3.16]
(2.44, 2.47]
(2.47, 2.50]
(2.50, 2.53]
(2.59, 2.62]
(2.98, 3.01]
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