A teacher claims that, on average, 30% of students in his class get an A, 20% get a B, 20% get a C, 30% get a D and the rest get an F. The grades of a random sample of his students over the years is recorded. Test the claim at 0.05% significance. Test for the claim that the following categories occur with the following frequencies: PA = 0.3; PB = 0.2; PC = 0.2; PD = 0.3 Test at the 0.05 significance level. Complete the table. Round all answers to three decimal places. Observed Expected Category Frequency Frequency Residual A 30 25 32 D 37 Ho : PA = 0.3; pB = 0.2; pc = 0.2; pD = 0.3 H1: at least one is different Original claim = ( Select an answer Enter the critical value, along with the significance level and degrees of freedom xla.dn below the graph. (Graph is for illustration only. No need to shade.) X²- Distribution 0.12 0.1 0.08 0.06 0.04 0.02 1739万乱訂相相巧创印乃 (Round to three decimal places.) Test Statistic = (Round to three decimal places.) p-value= (Round to four decimal places.) Decision: ( Select an answer + the claim that all 4 categories are Conclusion: ( Select an answer equally likely to be selected. Probability 60T 115 IZI 127 139
A teacher claims that, on average, 30% of students in his class get an A, 20% get a B, 20% get a C, 30% get a D and the rest get an F. The grades of a random sample of his students over the years is recorded. Test the claim at 0.05% significance. Test for the claim that the following categories occur with the following frequencies: PA = 0.3; PB = 0.2; PC = 0.2; PD = 0.3 Test at the 0.05 significance level. Complete the table. Round all answers to three decimal places. Observed Expected Category Frequency Frequency Residual A 30 25 32 D 37 Ho : PA = 0.3; pB = 0.2; pc = 0.2; pD = 0.3 H1: at least one is different Original claim = ( Select an answer Enter the critical value, along with the significance level and degrees of freedom xla.dn below the graph. (Graph is for illustration only. No need to shade.) X²- Distribution 0.12 0.1 0.08 0.06 0.04 0.02 1739万乱訂相相巧创印乃 (Round to three decimal places.) Test Statistic = (Round to three decimal places.) p-value= (Round to four decimal places.) Decision: ( Select an answer + the claim that all 4 categories are Conclusion: ( Select an answer equally likely to be selected. Probability 60T 115 IZI 127 139
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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Question
Q2
Transcribed Image Text:A teacher claims that, on average, 30% of students in his class get an A, 20% get a B, 20% get a C, 30% get
a D and the rest get an F. The grades of a random sample of his students over the years is recorded. Test
the claim at 0.05% significance.
Test for the claim that the following categories occur with the following frequencies:
РА — 0.3; рв — 0.2; рс — 0.2; pp — 0.3
Test at the 0.05 significance level. Complete the table. Round all answers to three decimal places.
Expected
Frequency Frequency
Observed
Category
Residual
A
30
В
25
32
D
37
Н. : РА — 0.3; рв — 0.2; рс — 0.2; pD — 0.3
Hj: at least one is different
Original claim =
Select an answer
Enter the critical value, along with the significance level and degrees of freedom x(a.df)
graph. (Graph is for illustration only. No need to shade.)
below the
X2- Distribution
0.12
0.1
0.08
0.06
0.04
0.02
98 为的引g
X
(Round to three decimal places.)
Test Statistic =
(Round to three decimal places.)
p-value=
(Round to four decimal places.)
Decision: Select an answer
Conclusion: Select an answer
e the claim that all 4 categories are
equally likely to be selected.
Probability
C.
43
103
60T
115
121
127
133
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