3a. The STS (to 2 decimals) is x? = 40.04 3b. The P-value (to 3 decimals) =

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
icon
Related questions
Topic Video
Question

I need help with 3a and 3b. 

60
50
30
line
20
10
53.5 57.5 61.5 65,5 69,5 73,5 77,5 81.5
Exam Scores
Range
Frequency
Below 61.5
12
ctor
61.5-65.5
30
65.5-69.5
69
69.5-73.5
59
73.5-77.5
27
Above 77.5
3
The graph and table above show results from the same random sample of 200 exam scores. At a 10% Level
of Significance, test to see if the data fits a normal distribution with mean u = 69.5 and standard
deviation o = 4.
To figure out the E column, use the Empirical Rule: (68% within one standard deviation, 95% within two
standard deviations, the rest beyond two standard deviations.
Note: Even if you get E < 5, go ahead and proceed as usual; do not combine categories.
1. The hypotheses are :
O Ho:Exam scores are not normally distributed
Ha:Exam scores are normally distributed
O Ho:Exam scores are normally distributed
Ha:Exam scores are not normally distributed
kouənbas
Transcribed Image Text:60 50 30 line 20 10 53.5 57.5 61.5 65,5 69,5 73,5 77,5 81.5 Exam Scores Range Frequency Below 61.5 12 ctor 61.5-65.5 30 65.5-69.5 69 69.5-73.5 59 73.5-77.5 27 Above 77.5 3 The graph and table above show results from the same random sample of 200 exam scores. At a 10% Level of Significance, test to see if the data fits a normal distribution with mean u = 69.5 and standard deviation o = 4. To figure out the E column, use the Empirical Rule: (68% within one standard deviation, 95% within two standard deviations, the rest beyond two standard deviations. Note: Even if you get E < 5, go ahead and proceed as usual; do not combine categories. 1. The hypotheses are : O Ho:Exam scores are not normally distributed Ha:Exam scores are normally distributed O Ho:Exam scores are normally distributed Ha:Exam scores are not normally distributed kouənbas
2. This is a
O leftO rightO two o tailed test; d.f. = 5
3a. The STS (to 2 decimals) is x?
40.04
3b. The P-value (to 3 decimals) =
4a. The decision at a = 10% is
O Do not reject Ho
O Reject Ho
4b. The conclusion is
O There is insufficient evidence to conclude that Exam scores are normally distributed
O There is sufficient evidence to conclude that Exam scores are not normally distributed
O There is sufficient evidence to conclude that Exam scores are normally distributed
O There is insufficient evidence to conclude that Exam scores are not normally distributed
Transcribed Image Text:2. This is a O leftO rightO two o tailed test; d.f. = 5 3a. The STS (to 2 decimals) is x? 40.04 3b. The P-value (to 3 decimals) = 4a. The decision at a = 10% is O Do not reject Ho O Reject Ho 4b. The conclusion is O There is insufficient evidence to conclude that Exam scores are normally distributed O There is sufficient evidence to conclude that Exam scores are not normally distributed O There is sufficient evidence to conclude that Exam scores are normally distributed O There is insufficient evidence to conclude that Exam scores are not normally distributed
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Algebraic Operations
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.
Recommended textbooks for you
A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability
A First Course in Probability
Probability
ISBN:
9780321794772
Author:
Sheldon Ross
Publisher:
PEARSON