A high school principal claims that the average senior score was at least 25 on the ACT college entrance exam. A sample list of 32 student scores are shown below. At the 0.01 level of significance, is there enough evidence to REJECT the principal's claim? 23 25 25 27 28 29 30 19 20 21 22 27 26 19 16 22 18 18 23 23 19 22 23 28 30 17 13 32 35 20 21 25 1.) Is this a hypothesis test for mean or proportion? If it's a test for mean, do we know the population standard deviation? 2.) Based on your answer in #1, which calculator will you use: A.) Mean - o Known, B.) Mean - o Unknown or C.) Proportions 3.) Will we use a Z-test or t-test? How do you know?
A high school principal claims that the average senior score was at least 25 on the ACT college entrance exam. A sample list of 32 student scores are shown below. At the 0.01 level of significance, is there enough evidence to REJECT the principal's claim? 23 25 25 27 28 29 30 19 20 21 22 27 26 19 16 22 18 18 23 23 19 22 23 28 30 17 13 32 35 20 21 25 1.) Is this a hypothesis test for mean or proportion? If it's a test for mean, do we know the population standard deviation? 2.) Based on your answer in #1, which calculator will you use: A.) Mean - o Known, B.) Mean - o Unknown or C.) Proportions 3.) Will we use a Z-test or t-test? How do you know?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 9E
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Transcribed Image Text:Hypothesis Testing with the p-value Method
A high school principal claims that the average senior score was at least 25 on the ACT college entrance exam. A
sample list of 32 student scores are shown below. At the 0.01 level of significance, is there enough evidence to
REJECT the principal's claim?
23
25
25
27
28
29
30
19
20
21
22
27
26
19
16
22
18
18
23
23
19
22
23
28
30
17
13
32
35
20
21
25
1.) Is this a hypothesis test for mean or proportion? If it's a test for mean, do we know the population
standard deviation?
2.) Based on your answer in #1, which calculator will you use:
A.) Mean - o Known, B.) Mean - o Unknown or C.) Proportions
3.) Will we use a Z-test ort-test? How do you know?
4.) What is the direction of the tail? Left, right or two?
5.) Complete the Hypothesis statement below with the arrows in the correct direction. Mark an X next to
the claim.
Claim
Null
Ho:
(Use u for mean and p for proportion)
Alternative
Ha:
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