udents and find the average ACT score is 29.5. The populat atistic? -1.40 O 1.40 D.20 None of the other choices is correct

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 3BGP
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The average ACT score last time was 28.5. This time we believe the average will increase. We sample 49
students and find the average ACT score is 29.5. The population standard deviation is 5. What is the test-
statistic?
-1.40
1.40
.20
None of the other choices is correct
-.20
Transcribed Image Text:The average ACT score last time was 28.5. This time we believe the average will increase. We sample 49 students and find the average ACT score is 29.5. The population standard deviation is 5. What is the test- statistic? -1.40 1.40 .20 None of the other choices is correct -.20
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