Jacy and Bella began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Jacy took a test in Math and earned a 78.2, and Bella took a test in Social Studies and earned a 67.7. Use the fact that all the students' test grades in the Math class had a mean of 74.7 and a standard deviation of 10.1, and all the students' test grades in Social Studies had a mean of 60 and a standard deviation of 8.6 to answer the following questions. a) Calculate the z-score for Jacy's test grade. Z= b) Calculate the z-score for Bella's test grade. Z= c) Which person did relatively better? Jacy Bella They did equally well.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Jacy and Bella began arguing about who did better on their tests, but they couldn't decide who did better
given that they took different tests. Jacy took a test in Math and earned a 78.2, and Bella took a test in
Social Studies and earned a 67.7. Use the fact that all the students' test grades in the Math class had a
mean of 74.7 and a standard deviation of 10.1, and all the students' test grades in Social Studies had a
mean of 60 and a standard deviation of 8.6 to answer the following questions.
a) Calculate the z-score for Jacy's test grade.
Z=
b) Calculate the z-score for Bella's test grade.
Z=
c) Which person did relatively better?
O Jacy
W
Bella
O They did equally well.
Submit Question
Ei
82°F
>
1.8
a
Transcribed Image Text:Jacy and Bella began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Jacy took a test in Math and earned a 78.2, and Bella took a test in Social Studies and earned a 67.7. Use the fact that all the students' test grades in the Math class had a mean of 74.7 and a standard deviation of 10.1, and all the students' test grades in Social Studies had a mean of 60 and a standard deviation of 8.6 to answer the following questions. a) Calculate the z-score for Jacy's test grade. Z= b) Calculate the z-score for Bella's test grade. Z= c) Which person did relatively better? O Jacy W Bella O They did equally well. Submit Question Ei 82°F > 1.8 a
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