a standard deviation of 9.8, and all the students' test grades in Social Studies had a mean of 63.4 and a standard deviation of 9.6 to answer the following questions. a) Calculate the z-score for Lauren's test grade. z=z= b) Calculate the z-score for Chelsea's test grade. z=z= c) Which person did relatively better? Lauren Chelsea They did equally well.

a standard deviation of 9.8, and all the students' test grades in Social Studies had a mean of 63.4 and a standard deviation of 9.6 to answer the following questions. a) Calculate the z-score for Lauren's test grade. z=z= b) Calculate the z-score for Chelsea's test grade. z=z= c) Which person did relatively better? Lauren Chelsea 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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Question

100%

Lauren and Chelsea began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Lauren took a test in Math and earned a 75, and Chelsea took a test in Social Studies and earned a 70. Use the fact that all the students' test grades in the Math class had a mean of 76.4 and a standard deviation of 9.8, and all the students' test grades in Social Studies had a mean of 63.4 and a standard deviation of 9.6 to answer the following questions.

a) Calculate the z-score for Lauren's test grade.
z=z=

b) Calculate the z-score for Chelsea's test grade.
z=z=

c) Which person did relatively better?