A standardized exam is designed so that scores follow a normal distribution with a mean of 95 points and a standard devition of 10 points. Find the following. Round to two decimals if needed. Answers of 0 and 100% are possible due to raunding

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 14
A standardized exam is designed so that scores follow a normal distribution with a mean of 95 points and a
standard devition of 10 points.
Find the following. Round to two decimals if needed. Answers of 0 and 100% are possible due to rounding.
a. What percentile is a score of 90 points?
b. Out of 96 random samples of 13 scores, how many would you expect to have a mean score of between 90
and 100 points?
c. Find the score representing the cutoff for the top 2 percent of exam scores :
d. What percent of random samples of size 13 would you expect to have a mean that exceeds 100 points?
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MacBook Air
80
F3
000
F4
F6
F7
F9
F10
%23
%24
4.
&
3.
7
8
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Transcribed Image Text:• Question 14 A standardized exam is designed so that scores follow a normal distribution with a mean of 95 points and a standard devition of 10 points. Find the following. Round to two decimals if needed. Answers of 0 and 100% are possible due to rounding. a. What percentile is a score of 90 points? b. Out of 96 random samples of 13 scores, how many would you expect to have a mean score of between 90 and 100 points? c. Find the score representing the cutoff for the top 2 percent of exam scores : d. What percent of random samples of size 13 would you expect to have a mean that exceeds 100 points? Submit Question ctor MacBook Air 80 F3 000 F4 F6 F7 F9 F10 %23 %24 4. & 3. 7 8 R. Y <6 5
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