A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1515 and the standard deviation was 316. The test scores of four students selected at random are 1920, 1260, 2260, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual The Z-score for 1920 is (Round to two decimal places as needed.) The Z-score for 1260 is (Round to two decimal places as needed.) The Z-score for 2260 is (Round to two decimal places as needed.) The Z-score for 1390 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual. = √₁ (,0) More "' Time Remaining: 00:16:56 ✡ Next

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1515 and the standard deviation was 316. The test scores of four
students selected at random are 1920, 1260, 2260, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual
The Z-score for 1920 is
(Round to two decimal places as needed.)
The Z-score for 1260 is
(Round to two decimal places as needed.)
The Z-score for 2260 is.
(Round to two decimal places as needed.)
Ne
The Z-score for 1390 is
4
(Round to two decimal places as needed.)
Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.
OA. The unusual value(s) is/are
(Use a comma to separate answers as needed.)
OB. None of the values are unusual.
=
H
"' 10
√₁ Vi
I.
(1,0)
More
Time Remaining: 00:16:56 Next
#
Q
Transcribed Image Text:A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1515 and the standard deviation was 316. The test scores of four students selected at random are 1920, 1260, 2260, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual The Z-score for 1920 is (Round to two decimal places as needed.) The Z-score for 1260 is (Round to two decimal places as needed.) The Z-score for 2260 is. (Round to two decimal places as needed.) Ne The Z-score for 1390 is 4 (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual. = H "' 10 √₁ Vi I. (1,0) More Time Remaining: 00:16:56 Next # Q
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