A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1509 and the standard deviation was 315. The test scores of four students selected at random are 1890, 1250, 2240, and 1400. Find the z-score that correspond to each value and determine whether any of the values are unusual. The z-score for 1890 is 1.21 (Round to two decimal places as needed.) The z-score for 1250 is -0.82 (Round to two decimal places as needed.) The z-score for 2240 is. (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1509 and the standard deviation was 315. The test scores of four students selected at random are 1890, 1250, 2240, and 1400. Find the z-scores
that correspond to each value and determine whether any of the values are unusual,
The z-score for 1890 is 1.21.
(Round to two decimal places as needed.)
The z-score for 1250 is -0.82
(Round to two decimal places as needed.)
The z-score for 2240 is.
(Round to two decimal places as needed.)
Transcribed Image Text:A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1509 and the standard deviation was 315. The test scores of four students selected at random are 1890, 1250, 2240, and 1400. Find the z-scores that correspond to each value and determine whether any of the values are unusual, The z-score for 1890 is 1.21. (Round to two decimal places as needed.) The z-score for 1250 is -0.82 (Round to two decimal places as needed.) The z-score for 2240 is. (Round to two decimal places as needed.)
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman