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Author Question: A teacher records the test scores for the 40 students in her class. Corresponding to each score, she ... (Read 78 times)

sdfghj

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on: Jul 25, 2018
A teacher records the test scores for the 40 students in her class. Corresponding to each score, she calculates a z-score. Julia's z-score is -2.8. Should she be concerned? Explain your reasoning.
 
  What will be an ideal response?

Question 2

Define the terms population and sample.
 
  What will be an ideal response?


Alyson.hiatt@yahoo.com

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Reply #1 on: Jul 25, 2018
Answer to Question 1

Answers will vary. Possible answer: Yes. Almost all z-scores lie between -3 and 3 so a z-score of -2.8 indicates that Julia's test score was lower than almost all of the other scores.

Answer to Question 2

A population is the complete collection of all individuals or items under consideration in a statistical study. A sample is that part of the population from which information is obtained.


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