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Author Question: Referring to question 29, the probability of making a Type II error is _________. a. 0.7764 c. ... (Read 73 times)

vicotolentino

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on: Jun 19, 2018
Referring to question 29, the probability of making a Type II error is _________.
 
  a. 0.7764 c. 0.2236
  b. 0.2400 d. 0.6459

Question 2

An English teacher has been teaching a sixth grade composition class for many years. He has the feeling that over the past several years, the writing ability of students has changed. A national test of proficiency in composition was administered 5 years ago. The resulting distribution of scores was normally shaped, had a mean of 85 and a standard deviation of 10.9 . In order to test his feeling, he gives his present class of 43 students the same proficiency test. The resulting mean is 80 and the standard deviation is 8.7 . Using the z test with  = 0.052 tail, what is your conclusion?
 
  a. reject H0; the present class appears deficient in composition writing
  b. retain H0; the present class is not deficient in composition writing
  c. accept H0; the present class is not deficient in composition writing
  d. reject H0; the present class is not deficient in composition writing


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ansleighelindsey

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Reply #1 on: Jun 19, 2018
Answer to Question 1

A

Answer to Question 2

A


vicotolentino

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Reply 2 on: Jun 19, 2018
Great answer, keep it coming :)

peter

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Reply 3 on: Yesterday
Gracias!

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