Referring to question 29, the probability of making a Type II ...

[vicotolentino]

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

[ansleighelindsey]

Answer to Question 1

A

Answer to Question 2

A

[vicotolentino]

Thanks for the timely response, appreciate it

[ghepp]

Gracias!