The decision variables of a model are also known as the a. ...

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The decision variables of a model are also known as the
 a. uncontrollable output
  b. controllable inputs
 c. environmental factors
  d. projected results

Question 2

You are given the following data regarding a sample. X 16 12 21 10 13 18
 a. Compute the mean and the variance.
  b. Using the critical value approach, test to determine if the variance of the population from which this sample is taken is significantly more than 12 . Let  = 0.05.

[ricroger]

Answer to Question 1

b

Answer to Question 2

a. Sample mean = 15; Sample variance = 16.8
b. Since the test statistic 2 = 7 < 11.070, do not reject H0 and conclude there is not sufficient evidence to show the variance is significantly more than 12.

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Thanks for the timely response, appreciate it

[xiaomengxian]

Wow, this really help