From a population that is not normally distributed and whose ...

[mpobi80]

From a population that is not normally distributed and whose standard deviation is not known, a sample of 50 items is selected to develop an interval estimate for . Which of the following statements is true?
 a. The standard normal distribution can be used.
  b. The t distribution with 50 degrees of freedom must be used.
  c. The t distribution with 49 degrees of freedom must be used.
  d. The sample size must be increased in order to develop an interval estimate.

Question 2

Excel's NORM.INV function can be used to compute _____.
 a. cumulative probabilities for a standard normal z value
  b. the standard normal z value given a cumulative probability
  c. cumulative probabilities for a normally distributed x value
  d. the normally distributed x value given a cumulative probability

[leeeep]

Answer to Question 1

c

Answer to Question 2

d

[mpobi80]

Excellent

[Dominic]

Gracias!