28 The normal distribution a is symmetrical b is positively

28. The normal distribution

a. is symmetrical

b. is positively skewed

c. is negatively skewed

d. can be any of the above depending on data

e. none of the above

29. Type I error is:

a. the probability of not rejecting H 0 when H 0 is true

b. the probability of not rejecting H 0 when H 0 is false

c. the probability of rejecting H 0 when H 0 is true

d. the probability of rejecting H 0 when H 0 is false

e. the same thing as power

Solution

28.

The normal distribution is symmetrical distribution.

Answer: a

29.

Type I error is the probability of rejecting H0 when H0 is true.

Answer: c