Please help

1. For thettest , one uses ----------------instead of

A. n

B. s

C.

D. t

2. When the value of is increased, the probability of committing a Type I error is

A. Decreased

B. Increased

C. The same

D. None of the above

5. If you wish to test the claim that the mean of the population is 100, the appropriate null hypothesis is

A. x = 100

B. 100

C. =100

D. 100

6. In hypothesis testing,the assumption(s) for the Z test for a Mean when theis known

A. The sample is a random sample

B. Either n > or = 25 or the population is normally distributed if n < 25

C. both a) and b)

E. none of the above