6- The claims H0:₁/₂=1 against Ha:₁/₂ 1 :

a.

satisfy the rules for setting up null and alternative hypotheses

b.

the quantities specified in the statements are based on sample values

c.

H0 is incorrectly set

d.

Ha is incorrectly set

7- Assuming normal distribution, a 95% confidence interval for the population mean when n=25 a sample standard deviation gives a sample standard deviations=3 and a sample mean = 58.3 is:

a.

(57.06, 59.54)

b.

(57.12, 59.48)

c.

(-57.12, 59.54)

d.

(-2.93, 2.93)

8- When testing =10 against Ha:<10, Type I error is committed when concluding:

a.

incorrectly that <10

b.

incorrectly that=10

c.correctly that <10

d.

correctly that =10