Question 1.  In general, higher confidence levels provide

a) a smaller standard error

b) wider confidence intervals

c) narrower confidence intervals

d) unbiased estimates

Question 2.  More evidence against H0 is indicated by

a) smaller p-values

b) smaller critical values

c) lower levels of significance

d) lower probabilities of a Type II error

Question 3.  The mean of the t distribution is

a) 0

b) 0.5

c) 1

d) a problem specific

Question 4. In a stem-and-leaf display,

a) a single digit is used to define each stem, and a single digit is used to define each leaf

b) a single digit is used to define each stem, and one or more digits are used to define each leaf

c) one or more digits are used to define each stem, and one or more digits are used to define each leaf

d) one or more digits are used to define each stem, and a single digit is used to define each leaf

Question 5. In analysis of variance, the levels of the factor are called the

a) experimental units

b) treatments

c) observations

d) dependent variables