5. The confidence level is denoted by 1 – α. α is
a. the probability that a confidence interval will contain the
estimated population parameter.
b. the probability that a confidence interval will not contain
the estimated population parameter.
c. the probability that a confidence interval will contain the
sample statistic.
d. the probability that a confidence interval will not contain
the sample statistic.
7. The t-statistic is used in hypothesis testing
for a population mean when the actual population standard deviation
is not known.
True
False
11. In a given hypothesis test, the null hypothesis can be
rejected at the 0.10 and 0.05 level of significance, but cannot be
rejected at the 0.01 level. The most accurate statement about
the p-value for this test is
a.
p-value = 0.01
b.
p-value = 0.10
c.
0.01 < p-value < 0.05
d.
0.05 < p-value < 0.1
13. Which of the following is not true about the
t-distribution?
a.
It has a greater spread than the standard normal
distribution.
b.
It increasingly resembles the standard normal distribution as
degrees of freedom increase.
c.
It has a mean of zero.
d.
It is not a symmetric distribution when degrees of freedom are
sufficiently small