I. The only way to simultaneously reduce the chances of making either a Type I e
ID: 3067427 • Letter: I
Question
I. The only way to simultaneously reduce the chances of making either a Type I error or a Type II error is to:
a. reduce the significance level.
b. increase the significance level.
c. reduce the sample size.
d. increase the sample size. e. keep the sample size constant
II. The average temperature in winter of a recent year was 33.2°F. A weather report claims that it might further decrease in the current year. State the null and alternative hypothesis.
a. H0: ? = 33.2 vs. Ha: ? < 33.2
b. H0: ? = 33.2 vs. Ha: ? > 33.2
c. H0: ? = 33.2 vs. Ha: ? ? 33.2
d. H0: ? = 33.2 vs. Ha: ? ? 33.2
e. H0: ? = 33.2 vs. Ha: ? ? 33.2
Explanation / Answer
I.
d. increase the sample size.
increasing or decreasing significance level do not help to reduce any of the errors.
II.
here claim is there might further decrease in temperature, hence Ha: mu < 33.2
option a is correct.
a. H0: ? = 33.2 vs. Ha: ? < 33.2