The claim that lengths of CBC commercials have a standard deviation less than 15 s is to be tested at the 0.01 significance level.
Respond to each of the following:
a. Give the null hypothesis in symbolic form.
b. Is this test left-tailed, right-tailed, or two-tailed?
c. In simple terms devoid of symbolism and technical language, describe the type I error.
d. In simple terms devoid of symbolism and technical language, describe the type II error.
e. Identify the probability of making a type I error.