Author Question: Suppose a 95 confidence interval for p, the proportion of drivers who admit that they sometimes run ... (Read 179 times)

washai · **on:** Jul 24, 2018

Suppose a 95 confidence interval for p, the proportion of drivers who admit that they sometimes run red lights when no one is around, is 0.29 to 0.38 . Which of the following statements is false?
a. A test of H0: p = 0.3 versus Ha: p 0.3 would not be rejected using = 0.05.
b. A test of H0: p = 0.5 versus Ha: p 0.5 would be rejected using = 0.05.
c. It is plausible that about 37 of all drivers would admit that they sometimes run red lights when no one is around.
d. It is plausible that a majority of all drivers would admit that they sometimes run red lights when no one is around.

Question 2

What are the degrees of freedom for the t-distribution?