Suppose a 95 confidence interval for p, the proportion of drivers ...

[washai]

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?

[jonathanballen97]

Answer to Question 1

D

Answer to Question 2

24

[washai]

Thanks for the timely response, appreciate it

[isabelt_18]

Wow, this really help