1) In a standard normal distribution the probability given in the table corresponding the z value 1.52 is

a) 0.9357

b) 0.9359

c) 0.9657

d) answer not given

2) "If normal random variable from a normally distributed population with mean 21 and standard deviation 4, is 15. The value of standard normal random variable will be ____________"

a) -1.5

b) 1.5

c) 2.4

d) -2.4

3) "Using a 95% confidence interval instead of a 98% confidence interval for the same population and sample, will give a confidence interval which is:"

a) Narrower

b) Wider

c) Same width

d) Same value

4) "The Medical Rehabilitation Education Foundation reports that the average cost of rehabilitation for stroke victims is $24,672. To see if the average cost of rehabilitation is different at a particular hospital, a researcher selects a random sample of 35 stroke victims at the hospital and finds that the average cost of their rehabilitation is $26,343. The standard deviation of the population is $3251. At alpha = 0.01, can it be concluded that the average cost of stroke rehabilitation at a particular hospital is different from $24,672?"

a)"There is no enough evidence to support the claim that the average cost of rehabilitation at the particular hospital is different from $24,672.

b) "Average cost of rehabilitation at the particular hospital cannot be determined"

c) Average cost of rehabilitation at the particular hospital is exactly $24,672"

d) "Average cost of rehabilitation at the particular hospital is different from $24,672"