The time taken for a computer to boot up, X, follows a normal ...

[j.rubin]

The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds. What is the standardized score (z-score) for a boot-up of time x =35 seconds?
 a. -2.0
  b. 0.0
  c. 1.0
  d. 2.0

Question 2

The following ranges are possible 95 confidence intervals for the percentage of Americans who think they work too many hours. For which one of the confidence intervals could you conclude that a majority of the population thinks they work too many hours?
 a. 41 to 49
  b. 49 to 54
  c. 42 to 51
  d. 52 to 58

[mmj22343]

Answer to Question 1

C

Answer to Question 2

D

[j.rubin]

Thanks for the timely response, appreciate it

[duy1981999]

Great answer, keep it coming