What happens to the standard deviation of as the sample size ...

[nautica902]

  What happens to the standard deviation of as the sample size decreases?
 

  a.It increases.
  b.It decreases.
  c.It stays the same.
  d.It becomes normal.

Question 2

  Suppose the income of recent college graduates who become public school teachers is approximately normally distributed with a mean income of 30,000 and a standard deviation of 5200. A random sample of size 30 is taken and the mean is calculated. What is the probability that this mean value will be between 29,500 and 32,000?
 

  a.0.4825
  b.0.1880
  c.0.6834
  d.0.9825

[Dominic]

Answer to Question 1

correct: a

Answer to Question 2

correct: c

[nautica902]

YES! Correct, THANKS for helping me on my review

[Bigfoot1984]

Thanks for the timely response, appreciate it