True or false, the standard deviation of a normally distributed ...

[HudsonKB16]

True or false, the standard deviation of a normally distributed variable can be any real number.
 
  A) True B) False

Question 2

A survey of randomly chosen adults found that 28 of the 63 women and 31 of the 67 men follow regular exercise programs. Construct a 95 confidence interval for the difference in the proportions of women and men who have regular exercise programs.
 
  A) -0.218 to 0.646 B) 0.246 to 0.646 C) 0.277 to 0.615 D) -0.186 to 0.151

[moormoney]

Answer to Question 1

B

Answer to Question 2

D

[HudsonKB16]

Thank you!

[moormoney]

Always glad to help...