if the heights of 99.7% of American men are between 5' and 7' is your estimate of the standard deviation of height of American men?
a) 1 inch
b) 3 inches
c) 4 inches
d) 6 inches
e) 12 inches

I don't understand how to figure this out?

Question

if the heights of 99.7% of American men are between 5' and 7'  is your estimate of the standard deviation of height of American men?
a) 1 inch
b) 3 inches
c) 4 inches
d) 6 inches
e) 12 inches

I don't understand how to figure this out?

anonymous · Answer

@ankit042

anonymous · Answer

C( 4 inches

anonymous · Answer

@chrissaxe how did you get that? ihow to do it

anonymous · Answer

I don't understand how to do it

anonymous · Answer

@skinny23  thats a good question lol idk im bored in class and just guessed lol.

anonymous · Answer

can someone who knows this help me please?

ankit042 · Answer

I think we will assume it be a normal distribution. Now use the tables to find the Z value and use the formula

anonymous · Answer

so would I do 5-7/ 99.7%?

ankit042 · Answer

|dw:1380736418467:dw|