Question

The distribution of the heights of students in a large class is roughly bellshaped. Moreover, the average height is 68 inches, and approximately 95% of the heights are between 62 and 74 inches. Thus, the standard deviation of the height distribution is approximately equal to

Answer 1

@sarahusher

Answer 2

Hey guys, statistics really isn't my strong point but if anyone is online and could help, that would be great
@primeralph @nincompoop @satellite73 @bahrom7893 @blurbendy @cruffo @dan815 @KingGeorge @hobbs978 @Zale101

Answer 3

This is a normal distribution. We have the mean and now we are looking for standard deviation

Answer 4

Remember, the question says, "roughly bell shaped". This implies its an approximately normal distribution.

Answer 5

For any normal distribution, 68% of the data lies within 1 standard deviation, 95% within 2 standard deviations, and 99.7% within 3 standard deviations. Hence it would be 2 S.D for heights in the range 62-74. @ichibanstunna

Answer 6

Thank you so much all of you helping me out. I have so many people watching i feel famous...lol

Answer 7

you tagged all of openstudy, what else could you expect? @ichibanstunna

Answer 8

thanks to @jack175

Answer 9

no @Jack175 did all of it

Answer 10

no it wasn't me it was jamie

Answer 11

um, yes it was....

Answer 12

can you guy s help me with one more?

Answer 13

jamie gets emotional around me, so she forgets that she posted it

Answer 14

Which one of the following choices is NOT a property of a normal distribution?

symmetric in shape
bell shaped curve
mean is located under the hightest peak of the curve
the entire area under the curve has a probability greater than 1

Answer 15

@ichibanstunna Please start a new post for a new question and close this one first.