Below you are given the graphs of two normal density curves. Use these density c

Question

Below you are given the graphs of two normal density curves. Use these density curves to answer the following questions: (a) Which curve has the larger standard deviation? ____________ (b) Which curve has the smaller mean? ___________ (c) Which distribution has a larger percent of its data between 30 and 40 units? __________ (d) Give a rough estimate of the standard deviation of the density curve in Graph B: ________ Use the following information for questions 4 and 5. The heights of adult men in a certain town have been found to follow a normal distribution with a mean of 69.1 inches and a standard deviation of 3.5 inches.

Explanation / Answer

a) B) , the graph is more spreaded

b) A) has lower mean

as A has mean = 30

B has mean = 40

c)

for A - 30 -40 , it is around 50 %

for B , it is around 34 %

hence A

d)

for B)

sd = 10

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