1)

Use z scores to compare the given values.

Based on sample data, newborn males have weights with a mean of 3242

g and a standard deviation of

540.6

g. Newborn females have weights with a mean of

3050.2

g and a standard deviation of

598.7

g. Who has the weight that is more extreme relative to the group from which they came: a male who weighs

1700

g or a female who weighs

1700

g?

Since the z score for the male is z equals=nothing

and the z score for the female is

z equals=nothing,

2)

According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean of

98.2598.25degrees°F

and a standard deviation of

0.640.64degrees°F.

Using Chebyshev's theorem, what do we know about the percentage of healthy adults with body temperatures that are within

33

standard deviations of the mean? What are the minimum and maximum possible body temperatures that are within

33

standard deviations of the mean?

3) In a study of speed dating, female subjects were asked to rate the attractiveness of their male dates, and a sample of the results is listed below

(1equals=not

attractive;

10equals=extremely

attractive). Find therange, variance, and standard deviation for the given sample data. Can the results be used to describe the variation among attractiveness ratings for the population of adult males?