need help with 25 statistics problems sample problems given
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?
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