A researcher studying the prevalence of alcohol use among seniors in a particular high school asked 45 of these youths how many drinks they had consumed in the last week.
Convert the distribution containing four class intervals, and (a) determine the size of the
class intervals, (b) indicate the upper and lower limits of each class interval, (c) identify the
midpoint of each class interval, (d) find the percentage for each class interval, (e) find the
cumulative frequency of each class interval, and (f) find the cumulative percentage for
each class interval.
Number of Drinks f
7 5
6 9
5 6
4 11
3 4
2 3
1 3
0 4
N = 45
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From the following table representing family structure for black and white children in a particular community,
find (a) the percent of black children having two-parent families, (b)
the percent of white children having two-parent families, (c) the proportion of black children
having two-parent families, and (d) the proportion of white children having two-parent
families.
Family Structure Black White
One parent 53 59
Two parents 60 167
Total 113 226
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From the following table illustrating the handedness of a random sample of men and women,
find (a) the percent of men who are left-handed, (b) the percent of women who
are left-handed, (c) the proportion of men who are left-handed and (d) the proportion of
women who are left-handed. (e) What can you conclude about gender and the prevalence
of left-handedness?
Handedness Male Female
Left-handed 15 8
Right-handed 86 114
Total 101 122
What would be an ideal response?
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