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
What would be an ideal response?
a. Number of Drinks f
6-7 14
4-5 17
2-3 7
0-1 7
N = 45
7.5 6.5
2
i U L = ?
= ?
=
b. 5.5-7.5, 3.5-5.5, 1.5-3.5, -.5-1.5
c. m : 6.5, 4.5,2.5,0.5
d.
( )
( )
( )
( )
Percentage for class interval 6 7 14 / 45 *100 31.1%
Percentage for class interval 4-5 17 / 45 *100 37.8%
Percentage for class interval 2-3 7 / 45 *100 15.6%
Percentage for class interval 0-1 14 / 45 *100 15.6%
? = =
= =
= =
= =
e. cf: 45,31,14,7
f. c%: 100.0, 69.0, 31.2,15.6
You might also like to view...
Examples of technology that can greatly impact our understanding of the world are:
a) The internet b) Tracking devices c) “Big data” d) All of the above
Outline the two federal policy initiatives, the Family and Medical Leave Act of 1993 and the National Family Caregiver Support Program of 2000, aimed at supporting families
What will be an ideal response?
Private charities have played a major role in helping the homeless
Indicate whether the statement is true or false
It is not important for the worker and client to agree on the rules that will govern their work together, because the worker can inform the client of the rules as the relationship develops
A. True B. False