1. Lane et al,pg 62 #3:
If you are told only that you scored in the 80th percentile, do you know from that description exactly how it was calculated? Explain.
2. Lane et al,pg 63 #10:
For the numbers 1, 2, 4, 16, compute the following:
ΣX =
ΣX² =
(ΣX)² =
3. Lane et al,pg 64 #17.
What is the independent variable of this experiment?
How many levels does it have?
4. Lane et al,pg 64 #18.
What is the dependent variable?
On what scale (nominal, ordinal, interval, ratio) was it measured?
5. Illowsky et al,pg 53; #50.
What is the population she is interested in?
a. all Lake Tahoe Community College students
b. all Lake Tahoe Community College English students
c. all Lake Tahoe Community College students in her classes
d. all Lake Tahoe Community College math students
6. Illowsky et al,pg 53; #52.
The instructor's sample produces a mean number of days absent of 3.5 days.
This value is an example of a:
a. parameter.
b. data.
c. statistic.
d. variable.
7. Illowsky et al,pg 54; #72.
A study was done to determine the age, number of times per week, and the duration (amount of time) of residents using a local park in San Jose. The first house in the neighborhood around the park was selected randomly and then every eighth house in the neighborhood around the park was interviewed. The sampling method was:
a. simple random
b. systematic
c. stratified
d. cluster
8. Illowsky et al,pg 56; #80.
a. Fill in the blanks in Table 1.33.
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# of Courses
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Frequency
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Relative Frequency
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Cumulative Relative Frequency
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1
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|
|
|
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2
|
|
|
|
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3
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b. What percent of students take exactly two courses?
c. What percent of students take one or two courses?
9. Illowsky et al,pg 57; #84.
a. What is the frequency for CEO ages between 54 and 65?
b. What percentage of CEOs are 65 years or older?
c. What is the relative frequency of ages under 50?
d. What is the cumulative relative frequency for CEOs younger than 55?
e. Which graph shows the relative frequency and which shows the cumulative relative frequency?
10. Illowsky et al,pg 59; #90.
a. What percent of the students surveyed do not have a computer at home?
b. About how many students in the survey live at least 16 miles from campus?
c. If the same survey were done at Great Basin College in Elko, Nevada, do you think the percentages would be the same? Why?