Faculty and Students The number of faculty and the number of students are shown for a random selection of small colleges. Is there a significant relationship between the two variables? Switch x and y and repeat the process. Which do you think is really the independent variable? Faculty 99 110 113 116 138 174 220 Students 1353 1290 1091 1213 1384 1283 2075

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#21
Exercises 20 and 38 in Section 10-2.)
21. Faculty and Students The number of faculty and the
number of students are shown for a random selection of
small colleges. Is there a significant relationship between
the two variables? Switch x and y and repeat the process.
Which do you think is really the independent variable?
Faculty
99
110 113 116 138 174 220
Students
1353 1290 1091 1213 1384 1283 2075
Source: World Almanac.
(The information in this exercise will be used for
Exercises 21 and 36 in Section 10–2.)
22. Life Expectancies Is there a relationship between
the life expectancy for men and the life expectancy
for women in a given country? A random sample of
nonindustrialized countries was selected, and the life
expectancy in years is listed for both men and women.
Are the variables linearly related?
Men
59.7
72.9 41.9
46.2
50.3
43.2
Women
63.8
77.8
44.5
48.3
54.0
43.5
Source: World Almanac.
(The information in this exercise will be used for
Exercise 22 in Section 10-2.)
23. Literacy Rates For the same countries used in
Exercise 22, the literacy rates (in percents) for both
men and women are listed. Is there a linear relationship
Transcribed Image Text:Exercises 20 and 38 in Section 10-2.) 21. Faculty and Students The number of faculty and the number of students are shown for a random selection of small colleges. Is there a significant relationship between the two variables? Switch x and y and repeat the process. Which do you think is really the independent variable? Faculty 99 110 113 116 138 174 220 Students 1353 1290 1091 1213 1384 1283 2075 Source: World Almanac. (The information in this exercise will be used for Exercises 21 and 36 in Section 10–2.) 22. Life Expectancies Is there a relationship between the life expectancy for men and the life expectancy for women in a given country? A random sample of nonindustrialized countries was selected, and the life expectancy in years is listed for both men and women. Are the variables linearly related? Men 59.7 72.9 41.9 46.2 50.3 43.2 Women 63.8 77.8 44.5 48.3 54.0 43.5 Source: World Almanac. (The information in this exercise will be used for Exercise 22 in Section 10-2.) 23. Literacy Rates For the same countries used in Exercise 22, the literacy rates (in percents) for both men and women are listed. Is there a linear relationship
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