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1. For the following pair of variables, which more naturally is the response variable and which is the explanatory variable?
College grade point average (GPA) and High school GPA
2. Use the points on the right to answer the following questions.
a. Find the scores on x and y for each point. Comment on how zx and zy relate to each other for each point.
b. Compute r using the z-scores for the four observations. Is this the value you expected to get for r? Why?
3. Match the scatterplots to the right with the correlation values.
1. r=0.9
2. r=0.58
3. r=0
4. The data on the right shows the percent of the population in a country that uses cell phones and their GDP. Let y = cell-phone use x = GDP.
a. The graph on the right shows a scatterplot. Describe this plot in terms of the variability of cell-phone use values for nations close to 0 on GDP.
Identify the nation that has less cell-phone use than you would expect, given their GDP.
b. Give the x- and y- coordinates for the nation that has the highest cell-phone use.
Give the x- and y- coordinates for the nation that has the highest GDP.
c. Would the correlation be positive , or negative? Explain.
d. Suppose you considered the correlation only for those nations having GDP above 1 Would the correlation be stronger, or weaker, than for all the countries?
5. For a table of national information it is found that the correlation with Internet use is 0.717 for GDP, 0.533 for cell-phone use, 0.539 for literacy, -0.859 for fertility, and 0.647 for CO2 Emissions.
a. Which variable has the strongest linear association with internet use?
b. Which variable has the weakest linear association with internet use?
c. Interpret the correlation between Internet use and fertility (the mean number of children per adult woman).
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1. For the following pair of variables, which more naturally is the response variable and which is the explanatory variable?
College grade point average (GPA) and High school GPA
2. Use the points on the right to answer the following questions.
a. Find the scores on x and y for each point. Comment on how zx and zy relate to each other for each point.
b. Compute r using the z-scores for the four observations. Is this the value you expected to get for r? Why?
3. Match the scatterplots to the right with the correlation values.
1. r=0.9
2. r=0.58
3. r=0
4. The data on the right shows the percent of the population in a country that uses cell phones and their GDP. Let y = cell-phone use x = GDP.
a. The graph on the right shows a scatterplot. Describe this plot in terms of the variability of cell-phone use values for nations close to 0 on GDP.
Identify the nation that has less cell-phone use than you would expect, given their GDP.
b. Give the x- and y- coordinates for the nation that has the highest cell-phone use.
Give the x- and y- coordinates for the nation that has the highest GDP.
c. Would the correlation be positive , or negative? Explain.
d. Suppose you considered the correlation only for those nations having GDP above 1 Would the correlation be stronger, or weaker, than for all the countries?
5. For a table of national information it is found that the correlation with Internet use is 0.717 for GDP, 0.533 for cell-phone use, 0.539 for literacy, -0.859 for fertility, and 0.647 for CO2 Emissions.
a. Which variable has the strongest linear association with internet use?
b. Which variable has the weakest linear association with internet use?
c. Interpret the correlation between Internet use and fertility (the mean number of children per adult woman).
BSHS 382 Week 4 Quiz Click Here to Buy the Tutorial http://www.bshs382paper.com/product-35-BSHS-382-Week-4-Quiz For More Course Tutorials Visit www.bshs382paper.com 1. For the following pair of variables, which more naturally is the response variable and which is the explanatory variable? College grade point average (GPA) and High school GPA 2. Use the points on the right to answer the following questions. a. Find the scores on x and y for each point. Comment on how zx and zy relate to each other for each point. b. Compute r using the z-scores for the four observations. Is this the value you expected to get for r? Why? 3. Match the scatterplots to the right with the correlation values. 1. r=0.9 2. r=0.58 3. r=0 4. The data on the right shows the percent of the population in a country that uses cell phones and their GDP. Let y = cell-phone use x = GDP. a. The graph on the right shows a scatterplot. Describe this plot in terms of the variability of cell-phone use values for nations close to 0 on GDP. Identify the nation that has less cell-phone use than you would expect, given their GDP. b. Give the x- and y- coordinates for the nation that has the highest cell-phone use. Give the x- and y- coordinates for the nation that has the highest GDP. c. Would the correlation be positive , or negative? Explain. d. Suppose you considered the correlation only for those nations having GDP above 1 Would the correlation be stronger, or weaker, than for all the countries?
<strong>BSHS</strong> <strong>382</strong> <strong>Week</strong> 4 <strong>Quiz</strong><br />
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http://www.bshs<strong>382</strong>paper.com/product-35-<strong>BSHS</strong>-<strong>382</strong>-<strong>Week</strong>-4-<strong>Quiz</strong><br />
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www.bshs<strong>382</strong>paper.com<br />
1. For the following pair of variables, which more naturally is the response variable and<br />
which is the explanatory variable?<br />
College grade point average (GPA) and High school GPA<br />
2. Use the points on the right to answer the following questions.<br />
a. Find the scores on x and y for each point. Comment on how zx and zy relate to each<br />
other for each point.<br />
b. Compute r using the z-scores for the four observations. Is this the value you expected to<br />
get for r? Why?<br />
3. Match the scatterplots to the right with the correlation values.<br />
1. r=0.9<br />
2. r=0.58<br />
3. r=0<br />
4. The data on the right shows the percent of the population in a country that uses cell<br />
phones and their GDP. Let y = cell-phone use x = GDP.<br />
a. The graph on the right shows a scatterplot. Describe this plot in terms of the variability<br />
of cell-phone use values for nations close to 0 on GDP.<br />
Identify the nation that has less cell-phone use than you would expect, given their GDP.<br />
b. Give the x- and y- coordinates for the nation that has the highest cell-phone use.<br />
Give the x- and y- coordinates for the nation that has the highest GDP.<br />
c. Would the correlation be positive , or negative? Explain.<br />
d. Suppose you considered the correlation only for those nations having GDP above 1<br />
Would the correlation be stronger, or weaker, than for all the countries?
5. For a table of national information it is found that the correlation with Internet use is<br />
0.717 for GDP, 0.533 for cell-phone use, 0.539 for literacy, -0.859 for fertility, and 0.647 for<br />
CO2 Emissions.<br />
a. Which variable has the strongest linear association with internet use?<br />
b. Which variable has the weakest linear association with internet use?<br />
c. Interpret the correlation between Internet use and fertility (the mean number of children<br />
per adult woman).
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