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WGU C955 - Module 6: Correlation & Regression Quiz with Verified Answers | Latest 2025/2026

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Consider the following equation, y+8x=−2 . What is the y -intercept of a line with this equation? a −2 b 2 c 8 d −8 -2 Using the scatterplot below, what type of correlation is suggested? Scatterplot displaying data points distributed from lower left to upper right. Points are relatively close to one another. a No correlation b Weak negative positive c Moderate positive d Strong negative Moderate positive When constructing a line of best fit, what must be minimized? a The vertical distances between that line and the data points. b The length of the line. c The correlation coefficient. d The p-value The vertical distances between that line and the data points. Which correlation coefficient suggests the strongest correlation? a −0.9 b −0.3 c 0.1 d 0.8 -0.9 The following table shows the performance of two airlines in two different cities. Is there a Simpson's Paradox occurring? Airline A Delayed Flights Airline A % Delayed Airline B Delayed Flights Airline B % Delayed Total Delayed Total % Delayed Los Angeles 62/559 11.10% 460/3450 13.30% 522/4009 13% San Diego 46/396 11.60% 30/221 13.60% 76/617 12.30% a No, because an equal number of flights departed from each city. b No, because it's clear from the data that Los Angeles has a higher rate of delayed flights. c Yes, because the delayed flight rates were different for each city. d Yes, because while Los Angeles has a greater overal rate of delayed flights, San Diego has a greater rate of delayed flights when looking at the individual airlines. Yes, because while Los Angeles has a greater overal rate of delayed flights, San Diego has a greater rate of delayed flights when looking at the individual airlines.

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WGU C955 - Module 6: Correlation & i.- i.- i.- i.- i.- i.- i.-




Regression Quiz with Verified Answers. i.- i.- i.- i.- i.-




Consider the following equation, y+8x=−2 . What is the y -intercept of a
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



line with this equation?
i.- i.- i.-




a −2
i.- i.-




b2i.- i.-




c8
i.- i.-




d −8
i.- i.-i.- i.- -2


Using the scatterplot below, what type of correlation is suggested?
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



Scatterplot displaying data points distributed from lower left to upper
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



right. Points are relatively close to one another.
i.- i.- i.- i.- i.- i.- i.-




a No correlation
i.- i.-




b Weak negative positive
i.- i.- i.-




c Moderate positive
i.- i.-




d Strong negative
i.- i.- i.-i.- i.- Moderate positive i.-




When constructing a line of best fit, what must be minimized?
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-




a The vertical distances between that line and the data points.
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-

,b The length of the line.
i.- i.- i.- i.- i.-




c The correlation coefficient.
i.- i.- i.-




d The p-value
i.- i.- i.-i.- i.- The vertical distances between that line and the
i.- i.- i.- i.- i.- i.- i.- i.-



data points. i.-




Which correlation coefficient suggests the strongest correlation?
i.- i.- i.- i.- i.- i.-




a −0.9
i.- i.-




b −0.3
i.- i.-




c 0.1
i.- i.-




d 0.8
i.- i.-i.- i.- -0.9


The following table shows the performance of two airlines in two
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



different cities. Is there a Simpson's Paradox occurring?
i.- i.- i.- i.- i.- i.- i.-




Airline A Delayed Flights Airline A % Delayed Airline B Delayed Flights
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



Airline B % Delayed Total Delayed Total % Delayed
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Los Angeles 62/559 11.10% 460/3450 13.30% 522/4009 13%
i.- i.- i.- i.- i.- i.- i.- i.-




San Diego 46/396 11.60% 30/221 13.60% 76/617 12.30%
i.- i.- i.- i.- i.- i.- i.- i.-




a No, because an equal number of flights departed from each city.
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-




b No, because it's clear from the data that Los Angeles has a higher rate
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



of delayed flights.
i.- i.-




c Yes, because the delayed flight rates were different for each city.
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-

, d Yes, because while Los Angeles has a greater overal rate of delayed
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



flights, San Diego has a greater rate of delayed flights when looking at
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



the individual airlines.
i.- Yes, because while Los Angeles has a i.- i.-i.- i.- i.- i.- i.- i.- i.- i.- i.-



greater overal rate of delayed flights, San Diego has a greater rate of
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



delayed flights when looking at the individual airlines.
i.- i.- i.- i.- i.- i.- i.-




A restaurant owner wants to see if she can use low temperatures to
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boost soup sales at her restaurant. To study a possible relationship
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between temperature and soup sales, she collects data throughout the
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year on the temperature of a given day (ranging between 20 degrees F
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and 90 degrees F) and the amount of soup sold that day. She performs
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



a linear regression and comes up with a least squares regression line of
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y=−1.64x+176.6 with r=−0.89 where x is the temperature (in degrees F) i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



and y is the number of daily soup sales. What is the correct
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



interpretation of the slope of the regression line? i.- i.- i.- i.- i.- i.- i.-




a For every increase in one degree Fahrenheit, there is a corresponding
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



increase of 1.64 sales of soup. i.- i.- i.- i.- i.-




b For every increase of one degree Fahrenheit, there is a corresponding
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



increase of 176.6 sales of soup. i.- i.- i.- i.- i.-




c For every increase in one degree Fahrenheit, there is a corresponding
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



decrease of 1.64 sales of soup. i.- i.- i.- i.- i.-




d For every incre
i.- For every increase in one degree Fahrenheit,
i.- i.- i.-i.- i.- i.- i.- i.- i.- i.- i.- i.-



there is a corresponding decrease of 1.64 sales of soup.
i.- i.- i.- i.- i.- i.- i.- i.- i.-




A researcher wants to know if there was a relationship between
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-



student age and desire to complete a college degree. To answer this
i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.- i.-
€10,07
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