10:17Class Size and Test ScoresAnswered Due on May 18, 11:59 PMNo Correct AnswerThe following graph summarizes results from astudy that recorded class sizes and averagestudent test scores. The figure suggests thatstudents in smaller class sizes get higher testscores. Does this mean that if we lowered classsizes we would get higher test scores? Briefly listone or two reasons why the relationship might be'spurious' rather than causal.Type your responseܕ ܬ ܕ ܘ ܘ ܬ ܪ ܪ ܪ ܪAverage Subject ScroeNational Average-15-20-10.0Figure 4: Class Size and Student Test ScoresClass Size & Student Test Scores-5.00.05.0Student to Teacher Ratio vs. National AverageTest Score = -0.9662"(Extra student per teacher)Correlation (r) -45%10.0Resubmit

The correlation shows the relationship b/w 2 variables.

Answered: The following graph summarizes results…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The data provides information on life expectancy and the number of televisions per thousand people in a sample of 22 countries, as reported by the world almanac and book of facts 2006 A. Describe the Direction and strength of the correlation between the two variables B. Because of the association between the variables, someone might mistakenly conclude that simply sending televisions to the countries with the lower life expectancies would cause their inhabitants to live longer. Comment on this argument and the reason televisions are likely associated with longer life expectancies C. In general, if two variables are strongly associated, does it follow there must be a cause and effect relationship between them? Explain
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Over the course of a year, you find a strong, positive correlation between ice cream sales and pool drownings in a medium-sized city. The mayor decides that to prevent drownings, ice cream will be banned within the city limits. However, you show the mayor that after controlling for the high temperature of each day, the correlation between ice cream sales and number of drownings drops to zero, because that relationship was actually: Group of answer choices direct. interactive. mediating. spurious.
8.
There is a strong correlation between the number of students graduating from SVS and the population of squirrels in York Region. The most likely type of causal relationship is:A.cause and effect B.accidental C.presumed D.reverse cause and effect
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If when measuring two quantitative variables on an individual, we find that increases in the first variable x correspond to decreases in the second variable y, we say that A. there is a positive association between the two variables. b. there is a negative association between the two variables. c. there is no correlation between the two variables. d. there is a cause-and-effect relationship between the two variables.
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When the values of x tend to increase while the values of y tend to decrease; we say that: Answer choices: a. there is a cause-and-effect relationship between the two variables. b. there is a negative correlation between the variables. c. there is no correlation between the two variables.

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