3. A researcher decides to investigate the relationship between an exposure (X) and anoutcome (Y). In order to do so, the researcher decides to collect information on a relevantvariable Z that may play a role in the relationship between X and Y. Which of thefollowing hypothetical scenarios describes interaction by the variable Z?A) Z is associated with an increase in both X and YB) Z is associated with only the exposureC) Z is associated with only the outcomeD) When Z is present, there is an increase in Y, and when Z is absent, there is a decrease in Y

Answered: Image /qna-images/answer/fdaa5461-0726-4e2f-89f3-a1f5b6364758.jpg

Answered: 3. A researcher decides to investigate…

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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A researcher hypothesized that an increase in stress at work was caused by an increase in consumption of alcohol. Further research found that increased consumption of alcohol was caused by increased work stress. This is an example of O al a reverse cause-and-effect relationship a presumed cause-and-effect relationship an accidental cause-and-effect c) relationship d) a cause-and-effect relationship O b)
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7) The following results are from data that were collected from a sample of Chicago Cubs baseball games. The dependent variable is ATTENDANCE, TEMP is a variable measuring the forecasted game-time temperature: WIN% is a variable measuring the winning percentage of the Cubs before the game is played, OPWIN% is a variable measuring the winning percentage of their opponent, WEEKEND is a dummy variable = 1 if the game is played on a weekend and = 0 if the game is played during a weekday, PROMOTION is a dummy variable = 1 if there is a promotion for the game (giving away something to those who attend the game) and = 0 if there is not a promotion, and WEEK*PROM is an interaction term equal to WEEKEND*PROMOTION. a) What is the predicted attendance if TEMP = 70, WIN% = 500, OPWIN% = 500, the game is played on a weekend and there is NO promotion? b) What is the predicted attendance if TEMP = 70, WIN% = 500, OPWIN% = 500, the game is played on a weekend and there is a promotion? c) Based on…
The question is at end of Merged document.jpg.
1) Estimate the difference between the ages of male and female respondents. (Q1=AGE, Q2=GENDER)
Course: StatisticsIn a study conducted, 3,000 people were surveyed, of which 2,400 work more than 40 hours a week and of these, it has been established that 70% suffer from some sleep disorder, while of those who work less than 40 hours, ONLY 35% suffer from some disorder. According to these data, it is correct to state that:I. 1,890 of respondents suffer from sleep disorders.II. 390 people are those who work less than 40 hours a week and do NOT suffer from sleep disorders.III. 37% of the people studied do NOT suffer from sleep disorders.Select one:a. Only Ib. Only IIc. Only IIId. I and IIIe. I, II and III
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2. Two fair dice are thrown. Let U be the minimum score of the two dice and let V be the maximum score of the two dice. a. Display f(u,v) in a table. b. Find the covariance and correlation between U and V.
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