8)Hours of sleep per day vs. AgeHours of sleep per dayTN1020Age30Consider the scatterplot that shows ay = 0.0789x + 9.02 person's age and ther² = 0.606number of hours theysleep per night.40a) Briefly describe thetype and strengthof the correlation.b)To determine the number of hours that a 75-year-old would sleep, you would use(fill in the blank with interpolation or extrapolation).

The graphical representation of the scatter plot is given.The x-axis shows the person's age and the…

Answered: Consider the scatter plot that shows a…

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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What effect does an outlier have on a correlation coefficient? Would it increase, decrease or stay the same?
Warren wants to know if the amount of coffee that you drink is related to the number of hours that you stay awake. He recruits 50 participants using random sampling to report how much coffee they drank and the time of the day that they went to sleep. He then performs a correlation to determine the association between the amount of coffee that was consumed and the number of hours that they stayed awake. There was a statistically significant positive correlation between amount of coffee that participants drank and the number of hours that they stayed awake, r(49) = .82, p < .05, two-tailed, r2 = .08. This was a small effect – 8% of the variance in the amount of coffee drank is explained by hours that you stay awake (and vice versa).
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Consider the scatter plot that shows a person's age and the number of hours they sleep per night. a) Briefly describe the type and strength of the correlation.