For the five days from April 19-23, Sam counted the number of cups of caffeinated drinks he consumed (X) and the number of non-caffeinated drinks he consumed (Y). The following were the raw data for X and Y: Date X # caffeinated drinks Y = # non-caffeinated drinks %3! April 19 April 20 3 4 April 21 April 22 April 23 3 10 2 The mean and standard deviation for X (i.e., # of caffeinated drinks Sam drank) and the mean and standard deviation for Y (i.e., # of non-caffeinated drinks Sam drank) are: meanx = 6 meany = 3.6 %3D stdDevx = 2.45 stdDevy = 1.9 %3D Answer the following questions using the correlation reading: 1. Calculate the Pearson product-moment correlation coefficient, r, between X and Y for Sam. 2. Is this a positive or a negative correlation? 3. Is this a strong or a weak correlation?

For the five days from April 19-23, Sam counted the number of cups of caffeinated drinks he consumed (X) and the number of non-caffeinated drinks he consumed (Y). The following were the raw data for X and Y: Date X # caffeinated drinks Y = # non-caffeinated drinks %3! April 19 April 20 3 4 April 21 April 22 April 23 3 10 2 The mean and standard deviation for X (i.e., # of caffeinated drinks Sam drank) and the mean and standard deviation for Y (i.e., # of non-caffeinated drinks Sam drank) are: meanx = 6 meany = 3.6 %3D stdDevx = 2.45 stdDevy = 1.9 %3D Answer the following questions using the correlation reading: 1. Calculate the Pearson product-moment correlation coefficient, r, between X and Y for Sam. 2. Is this a positive or a negative correlation? 3. Is this a strong or a weak correlation?

Name: ViewHistory BookmarksWindowHelpWed AA ilearn.sfsu.eduCourse: PSY 0371
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Description: ViewHistory BookmarksWindowHelpWed AA ilearn.sfsu.eduCourse: PSY 0371-13 Psycholo.i https://ilearn.sfsu.edu/ay2021/p.O How To.. Calculate Pearson's C.E Calculator.net: Free Online Calc.D Correlation CoeFor the five days from April 19-23, Sam counted

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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Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.

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View
History Bookmarks
Window
Help
Wed A
A ilearn.sfsu.edu
Course: PSY 0371-13 Psycholo.
i https://ilearn.sfsu.edu/ay2021/p.
O How To.. Calculate Pearson's C.
E Calculator.net: Free Online Calc.
D Correlation Coe
For the five days from April 19-23, Sam counted the number of cups of caffeinated drinks he
consumed (X) and the number of non-caffeinated drinks he consumed (Y). The following were the
raw data for X and Y:
Date
X = # caffeinated drinks Y = # non-caffeinated drinks
April 19
April 20
April 21
April 22
April 23
3
4
5
3
10
7
The mean and standard deviation for X (i.e., # of caffeinated drinks Sam drank) and the mean and
standard deviation for Y (i.e., # of non-caffeinated drinks Sam drank) are:
meanx = 6
meany = 3.6
stdDevx = 2.45
stdDevy = 1.9
Answer the following questions using the correlation reading:
1. Calculate the Pearson product-moment correlation coefficient, r, between X and Y for Sam.
2. Is this a positive or a negative correlation?
3. Is this a strong or a weak correlation?
4. Draw a scatterplot for these data.
5. Calculate the coefficient of determination.
Answer the following questions using the regression reading:
28
tv
R
23
24
&
4.
5
6.
7
8
9.
3.

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