There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the following for both variables:(a.) expected value(b.) standard deviation(c.) covariance(d.) correlation coefficient Problem solving:There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the followingfor both variables:(a.) expected value(b.) standard deviation(с.) сovarianсe(d.) correlation coefficientX=1X=2X=3Y=12619Y=2736315Y=3122424

Solution Given that The number of students n=265 The frequency table of X and Y is given Firstly…

There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the following for both variables: (a.) expected value (b.) standard deviation (c.) covariance (d.) correlation coefficient

There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the following for both variables: (a.) expected value (b.) standard deviation (c.) covariance (d.) correlation coefficient

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the following for both variables:

(a.) expected value

(b.) standard deviation

(c.) covariance

(d.) correlation coefficient

Problem solving:
There were 265 students who participated in a study collected at random. The distribution of frequencies is seen on the table. Calculate the following
for both variables:
(a.) expected value
(b.) standard deviation
(с.) сovarianсe
(d.) correlation coefficient
X=1
X=2
X=3
Y=1
26
19
Y=2
73
63
15
Y=3
12
24
24

Definition Definition Statistical measure used to assess the strength and direction of relationships between two variables. Correlation coefficients range between -1 and 1. A coefficient value of 0 indicates that there is no relationship between the variables, whereas a -1 or 1 indicates that there is a perfect negative or positive correlation.

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