Answer the following Essay Type Questions Find the value of

Answer the following Essay Type Questions

Find the value of the liner correlation coefficient r, and then find the regression equation of the following table.

A company manager wishes to test a union leader’s claim that absences occur on the different week days with the same frequencies. Test this claim at a = 0.05, where the following data have been compiled

Day

Sun

Mon

Tue

Wed

Thru

Absents

3) Evaluate the F test statistic for the following data, where n=4 for each sample

Group 1

Group 2

Group 3

Group 4

Sample Mean

6.6

3.4

3.0

1.2

Sample Variance

5.35

1.35

2.5

2.65

Solution

Question 1

Pearson correlation of x and y = 0.789

now to fit the regression equation is,

y=a+bx

where a and b are parameter are to be estimated by the method of least square hence we get

The regression equation is
y = 55.4 + 3.42 x

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