W123 QUESTION TWO
a.) The following data represent the mathematics grades for a random sample of 12 freshmen
at a certain college along with their mathematics score in K. C.S. E. Additional information
on the absenteeism of these students has been recorded also.
Student
1
2
3
4.
5
6
7
8
9
10
11
12
K. C.S. E math Score 65 50 55 65
55 70 65 70 55 70
50
55
Classes missed
1
7
5
2
6
3
2
5
4
3
1
4
College Math Score
85 74 76 90 85 | 87 | 94 98 81
91
76
74
i.)
11.)
111.)
Compute and interpret the sample correlation coefficient between the KCSE
mathematics grade and the college math performance.
[3 marks]
What assumptions did you make in answering (1) above?
[2 marks]
Fit a multiple linear regression to predict the college score based in the K. C.S. E
grade and absenteeism-show all the necessary calculations. Interpret the slope
coefficients.
[8 marks]
Predict the college grade of a student whose K. C.S. E math score was 40 and has
missed 5 classes.
[2 marks]​

step-by-step explanation:

this is not a question

the answer to your question is c.)   volcanoes built the mountains and earthquakes tore them down.

step-by-step explanation:

the awnser is visionary

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.