This web page contains a live and functional spreadsheet created with
SpreadsheetConverter
. Please enable JavaScript in your web browser for the live calculations to work properly.
Homework 7 Statistics 1
Your Score:
Q1)
The mean score of the 54 students in Group 1 on a maths exam was 81%.
The mean score of the 39 students in Group 2 on the same exam was 75%.
What was the mean score for the maths exam for all students in Groups 1 and 2?
%
Q2)
What is the mean and variance of the following list:
3.4, 4.7, 6.7, 7.3, 2.5, 9.4, 6.3, 7.4, 3.7, 8.8
mean =
var =
Q3)
Calculate all the required statistics from the table below:
Lower
Upper
f
m
f m
f m
2
Cf
0
10
4
10
20
5
20
30
8
30
40
13
40
50
15
50
60
22
60
80
36
80
100
47
100
150
24
150
300
12
Q1 =
Median =
Mean =
Q3 =
IQR =
Var =
SD =
Q4)
x
y
19
35
38
57
44
64
20
41
70
88
73
87
15
36
34
51
60
77
79
100
11
34
54
70
The gradient of the regression line is:
The y intercept of the regression line is:
The equation of the regression line is:
y =
x +
The model predicts the value of y when x = 24 is:
Reset
Print