Online Homework
Mean from frequency tables
Thomas Rotherham Sixth Form College
Adnan I
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Q1
u w
Q2 - Girls and boys
This table shows the number of merits
received one week by a group of
students at Dunwell School.
Number
of merits
Number
of girls
Number
of boys
0
4
4
Q2
Find the mean number of merits
received by the girls and by the boys.
Round your answer to 1 d. p.
1
8
8
0
2
1
11
13
9
Girls:
merits
[4]
3
15
16
Boys :
merits
[4]
4
12
10
Who did better on average?
5
7
9
6
0
2
Girls
Boys
[1]
Total
They did
equally well
3
14
Marl

Max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.