Academic Skills Advice
Statistics Answers
Statistics 1:
1)
Mean =
Mode =
Median =
Range =
£56
£50
£55
£16
2)
Mean =
Mode =
Median =
Range =
200c
n/a
200c
60c
3)
Mean =
Mode =
Median =
Range =
4 letters
1 letter
3.5 letters
8 letters
4)
12.4 students per class.
5)
£23.75 per win.
Quartiles and Standard Deviation:
Question 1:
Quartiles = 3, 5, 8
Standard Deviation = 2.37
Question 2:
Quartiles = 7, 10, 15
Standard Deviation = 4.41 (4.36)
Question 3:
Quartiles = 9, 12, 24
Standard Deviation = 9.47 (9.48)
Statistics 2:
Sweets:
Mean =
Mode =
16.6 sweets
15 sweets
Cars:
Mean =
Mode =
38.6 cars
36 cars
Weight:
Mean =
Mode =
1.8 lbs
2 lbs
© H Jackson 2008 / Academic Skills
1
Statistics 3:
Sweets =
Cars =
Weight =
12
38
2
Statistics 4:
Salaries:
Mean =
Median =
Mode =
£28,703.70
£20,000-£30,000
£10,000-£20,000
Ages:
Mean =
Median =
Mode =
37.7 years
30-39 years
30-39 years
Summary Table:
A List
B Discrete
C Grouped
Mode
16
2
5-9
© H Jackson 2008 / Academic Skills
Mean
16.5
2.1
8.8
Median
16
2
5-9
Quartiles
15, 18
1, 3
S.D.
1.8
1.2
2