head to head: data handling dr j frost ([email protected]) last updated: 14 th december...
TRANSCRIPT
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Head Table
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Rear Table
Head to HeadYou are head to head with the person on your table.
You must circle or underline your answer to finalise it.
Once you finalise an answer, you can’t change it.
The first person with the correct answer wins.If both people get it wrong, just do a quick paper-scissors-rock to settle.If neither person answers, the person who previously won wins.
Winner moves up (as per left). Loser moves down.
Question 1
(Click above to reveal answer)
What is the lower quartile of the following numbers?
1 2 3 4 5 6 7 8 9
Answer: 2.5?
Question 2
a) What percentage of data is above the upper quartile?
b) What percentage of data is within the interquartile range?
Answer: a) 25% b) 50%
?
Question 3
You have four numbers.The median is 5, the mode 4 and the mean 7.What are the four numbers?
4 4 6 14?
Question 4
You have four numbers.The median is 5, the mode 4 and the mean 7.What are the four numbers?
4 4 6 14?
Question 5
Find the mean age (to 4dp).
10.9375?
Age Frequency10 411 912 3
Question 6
List two features you should compare when comparing box plots.
1. Median2. Either range or interquartile range.
?
Question 7
Find the mean age (to 2dp).
19.67 (condone 19.66)?
Age Frequency
10 < a ≤ 12 5
12 < a ≤ 20 10
20 < a ≤ 30 15
Question 8
Find the modal class.
20 < a ≤ 30?
Age Frequency
10 < a ≤ 12 5
12 < a ≤ 20 10
20 < a ≤ 30 15
Question 9
If I were to draw a pie chart to represent this data,what angle is needed for the sector labelled “Cat”?(Give answer to nearest degree)
213°?
Animal FrequencyDog 7Cat 13Goose 2
20
18
16
14
12
10
8
6
4
2
0 10 20 30 40
Time (minutes)
Cum
ulati
ve F
requ
ency
Here is a cumulative frequency graph showing times.What is the interquartile range of the times?
35 – 15 = 20?
Question 10
If you were to plot a cumulative frequency graph of the following data, list the coordinates of the three leftmost points the graph.
Question 11
Age Frequency
10 < a ≤ 12 5
12 < a ≤ 20 10
20 < a ≤ 30 15
(10, 0), (12, 5), (20, 15) ?
If you were to plot a frequency polygon of the following data, list the coordinates of the three points.
Question 12
Weight (in kg) Frequency
10 < w ≤ 18 6
18 < w ≤ 26 11
26 < w ≤ 34 1
(14, 6), (22, 11), (30, 1)?
Question 13
What is the median class interval?
20 < a ≤ 30?
Age Frequency
10 < a ≤ 12 6
12 < a ≤ 20 12
20 < a ≤ 30 8
30 < a ≤ 50 14