Multiple Choice Questions
Unit E3
Measures of Central Tendency
For each of these questions, choose the option (A, B, C or D) that is TRUE.
1

The range of a sample gives an indication of the

  • (A)
    way in which the values cluster about a particular point
  • (B)
    number of observations bearing the same value
  • (C)
    maximum variation in the sample
  • (D)
    degree to which the mean value differs from its expected value.
2

The observation which occurs most frequently in a sample is the

  • (A)
    median
  • (B)
    mean
  • (C)
    range
  • (D)
    mode
3

What is the median of the sample 5, 5, 11, 9, 8, 5, 8 ?

  • (A)
    5
  • (B)
    6
  • (C)
    8
  • (D)
    9

Items 4 - 5 refer to the information below.

The following scores were obtained by eleven footballers in a goal-shoot competition:

5 3 6 8 7 8 3 11 6 3 2
4

The modal score was

  • (A)
    3
  • (B)
    6
  • (C)
    8
  • (D)
    11
5

The median score was

  • (A)
    3
  • (B)
    6
  • (C)
    8
  • (D)
    11

Items 6 - 8 refer to the graph below.

6

How many packets were weighed?

  • (A)
    9
  • (B)
    14
  • (C)
    65
  • (D)
    92
7

What is the frequency of the median weight?

  • (A)
    7
  • (B)
    8
  • (C)
    12
  • (D)
    14
8

What is the modal weight?

  • (A)
    9.9 kg
  • (B)
    10.1 kg
  • (C)
    10.2 kg
  • (D)
    10.5 kg
9

The mean of ten numbers is 58. If one of the numbers is 40,
what is the mean of the other nine?

  • (A)
    18
  • (B)
    60
  • (C)
    162
  • (D)
    540
10

The mean of 11 numbers is 7. One of the numbers, 13, is deleted.
What is the mean of the remaining 10 numbers?

  • (A)
    7.7
  • (B)
    6.4
  • (C)
    6.0
  • (D)
    5.8
Total: - of marks
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