Which of the following is not a measure of ‘centre’ ?

1.   ?    Mode
2.   ?    Range
3.   ?    Mean
4.   ?    Median

Which of the following is most likely to be affected by a very extreme data value?

1.   ?    Mean
2.   ?    Median
3.   ?    Mode
4.   ?    None of these

Calculate the mean of the following numbers: 2, 4, 5, 6, 10?

1.   ?    5
2.   ?    5.5
3.   ?    4.5
4.   ?    5.4

Calculate the median of the following numbers: 2, 4, 5, 6, 10?

1.   ?    5
2.   ?    5.5
3.   ?    4.5
4.   ?    5.4

What is the mode of the following set of data: 2,3,2,2,3,4,5,2,5,2,4,3?

1.   ?    3
2.   ?    2.5
3.   ?    2
4.   ?    3.08

If mean > median, what is likely to be the shape of the distribution?

1.   ?    Skewed to the right
2.   ?    Skewed to the left
3.   ?    Symmetric
4.   ?    Clustered closely together

Which of the following is not a measure of spread?

1.   ?    Standard deviation
2.   ?    Range
3.   ?    Variance
4.   ?    Sample mean

Calculate the sample variance of the following numbers: 2, 4, 5, 6, 10?

1.   ?    8.8
2.   ?    1.96
3.   ?    2.97
4.   ?    2.16

Without carrying out any calculations, decide which of the following data sets has the smallest standard deviation.

1.   ?    1, 5, 10
2.   ?    1, 2, 10
3.   ?    2, 4, 10
4.   ?    4 , 5, 10

In a class of students the mean mark awarded in a test was 45% with a standard deviation of 5%. Which of the following statements is true?

1.   ?    Exactly 75% of students scored between 35% and 55%
2.   ?    At least 75% of students scored between 35% and 55%
3.   ?    At most 11% of students scored over 55%
4.   ?    No student scored less than 30%