Statistics

How many more people have purple for a favourite colour than red?

• 3
• 5
• 7
• 9

How many more people said Comedy than Thriller as their favourite type of film?

• 2

• 5

• 8

• 10

Russ compared the heights of two basketball teams. He recorded the data as shown.

Which of the following is an inference that could be made from this data?

• 25% of team 1 is shorter than team 2

• 75% of team 2 is taller than team 1

• 50% of the teams are the exact same height

• 25% of team 1 is the same height as 50% of team 2

The heights of two groups of students in different grades are shown in the box-and-whisker plot. Which statement CORRECTLY compares the two data sets?

• The maximum of Group A is greater than the maximum of Group B.

• The minimum of Group A is greater than the minimum of Group B.

• The median of Group B is greater than the median of Group A.

• The median of Group A is greater than the median of Group B.

This fractile divides the set into 4 equal parts.

• Median

• Quartile

• Quantile

• Decile

• Percentile

What is the median height (in cm) of the following:
140, 148, 150, 152, 155, 157, 159, 160, 161, 164, 165, 166

• 157 cm

• 158 cm

• 159 cm 

• none of these

The summative scores of selected Grade 10 students are:

9, 12, 19, 10, 26, 24, 17, 15, 30, 17, 5, 9, 15, 8, 17, 12, 15, 20, 21

How many students got a score below 10?

• 4

• 5

• 6

• 7

The lower quartile is equal to

• 50th percetile

• 25th percentile

• 2nd decile

• 3rd quartile

Find the mean of the data: 15, 5,8,12,5,9,4,10,2,11

• 8.1

• 8.5

• 7

• 6

What is the interquartile range of 91, 92, 112, 112, 121, 126, 142, 144

• 32

• 51

• 35

• 21