Year 8 Statistics

What is the mean of the following data set:

2, 4, 5, 9, 11, 12, 12, 15

• 10

• 13

• 8.75

• 12

Which class intervals would be most appropriate if you were to create a tally and frequency table for the following data:

9, 27, 29, 33, 47, 54, 71, 88, 89, 94, 96, 98

• Intervals of 5

• Intervals of 100

• Intervals of 1000

• Intervals of 10

What is the range?

• The sum of the smallest and largest number

• The number in the middle

• The difference between the largest and smallest number

• A place to play golf

Determine the outlier of the following data set:

17, 23, 8, 33, 187, 19, 27, 19, 29, 14, 20

• 8

• 187

• 19

• There are not outliers

Recording the height of every year 8 student involves categorical data.

• True

• False

This table and frequency table uses class intervals of:

• 9

• 8

• 41-49

• There are no class intervals

The modal class of this tally and frequency table is:

• 50-58

• 68-76

• 6

• 50-58 AND 68-76

How do you find the median of a data set that has two middle numbers?

• You pick the higher middle number

• You pick the lower middle number

• Subtract the two middle numbers and divide by 2

• Add the two middle numbers and divide by 2

Calculate the median of this data set:

3, 3, 4, 5, 7, 8, 8, 12

• 8

• 6

• 3 AND 8

• The middle

What form of data collection would we use to record Brisbane residents' favourite fast food chain?

• Survey

• Census

• Sample Size

• None of the above