Average for grouped frequency table

Which is the 1st class?

• 140 ≤ h < 150

• 150 ≤ h < 160

• 160 ≤ h < 170

• 170 ≤ h < 180

What is each class width?

• 140 – 180

• 51

• 6 – 21

• 10

For this data, the total frequency is:

• 6

• 7

• 10

• 20

For this data, the median would be the:

• 10th value

• 11th value

• in between the 10th and 11th value

• 10.5

The median for this set of data is:

• 1

• 3

• 5

• 8

For this data, the median is

• not possible

• Between a Budgie and a Hamster

• 4.5

• a mistake

To estimate the mean, we should use

• each class' lower bound

• each class' upper bound

• each class

• each class' middle value

Which is the modal class?

• 140 ≤ h < 150

• 150 ≤ h < 160

• 160 ≤ h < 170

• 170 ≤ h < 180

Why can we only estimate the mean for this given data?

• There's no need being precise

• We don't have the raw data

• Mr Chang is lazy

• We may have counted the students incorrectly

For this data, how many data points are there?

• 4 children

• 51 children

• 180 cm

• 140 cm