YEAR 9 MATHS: GROUPED FREQUENCY TABLESAN INTERACTIVE QWIZDOM LESSON

What does ‘f’ mean?

A) Midpoint

B) Frequency

C) Cumulative frequency

What does Σf mean?

A) FrequencyB) Cumulative FrequencyC) Total Frequency

What does ‘x’ mean?

A) MidpointB) Cumulative FrequencyC) Multiply

f)(fx

45.820169f)(f x

What have we just worked out?

A- Estimated MeanB- Modal ClassC- Class containing the median

What does Σf mean?

A) FrequencyB) Cumulative FrequencyC) Total Frequency

Which of these tells us that there are 25 people in total?

A) fx=25

B) f=25

C) Σf=25

If there are 25 people in total. Which one is the middle one?

(number of people + 1) 2

Which is the modal class?

Which class contains the median?

(Our middle number was 13)

What does Σf mean?

A) Total FrequencyB) Cumulative FrequencyC) Frequency