qwizdom year 9 maths - grouped frequency tables
DESCRIPTION
An interactive Maths lesson designed for use with Qwizdom Interactive voting systems.TRANSCRIPT
![Page 1: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/1.jpg)
YEAR 9 MATHS: GROUPED FREQUENCY TABLESAN INTERACTIVE QWIZDOM LESSON
![Page 2: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/2.jpg)
![Page 3: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/3.jpg)
![Page 4: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/4.jpg)
![Page 5: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/5.jpg)
What does ‘f’ mean?
A) Midpoint
B) Frequency
C) Cumulative frequency
![Page 6: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/6.jpg)
![Page 7: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/7.jpg)
What does Σf mean?
A) FrequencyB) Cumulative FrequencyC) Total Frequency
![Page 8: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/8.jpg)
What does ‘x’ mean?
A) MidpointB) Cumulative FrequencyC) Multiply
![Page 9: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/9.jpg)
![Page 10: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/10.jpg)
![Page 11: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/11.jpg)
![Page 12: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/12.jpg)
![Page 13: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/13.jpg)
f)(fx
![Page 14: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/14.jpg)
45.820169f)(f x
What have we just worked out?
A- Estimated MeanB- Modal ClassC- Class containing the median
![Page 15: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/15.jpg)
What does Σf mean?
A) FrequencyB) Cumulative FrequencyC) Total Frequency
![Page 16: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/16.jpg)
Which of these tells us that there are 25 people in total?
A) fx=25
B) f=25
C) Σf=25
![Page 17: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/17.jpg)
If there are 25 people in total. Which one is the middle one?
(number of people + 1) 2
![Page 18: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/18.jpg)
![Page 19: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/19.jpg)
Which is the modal class?
![Page 20: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/20.jpg)
![Page 21: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/21.jpg)
![Page 22: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/22.jpg)
![Page 23: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/23.jpg)
Which class contains the median?
(Our middle number was 13)
![Page 24: Qwizdom year 9 maths - grouped frequency tables](https://reader033.vdocuments.net/reader033/viewer/2022061221/54be3a944a79591b608b45d3/html5/thumbnails/24.jpg)
What does Σf mean?
A) Total FrequencyB) Cumulative FrequencyC) Frequency