Y9 Booster Lesson 14. Objectives – by the end of the lesson you should.. Be able to make a statement that compares two sets of data Use key words in a.

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Presentation transcript:

Y9 Booster Lesson 14

Objectives – by the end of the lesson you should.. Be able to make a statement that compares two sets of data Use key words in a comparison statement Refer to values in the data Give possible reasons

What is meant by: What is the mode, median, mean and range of this set of numbers? How did you work out your answers? What is the mode, median, mean and range of this set of numbers? How did you work out your answers?

Sam has six cards, each has a positive whole number printed on it. Four of the cards have the number 10. Without knowing the numbers on the other two cards can you give the value of the median, mode and range? 10 The six cards have a mean of 10. What could the other two cards be ? Discuss possible answers. Which answer would give the greatest range? Why? ?? Can you find the value of the other two cards if the six have a mode of 6, a mean of 10 and a range of 6. Justify your answer.

Handling data M14.1 This chart shows the lengths of 100 words in two different newspaper passages. Compare the two distributions. Broadsheet newspapers have significantly more longer words i.e of 7 or 8 letters, than tabloid newspapers. Broadsheet and tabloid newspapers have similar numbers of shorter words i.e. of 2 or 3 letters. The modal length of word is 3 letters for both types of newspaper. Why? Compare – find similarities and differences.

Handling data M14.2 Interpret the data from this chart Include a comparison Draw on specific values from the data Indicate, greater more or less Indicate whether the difference is slight or significant Give a possible reason for the finding

Handling data: ‘Teachers’ M14.3 A newspaper predicts what the ages of secondary-school teachers will be in six years time. They print this chart. (a) The chart shows 24% of male teachers will be aged 40 to 49. About what percentage of female teachers will be aged 40 to 49? (b)About what percentage of female teachers will be aged 50+?

(c)The newspaper predicts there will be about male teachers aged 40 to 49. Estimate the number of male teachers that will be aged 50+. (d)Assume the total number of male teachers will be about the same as the total number of female teachers. Use the chart to decide which of these statements is correct. Generally, male teachers will tend to be younger than female teachers. Generally, female teachers will tend to be younger than male teachers. Explain how you used the chart to decide.

Objectives – how have we done? Be able to make a statement that compares two sets of data Use key words in a comparison statement Refer to values in the data Give possible reasons

Thank you for your attention