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UNIT 7 STATISTICS

UNIT 7 STATISTICS. 7 .1 Data Analysis-Representation and Interpretation. 6 This accurate pie chart shows the age groups of a second group of adults taking part in the challenge. 44 of the adults were aged 21 to 30 years old. Find the number of adults that were aged 41 to 60 years old.

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UNIT 7 STATISTICS

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  1. UNIT 7 STATISTICS

  2. 7.1 Data Analysis-Representation and Interpretation 6 This accurate pie chart shows the age groups of a second group of adults taking part in the challenge. 44 of the adults were aged 21 to 30 years old. Find the number of adults that were aged 41 to 60 years old.

  3. 7.2Mean, Mode, Median, Rang, Quartiles, Perceniles, Standard Deviation 7 Alec has written down five numbers. The mean of these numbers is 7, the median is 5 and the mode is 4. The largest number is three times the smallest number. Find the five numbers.

  4. 7.3Cumulative Frequency Cumulative frequency The cumulative frequency graph shows the distribution of marks of 800 students in a Mathematics examination. (a) Find the median mark. (b) Find the interquartile range. (c) To be awarded a Grade A, a student has to get a mark of 78 or more. Estimate the number of students who are awarded a Grade A.

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