1. Mathsercise-C Means Ready? Here we go!

2. Means The table shows how much TV 20 students watched in a week 1 Work out an estimate for the mean number of hours that students watched TV No. of hours 0 < h ≤ 208 Frequency 20 < h ≤ 40 40 < h ≤ 60 7 5 Answer Question 2 First you need two extra columns! Midpoint FxM The midpoint is half way through each class interval 10 30 50 80 210 250 To find the estimate of the mean, add the FxM up and divide by the 20 students 54020 ÷ = 27 hours

3. This table shows how much money 25 students had at school 2 Work out an estimate for the mean amount of money that each student has Means Amount (£) 0 < t ≤ 411 Frequency 4 < h ≤ 8 8 < h ≤ 12 3 11 Answer Question 3 Midpoint FxM 2 6 10 22 18 110 15025 ÷ = £6

4. 3 The table shows the number of flower bouquets delivered each day of the week Work out the 3-day moving average for this data Means DayMonTue Wed ThuFriSat No. 12813151419 Answer Question 4 3-day moving average means the average of each set of 3 days 12 = 33 ÷ 3 = 813 + + 11 121416 8 + 13 + 15 = 36 ÷ 3 = 12

5. The table shows the daily takings for an ice-cream salesman 4 Means DayMonTue Wed ThuFriSat (£) 50362490130156 Sun 264 Work out the 4-day moving average for this data Answer Start This time find the average of 4 values at a time 5070100160 Notice where these boxes are positioned!