Moving Averages Example The table below represents test results for two students from last year’s 11M2. SurnameForenameTutorP1P2P3P4P5P6P7P8P9P10 ALIMubarikOB49305248354339364047.

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Presentation transcript:

Moving Averages Example The table below represents test results for two students from last year’s 11M2. SurnameForenameTutorP1P2P3P4P5P6P7P8P9P10 ALIMubarikOB BROMLEYDeanCB a) Obtain the three point moving average for each of these students. b) Plot the data onto a set of axes and draw a trend line for each student.

Example The list below represents the number of children absent from school for a fifteen-day period. Day Number Absent a) Why is a five-point moving average more suitable for this data? b) find the five-point moving average for this data. c) Plot the data onto a set of axes and draw the trend line.

Example The quarterly phone bills for one family over a three-year period are given in the table below. Year MonthMarJunSepDecMarJunSepDecMarJunSepDec Total Bill (£) a) Draw a graph for the data b) Calculate the four quarterly moving averages for the data. c) Plot the moving averages on the same graph as the original data, joining up the points with a dotted line. d) What is the trend in payments over this period?