Modal Class Exercise

The masses, in grams, of 100 potatoes are shown in the table below: Mass (m) gramsFrequency 0 < m  < m  < m  < m  < m  < m  Calculate the mean mass of potatoes and work out the modal class and median mass. Add another column for ? and another row for ? Mid mass x frequency Totals

Mass (m) grams FrequencyMid mass x frequency 0 < m  < m  < m  < m  < m  < m  Totals Mean Modal class Median Mean is Grams How would we find out the mean? Divide by

Mass (m) grams FrequencyMid mass x frequency 0 < m  < m  < m  < m  < m  < m  Totals Modal class What does mode mean? So which is the most or biggest frequency? 28 Which class does the 28 appear? 40 < m  60

Mass (m) grams FrequencyMid mass x frequency 0 < m  < m  < m  < m  < m  < m  Totals Median What does median mean? What is the middle frequency? 50 Working down from the top, where would the 50th value be found? What mass class is this in? 60 < m  80

Now make the Cumulative Frequency diagram AND box plot. Mass (m) grams FrequencyMid mass x frequency 0 < m  < m  < m  < m  < m  < m  Totals Cumulative Frequency

Min Max LQ M UQ