Finding the mean from a frequency g. the following table shows the table mean height of 30 students in our class nd the mean height We first need to make sure Height (x cm) 130 - 140 140 150 Frequency 5 7 eaR 150 the 160 calculator 160 170is CL 170 180of all previous content 8 6 4 Finding the mean from a frequency Height (x cm)

130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7 8 6 4 We first need to make sure the calculator is CLeaR of all previous content Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160

160 170 170 180 Frequency 5 7 8 6 4 We want to clear Finding the mean from a frequency All Height (x cm) 130 - 140 140 150 150 160 160 170 170 180

Frequency 5 7 8 6 4 Yes Reset all Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7

8 6 4 We really do agree AC Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7 8 6

4 We need to SET UP the Calculator into STATS to switch ON the Frequency option Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7 8 6 4 We need to SET UP the Calculator into STATS

to switch ON the Frequency option Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7 8 6 4 We need to SET UP the Calculator into STATS to switch ON the Frequency option Finding the mean from a frequency

Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5 7 8 6 4 We need to SET UP the Calculator into STATS to switch ON the Frequency option Finding the mean from a frequency Height (x cm) 130 - 140

140 150 150 160 160 170 170 180 Frequency 5 7 8 6 4 We need to SET UP the Calculator into STATS to switch ON the Frequency option Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160

160 170 170 180 Frequency 5 7 8 6 4 We want the calculator in STATS mode Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180

Frequency 5 7 8 6 4 We want the calculator in STATS mode Finding the mean from a frequency Height (x cm) 130 - 140 140 150 150 160 160 170 170 180 Frequency 5

7 8 6 4 We only have 1 variable Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 155 165 175 140 150 150 160 160 170 170 180

7 8 6 4 We need to put in the mid interval values of the first row Pressing = After each one Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150 150 160 155 160 170

165 170 180 175 7 8 6 4 We need to enter the mid interval values of the first row Pressing = After each one Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150 155

150 160 160 165 170 7 8 6 175 170 180 4 We need to enter the mid interval values of the first row Pressing = After each one Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150

155 150 160 160 165 170 7 8 6 175 170 180 4 We need to enter the mid interval values of the first row Pressing = After each one Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5

145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 We need enter the mid interval values of the first row Pressing = After each one Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140

5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 Use the cursor keys to enter the data from the second row The down arrow takes you to the top of the column Finding the mean from a frequency Height (x cm) Frequency

135 130 - 140 5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 Use the cursor keys to enter the data from the second row The right arrow takes you to the top of the next column Finding the mean from a frequency Height (x cm)

Frequency 135 130 - 140 5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 We need to enter the Frequencies Pressing = After each one Finding the mean from a frequency

Height (x cm) Frequency 135 130 - 140 5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 We need to enter the Frequencies Pressing = After each one Finding the mean from a frequency

Height (x cm) Frequency 135 130 - 140 5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 We need to enter the Frequencies Pressing = After each one

Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150 155 150 160 160 165 170 7 8 6 175 170 180 4 We have finished inputting the data. We now need to analyse the STATS Press

AC Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150 150 160 155 160 170 165 170 180 175 7 8 6 4 We need to analyse

the STATS we have input Finding Finding the the mean mean from from aa frequency frequency table Height (x cm) Frequency 135 130 - 140 5 145 140 150 150 160 155 160 170

165 170 180 175 7 8 6 4 We need to analyse the STATS Finding the mean from a frequency we have input Height (x cm) Frequency 135 130 - 140 5 145 140 150 155 150

160 160 165 170 7 8 6 4 We want use VARiance Finding the mean from a frequency 175 170 180 Height (x cm) Frequency 135 130 - 140 5 145 140 150 155 150 160

160 165 170 7 8 6 175 170 180 4 We want to find the mean x Finding the mean from a frequency Height (x cm) Frequency 135 130 - 140 5 145 140 150 150 160 155

160 170 165 170 180 7 8 6 4 Press = Finding the mean from a frequency 175 Height (x cm) Frequency 135 130 - 140 5 145 140 150 150 160 155

160 170 165 170 180 175 7 8 6 4 The mean height of our class is 154cm Finding the mean from a frequency