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Homework Progress
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The table shows the heights of 40 students in a class.
Height (h)
Frequency
in cm
120 <t< 124
7
124 < t < 128
8
128 <t< 132
13
132 <t< 136
9
136 <t<140
3
a) Calculate an estimate for the mean height of the students.
129.3 cm
b) Explain why your answer to part (a) is an estimate. I
+​

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