I'm looking for help on this question with step to step. thanks :)

1.	I'm looking for help on this question with step to step. thanks :)
Answer» Mean height of plant is 30.5 cm. Step-by-step explanation: We are given the data about the heights (h in cm) of the plants below ; Height of plants (h) Mid-point (X) Frequency (f) $X \times f$ 0 < h < 10 5 1 5 10 < h < 20 15 4 60 20 < h < 30 25 7 175 30 < h < 40 35 2 70 40 < h < 50 45 3 135 50 < h < 60 55 3 165 Total 20 610 Here, mid-point is CALCULATED by the following formula; Mid-point for 0 < h < 10 = $\frac{\text{Upper limit + Lower Limit}}{2}$ = $\frac{10+0}{2} =5$ Now, the mean for any frequency distribution is given by the following formula; Mean, $\bar X$ = $\frac{\sum X\times f}{\sum f}$ = $\frac{610}{20}$ = 30.5 cm Hence, by USING midpoints of each group, the mean height of a plant is 30.5 cm.

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