Question

Any help? seems easy but keep getting it wrong.

Answer 1

69.6 inches

Explanation:

The mean height from a frequency table is given by

`\bar x = ( \sum \: fx)/( \sum \: f)`

We need to multiply the frequencies by the weight and sum them up to get:

5×64+2×65+5×66+1×69+3×72+2×75+5×77=1600

The total frequency is 23.

We substitute into the formula to get:

`\bar x = (1600)/(23)`

`\bar x = 69.57`

The mean height to the nearest tenth is 69.6 inches