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13 December, 05:26

The table shows the height of pea plants in centimeters after 6 weeks of growth. Each plant started at a height of 5 centimeters. Two planting soils were tested. Which statement BEST compares the mean growth percentage for the two sets of data?

Planting soil 1 plant height:

15, 10, 19, 17, 16, 12, 20, 22, 18, 35

Planting soil 2 plant height:

16, 17, 10, 12, 18, 17, 14, 15, 17, 23

A) Planting soil 1 growth percentage is approximately 14% more than planting soil 2 growth percentage.

B) Planting soil 2 growth percentage is approximately 14% more than planting soil 1 growth percentage.

C) Planting soil 1 growth percentage is approximately 50% more than planting soil 2 growth percentage.

D) Planting soil 2 growth percentage is approximately 50% more than planting soil 1 growth percentage.

+4
Answers (1)
  1. 13 December, 08:42
    0
    C

    Step-by-step explanation:

    First find the mean of each group. To do this we total the numbers and then divide by the number of measurements. There are 10 measurements for each.

    Planting soil 1

    15 + 10 + 19 + 17 + 16 + 12 + 20 + 22 + 18 + 35 = 184

    184 / 10 = 18.4cm

    18.4 / 5 cm = 368

    368% growth

    Planting soil 2

    16 + 17 + 10 + 12 + 18 + 17 + 14 + 15 + 17 + 23 = 159

    159 / 10 = 15.9

    15.9 / 5 = 318

    318% growth

    The difference between the two plant percentage growths is 50%, with plant 1 being more than plant 2, so the answer is C.
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