Back to back Stem and Leaf 5

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Back to back Stem and Leaf (5)

• Statistics

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Tests are to be carried out on a new type of
chicken food to see if the new food
significantly increases the weight of the
chickens. Fifteen chickens are given the new
food and another fifteen are fed on the usual
chicken food. The weight increases in the
chickens are recorded over a short period of
time and these results are shown in the next
slide.
Draw a back to back stem and leaf diagram to
compare the figures.
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Weight increase ( in Kg) usual food
Weight increase ( in Kg) new food
The new food costs more than the usual food for
the chickens. Do the results justify changing
to the new type of chicken food?