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28.07.2020 •
Mathematics
Suppose that, in 2010, 13.4% of all cars purchased nationwide were gray. The owner of several local car dealerships wants to compare this proportion to the current proportion of customers who purchase gray cars. To test this, she selects a random sample of 220 recent purchases and finds that 31 people, or 14.1%, purchased gray cars. She plans to use this information in a one-sample z ‑test for a proportion to determine whether the proportion of customers who purchase gray cars has changed since 2010. Choose the appropriate null (H0) and alternative (H1) hypotheses for such a test.
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Ответ:
the total of a triangle would be 180 so 90 and 70 together gets 160 so the remainder would be 20 so then you would divide 20 by 5 and the answer would be 4
Step-by-step explanation:
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