Mathematics, 28.07.2020 19:01 mountainwilson
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.
Answers: 3
Mathematics, 22.06.2019 01:00
In a newspaper, it was reported that yearly robberies in springfield were up 25% to 265 in 2013 from 2012. how many robberies were there in springfield in 2012?
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Mathematics, 22.06.2019 03:30
Ben and cam are scuba diving. ben is 15.815.8 meters below the surface of the water. cam is 4.24.2 meters above ben. what is cam's position relative to the surface of the water? choose 1 choose 1 (choice a) a 11.611.6 meters above the surface of the water (choice b) b 11.611.6 meters below the surface of the water (choice c) c 2020 meters above the surface of the water (choice d) d 20 meters below the surface of the water
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Mathematics, 22.06.2019 03:40
1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go
Answers: 2
Suppose that, in 2010, 13.4% of all cars purchased nationwide were gray. The owner of several local...
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