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Mashcka [7]
2 years ago
10

Market researchers selected a random sample of people from region a and a random sample of people from region b. The researchers

asked the people in the samples whether they had tried a new product. The difference between the sample proportions (b minus a) of people in the regions who indicated they had tried the new product was 0. 15. Under the assumption that all conditions for inference were met, a hypothesis test was conducted with the alternative hypothesis being that the population proportion of b is greater than that of a. The p-value of the test was 0. 34.
SAT
1 answer:
dlinn [17]2 years ago
7 0

The #15 is correct. B minus A. Your welcome!

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In this situation, we know that the mollusks have evolved before the arthropods, and since the arthropods are found in the second, grey layer, the mollusks will be found in the layer bellow them, the first, black, layer.

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