3. a random sample of 100 records in a us city during the past year showed an average life span of 71.8 years. a. assuming normality and a population standard deviation of 8.9 years, does this seem to indicate that the mean life span today is not different than 70 years ? use a 0.10 level of significance and write hypothesis testing steps explicitly. b. find the p-value that corresponds to the test statistic. would you reject h0 by using the p-value? why ?

b is the answer that makes most sense

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i can't solve unless i know what the line is

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welcome to/p>

126 maybe. sorry

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

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