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Parents of teenage boys often complain that auto insurance costs more, on average, for teenage boys...

Parents of teenage boys often complain that auto insurance costs more, on average, for teenage boys than for teenage girls. A group of concerned parents examines a random sample of insurance bills. The mean annual cost for 36 teenage boys was $679. For 23 teenage girls, it was $559. From past years, it is known that the population standard deviation for each group is $180. Determine whether or not you believe that the mean cost for auto insurance for teenage boys is greater than that for teenage girls.

math   Statistics-And-Probability   
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Answer #1

Givern,= 36 = 619, 51-180 (boys) 12 - 23, 2, -559,02: 180 (girls) The null hypothesis is to p. 82 The alternative hypobbesis

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