When an opinion poll uses random digit dialing to select respondents for polls, the response rate is approximately 10% for people contacted by cell phone. You watch a (a) What is the mean number of calls that yield a response? pollster dial 20 cell numbers many times using random 20 digit dialing. 22 2 0.1

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A: 53   57   61   49   52   56   58   62   51   56   55.5 Mean 4.2492 Stdev

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A: here from given information  n1 = 4 n2 = 6 n3 = 5   x1¯ = 2   , x2¯ = 2   , x3¯ = 2  σ21 = 3 , σ22 =…

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A: Hii ! Thanks for posting the question . Since , your question has more than three subparts , we have…

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