2 Solve the problem. 15) According to a college survey, 22% of all students work

Question

2 Solve the problem. 15) According to a college survey, 22% of all students work full time. Find the mean for the 15) number of students who work full time in samples of size 16. standard Determine if the outcome is unusual. Consider as unusual any result that differs from the mean by more than 2 deviations. That is, unusual values are either less than ?-2? or greater than ? + 20. 16) A survey for brand recognition is done and it is determined that 68% of consumers have 16) heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups of 800, would it be unusual to get 687 consumers who recognize the Dull Computer Company name? 17) A survey for brand recognition is done and it is determined that 68% of consumers have 17) heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups of 800, would it be unusual to get 541 consumers who recognize the Dull Computer Company name? Identify the given random variable as being discrete or continuous. 18) 18) The number of oil spills occurring off the Alaskan coast 19) 19) The height of a randomly selected student

Explanation / Answer

Solution:-

15) Given that p = 0.22, n = 16

mean = n*p = 16*0.22 = 3.52

16) Yes.

=> Mean = n*p = 800*0.68 = 544

sd = sqrt(n*p*q) = sqrt(800*0.68*0.32) = 13.2

Maximum values = mu + 2s = 544 + (2*13.2) = 570.4  

17) Yes.

18) Discrete

19) continuous

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