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    Category :Math/Stat Homework

    Posted By:AccountingExpert

    Price Offered : $3

    Posting Date : 2014/06/29 12:31

    Due Date : 2014/06/29 09:00

    Answered (1 time)



    1. A random variable is binomially distributed with n = 16 and π = .40. The expected value and standard deviation of the variables are:

    A. 2.00 and 1.24 
    B. 4.80 and 4.00 
    C. 6.40 and 1.96 
    D. 2.00 and 1.20 

    2. If σ = 12, find the sample size to estimate the mean with an error of ± 4 and 95 percent confidence (rounded to the next higher integer).

    A. 75 
    B. 35 
    C. 58 
    D. 113 

    3. The owner of Torpid Oaks B&B wanted to know the average distance its guests had traveled. A random sample of 16 guests showed a mean distance of 85 miles with a standard deviation of 32 miles. The 90 percent confidence interval (in miles) for the mean is approximately:

    A. (71.0, 99.0) 
    B. (71.8, 98.2) 
    C. (74.3, 95.7) 
    D. (68.7, 103.2) 

    Answer
    Submitted by AccountingExpert on 2014/06/29 12:32
    teacher rated 211 times

    Price: $3.00

     

    expected value and standard deviation




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