# A stylist at the hair care palace gathered data on

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Chapter 3 / Exercise 15
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14. A stylist at the Hair Care Palace gathered data on the number of hair colorings givenon Saturdays and weekdays.Her results are listed below.Assume the two sampleswere taken independently:Saturdays:n1= 50x1= 14weekdays:n2= 65x2= 13a.Find the Point estimate ofP1-P2and the margin of error.b.Estimate the difference in the true proportions with a 99% confidence interval.Interpret this interval.15. IfXhas an exponential distribution with parameterλ, derive a general expression forthe (100p)th percentile of the distribution. Then specialize to obtain the median.16. Find the joint and marginal densities corresponding to the cdfF(x, y) = (1-e-αx)(1-e-βy)x0y0α >0β >0.3
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Chapter 3 / Exercise 15 Expert Verified
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