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Category > Management Posted 30 Oct 2017 My Price 7.00

random variables.

The weekly cash inflows (x) and outflows (y) of a business firm are random variables. The following data give values of x and y for 30 weeks. Assume that x and yare normally distributed.

x                              y                              x                              y                              x                              y

42                           25                           70                           39                           93                           20

65                           37                           82                           36                           86                           68

76                           83                           90                           82                           68                           72

92                           36                           68                           30                           53                           60

37                           73                           82                           72                           87                           65          

47                           23                           28                           39                           63                           80

27                           97                           61                           27                           47                           62

23                           36                           75                           38                           52                           36

63                           70                           83                           27                           38                           43

40                           51                           60                           78                           90                           57

(a) Obtain unbiased estimates of the means and variances of x, y, and x - y. Also obtain 95% confidence intervals for these six variables.

(b) Test the hypothesis µx > µ assuming that:

(1) x and yare independent.

(2) x and yare correlated.

 

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Status NEW Posted 30 Oct 2017 07:10 PM My Price 7.00

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