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The monthly returns of two...

The monthly returns of two portfolios are to be compared. The monthly returns are analyzed for each of 13 months, with the months being chosen at random and independently for the two portfolios. The following statistics for monthly returns are reported for portfolio 1 and portfolio 2 :

Portfolio 1Portfolio 2

x1 = .12 x2 = .13

s21 = .0049s22 = .0025

(The first row gives the sample means, and the second row gives the sample variances.)

Assume that the monthly returns of the two portfolios are each normally distributed. Construct a 90% confidence interval for o12/o22, the ratio of the variances of the monthly returns for these two portfolios. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Write your final responses to at least two decimal places.

What is the lower limit of the 90% confidence interval?

What is the upper limit of the 90% confidence interval?

Let me know if you need a screen shot of the question - the upper and lower power numbers don't translate well in plain text like this so it may be confusing.

fyi there is a time limit on this - if you can't answer within the next five minutes please let me know and I can move on to another question. thx!

Portfolio 1Portfolio 2

x1 = .12 x2 = .13

s21 = .0049s22 = .0025

(The first row gives the sample means, and the second row gives the sample variances.)

Assume that the monthly returns of the two portfolios are each normally distributed. Construct a 90% confidence interval for o12/o22, the ratio of the variances of the monthly returns for these two portfolios. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Write your final responses to at least two decimal places.

What is the lower limit of the 90% confidence interval?

What is the upper limit of the 90% confidence interval?

Let me know if you need a screen shot of the question - the upper and lower power numbers don't translate well in plain text like this so it may be confusing.

fyi there is a time limit on this - if you can't answer within the next five minutes please let me know and I can move on to another question. thx!

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