Help needed!

I am having some trouble with the following problem...

Investment trusts are companies whose sole activity is the owning of shares in other companies. Each trust may, typically, hold shares of 100 or more selected other companies. The dividends paid by investment trusts are thus the dividends that they receive from the companies whose shares they hold, less the cost of running the trusts. Random samples of 12 investment trusts and 14 other companies are taken and their dividend yields (%) recorded as follows:

Investment trusts: 1.3 2.9 3.2 3.3 2.6 0.0 5.0 0.4 2.3 5.4 3.7 2.4

Other companies: 0.6 9.3 2.0 3.9 5.5 6.7 4.8 10.3 5.2 4.4 6.5 0.0 4.5 4.2

Use a distribution free procedure to determine whether the performance of Investment trusts is significantly different from that of other companies, and interpret your result. Estimate the probability that a randomly selected Investment trust will perform better than a randomly selected company of the “other” type.

And help would be greatly appreciated!


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