2 problems that I need help with. ———————————– # 4) A legal researcher is studying the age distribution of juries by comparing…

2 problems that I need help with.———————————–# 4) A legal researcher is studying the age distribution of juries by comparingthem with the overall age distribution of available jurors. The researcherclaims that the jury distribution is different from the overall distribution; thatis, there is a noticeable age bias in jury selection in this area.The table showsthe number of jurors at a county court in one year and the percent of personsresiding in that county, by age. Use the population distribution to find theexpected juror frequencies.Test the researcher’s claim at a = 0.01 21-2930-3940-4950-5960 and aboveJury45128244224359population20.50%21.70%18.10%17.30%22.40%#16) A steel pipe fittings company claims that the yield strength of its non temperedcouplings is more variable than that of its tempered couplings.A random sample of nine tempered couplings has a standard deviation of13.1 megapascals, and a similar sample of nine nontempered couplings hasa standard deviation of 25.4 megapascals. From past data, it is known thatthe company’s production process results in normally distributed yieldstrengths.Test the company’s claim at a = 0.05.

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