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2 3 5 P6 7 8 beoco on a State the null hypothesis Ho and the alternate hypothesis H HO H 0 b Determine the type of test statistic to use 10 Perform a one tailed test Then complete the parts below Carry your intermediate computations to three or more decimal places If necessary consult a list of formulas Lake Martin and Lake Fields are two large local lakes inhabited by white sturgeon A while back there was an environmental disaster at Lake Martin Yoko is an ecologist who wants to see if the mean weight in kg of adult white sturgeon now living in Lake Martin is less than the mean weight in kg of adult white sturgeon now living in Lake Fields The ecologist catches a random sample of 10 adult white sturgeon at Lake Martin and a random sample of 12 adult white sturgeon at Lake Fields These samples are chosen independently Each fish has its weight in kg recorded The white sturgeon caught at Lake Martin have a sample mean weight of 78 78 with a sample variance of 26 58 The white sturgeon caught at Lake Fields have a sample mean weight of 92 88 with a sample variance of 393 58 x Assume that the two populations of weights are approximately normally distributed Can the ecologist conclude at the 0 05 level of significance that the population mean of the weights of adult white sturgeon now living in Lake Martin is less than the population mean of the weights of adult white sturgeon now living in Lake Fields X a S P 11 Q 12 DO 13 D 0 OSO 020 14

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