We want to conduct a hypothesis test of the claim that for middle-aged adults the population mean of their cholesterol levels is more than 195 mg/dL. We choose a random sample of such levels. The sample has a mean of 193 mg/dL and a standard deviation of 18 mg/dL .For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. A) The sample has size 75, and it is from a non-normally distributed population with a known standard deviation of 19.2. Z = ____ t = ____ or It is unclear with test statistic to use ____(X) B)The sample has a size 15, and it is from normally distributed population with an unknown satandard deviation. Z = ___ t =____ or: It is unclear with test statistic to use ____(X) Indications: select with X or calculate for a) and b).
We want to conduct a hypothesis test of the claim that for middle-aged adults the population mean of their cholesterol levels is more than 195 mg/dL. We choose a random sample of such levels. The sample has a mean of 193 mg/dL and a standard deviation of 18 mg/dL
.For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places.
A) The
Z = ____
t = ____
or It is unclear with test statistic to use ____(X)
B)The sample has a size 15, and it is from normally distributed population with an unknown satandard deviation.
Z = ___
t =____
or: It is unclear with test statistic to use ____(X)
Indications: select with X or calculate for a) and b).
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