Question: Q1) A sample yields a 95% confidence interval for a population proportion 1 ? 2 as 0.34 to 2.28. Which of the following conclusions from

Q1) A sample yields a 95% confidence interval for a population proportion 1 ? 2 as 0.34 to 2.28. Which of the following conclusions from the confidence intervalis INCORRECT?

a.The means are probably not equal

b.the probability that 1 ? 2 lies between 0.34 and 2.28 is 95%

c.0.34 is the smallest value of 1 ? 2 for which the sample outcome is likely, and 2.28 is the largest value

d.The likely range for 1 ? 2 is 0.34 to 2.28

Which one and why?

Q2) A researcher wishes to test the hypothesis H₀:=25using a sample with mean =21.2, standard deviation = 5.8and n =30.What is the test-statistic for this hypothesis test?

nb:

Q1) A sample yields a 95% confidence interval for a population proportion

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