do from 5 to 8 only d. (4,6) e. (0,5) 5. Which of the following is true about a

Question

do from 5 to 8 only

d. (4,6) e. (0,5) 5. Which of the following is true about a confidence interval for the population mean? a. it is a single number: an estimate for the value of the population mean b. it always contains the sample mean c. it always contains the population mean d. it is a lower and an upper bound of an interval of values which always contains the population mean e, many numbers as possible 6. When we build a 90% and a 95% confidence interval using the same data and the same method, which of the following is true? a. The 90% confidence interval contains the 95% confidence interval b. The lower bound for the 90% confidence interval is larger than the lower bound for the 95% confidence interval c. The probability that both contain the population mean is very small d. The widths of these two intervals are not comparable e. Which confidence interval is wider depends on the random data 7. We take 100 independent samples of size 4 from the same normally distributed population with mean u 10 and known standard deviation o 4. We build a 90% two-sided z confidence interval using each sample. What is the expected number of intervals that will contain the value 10? a. 4 b. 95 c. 90 d. 100 e. Cannot be decided 8. In a test of hypotheses for the mean A, which of the following quantities depends on the distribution under the alternative hypothesis? a. Power of the test b. The critical value and the rejection region

Explanation / Answer

5) Answer is (b)

6) Answer is (a)

7) Answer is (d)

8) Answer is (a)

9) Answer is (a)

10) Answer is (c)

11) Answer is (e)

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