1.Use Excel to find the critical value of z for each ...

[Pages:3]1.Use Excel to find the critical value of z for each hypothesis test. (Round your answers to 3 decimal places. Negative value should be indicated by a minus sign.)

(a) 10 percent level of significance, two-tailed test. Critical value of z: ? 1.645

(b) 1 percent level of significance, right-tailed test. Critical value of z: 2.326

(c) 5 percent level of significance, left-tailed test. Critical value of z: -1.645

2. Find the critical value of Student's t for each hypothesis test using Appendix D. (Round your answers to 3 decimal places. Negative value should indicated by a minus sign.)

(a) 10 percent level of significance, two-tailed test, n = 21

Critical value: ?1.725

(b) 1 percent level of significance, right-tailed test, n = 9

Critical value: 2.896

(c) 5 percent level of significance, left-tailed test, n = 28

Critical value: -1.703

3.Use Excel to find the critical value of z for each hypothesis test. (Round your answers to 3 decimal places. Negative value should be indicated by a minus sign)

(a) 8 percent level of significance, two-tailed test. Critical value of z: ?1.751

(b) 6 percent level of significance, right-tailed test. Critical value of z: 1.555

(c) 9 percent level of significance, left-tailed test. Critical value of z: -1.341

4. Find the critical value of Student's t for each hypothesis test using Appendix D. (Round your answers to 3 decimal places. Negative value should indicated by a minus sign.)

(a) 2 percent level of significance, two-tailed test, n = 24 Critical value: ?2.500

(b) 1.0 percent level of significance, right-tailed test, n = 10 Critical value: 2.821

(c) 5.0 percent level of significance, left-tailed test, n = 26 Critical value: -1.708

The hypotheses H0: .40 versus H1: < .40 would require a left-tailed test. a two-tailed test. a right-tailed test.

At = .05, the critical value to test the hypotheses H0: .40 versus H1: < .40 would be A.-2.326 B. -1.960 C. -1.645 impossible to determine without more information

If n = 25 and = .05 in a right-tailed test of a mean with unknown , the critical value is A.1.711 B..0179 C.1.960 D.1.645

The process that produces Sonora Bars (a type of candy) is intended to produce bars with a mean weight of 56 gm. The process standard deviation is known to be 0.77 gm. A random sample of 49 candy bars yields a mean weight of 55.82 gm. Which are the hypotheses to test whether the mean is smaller than it is supposed to be? A. H0: ? = 56 versus H1: ? 56 B.H0: ? 56 versus H1: ? 56 D.H0: ? 60 B. H0: ? = 60 versus H1: ? 60 C.H0: ? < 60 versus H1: ? 60 D.H0: ? 60 versus H1: ? 100, then the test is right-tailed. C.Ho is rejected when the calculated p-value is less than the critical value of the test statistic. D. In a right-tailed test, we reject H0 when the test statistic exceeds the critical

The answer choices listed above seem to be a jumble of choices from more than one problem, and some symbols are missing, so I can't tell you exactly which answer to select, meaning that I can't give you "A", "B", "C", etc.

However, the hypotheses for the stated problem would be:

H0: ? 56 versus H1: ? < 56

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