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

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: π ≥ .40 versus H1: π < .40 would require
a left-tailed test.
a two-tailed test.
a right-tailed test.
At α = .05, the critical value to test the hypotheses H0: π ≥ .40 versus H1: π < .40 would
be
A.-2.326
B. -1.960
C. -1.645
impossible to determine without more information
If n = 25 and α = .05 in a right-tailed test of a mean with unknown σ, 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: µ = 56 versus H1: µ ≠ 56
B.H0: µ ≥ 56 versus H1: µ 56
D.H0: µ 60
B. H0: µ = 60 versus H1: µ ≠ 60
C.H0: µ < 60 versus H1: µ ≥ 60
D.H0: µ ≥ 60 versus H1: µ 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: µ ≥ 56 versus H1: µ < 56