For each α, compute
(i) the confidence level
(ii) zα/2
(iii) tα/2,n−1 when n = 7.
(a) α = 0.2
(b) α = 0.02
(c) α = 0.001
For each α, compute (i) the confidence level (ii) zα/2 (iii) tα/2,n−1 when n = 7....
Compute the critical value zα/2 that corresponds to a 93% level of confidence. zα/2 = _______
Compute the critical value zα/2 that corresponds to a 86% level of confidence. Compute the critical value za/2 that corresponds to a 86% level of confidence 412 Za12 (Round to two decimal places as needed.)
Determine the upper-tail critical value tα/2 in each of the following circumstances.a.1−α=0.95, n=56d.1−α=0.95, n=64b.1−α=0.90, n=56e.1−α=0.99, n=22c.1−α=0.95, n=38
Determine the upper-tail critical value tα/2 in each of the following circumstances. a. 1 − α = 0.95, n=21 d. 1 − α = 0.95, n=48 b. 1 − α = 0.99, n=21 e. 1 − α = 0.90, n=13 c. 1 − α = 0.95, n=41 a. t equals ___? b. t equals ___? c. t equals ___? d t equals ___? e t equals ___? (Round to four decimal places as needed.)
Compute the critical value z Subscript alpha divided by zα/2that corresponds to a 96% level of confidence. z Subscript alpha divided by zα/2 equals=nothing (Round to two decimal places as needed.)
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies.The confidence level is 90%, σ=3347 thousand dollars, and the histogram of 56 player salaries (in thousands of dollars) of football players on a team is as shown.Select the correct choice below and, if necessary, fill in the answer box to...
I recommend that you practice using the standard Normal tables to calculate zα/2 and tα/2 . Costs are rising for all kinds of health care. The mean monthly rent at assisted-living facilities was recently reported to have increased 15% over the last five years. A recent random sample of 120 observations reported a sample mean of $3563. Assume that past studies have informed us that the population standard deviation is $650. For this problem, round your answers to 2 digits...
Find the value of zα/2 that corresponds to a confidence level of 89.48%. A. 1.25 B. 0.0526 C. 1.62 D. 1.62
Suppose a 95% confidence level has a value of tα/2 = 2.018. What sample size was used in generating this confidence interval? A. 41 B. 43 C. 4 D. 5 E. 42 F. None of these
If n < 30 and σ İs unknown, then the 100(1-α)% confidence interval for a population mean is_ 7. assuming the population is normally distributed xtra 21 1(degrees of freedom = n-2) a. 1 (degrees of freedom-n-1) c. t(degrees of freedom-n-1) 1 d. x ± te |--| (degrees of freedom n-2) 1 (degrees of freedom = n-1) If n interval when the level of confidence is 99% 8. 16, then find the number ta2 needed in the construction of a...