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 95 %, σ=3848 thousand dollars, and the histogram of 57 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 complete your choice.
A. tα/2=
(Round to two decimal places as needed.)
B. zα/2=
(Round to two decimal places as needed.)
C. Neither the normal distribution nor the t distribution applies.
Answer:
Population standard deviation is known, so we use z distribution.
confidence level = 95%
significance level = 1 - 0.95 = 0.05
Z alpha/2 = Z 0.05/2 = Z 0.025 = 1.96 (From z table)
Option B. Z alpha/2 = 1.96 is correct
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...
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 95 %, σ is not known, and the histogram of 61 player salaries (in thousands of dollars) of football players on a team is as shown.Select the correct choice below and, if...
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 distribution applies. The confidence level is 95%, o is not known, 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...
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 99 %, σ=3873 thousand dollars, and the histogram of 67 player salaries (in thousands of dollars) of football players on a team is as shown.
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