Find the critical T-value for this 90% confidence interval. Hint: Use the applet to find the T-value for 90% confidence with df = 71 – 1 = 70

Use the given data to construct a confidence interval for the population proportion  p  of the requested level. =x53 ,  =n68 , confidence level  80%   Round the answers to at least three decimal places.

In each of Exercises, we have presented a confidence interval (CI) for the difference, µ1 - µ2, between two population means. Interpret each confidence interval. 99% CI is from -20 to 15.

Find the critical values X7p and X2, for an 80% confidence when the sample size is 51.

Report a 95% confidence interval for the slope coefficient. What is the left limit of the interval? Round to four decimals.

Find the following. Enter your answer rounded to at least two decimals. Z(a/2) for the 95% confidence interval

One year, the mean age of an inmate on death row was 38.1 years. A sociologist wondered whether the mean age of a death-row inmate has changed since then. She randomly selects 32 death-row inmates and finds that their mean age is 36.9, with a standard deviation of 9.8. Construct a 95% confidence interval about the mean age. What does the interval imply? A Click the icon to view the table of critical t-values. Choose the correct hypotheses. Но (Type integers or decimals. Do not round.)

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