Question

One year, the mean age of an inmate on death row was 39.8 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 38.7, with a standard deviation of 8.7. Construct a 95% confidence interval about the mean age. What does the interval imply? Click the icon to view the table of critical t-values. H0: ? = 39.8 H1: ? ? 39.8 (Type integers or decimals. Do not round.) Construct a 95% confidence interval about the mean age. With 95% confidence, the mean age of a death row inmate is between years and years. (Round to two decimal places as needed.)

          One year, the mean age of an inmate on death row was 39.8 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 38.7, with a standard deviation of 8.7. Construct a 95% confidence interval about the mean age. What does the interval imply?
Click the icon to view the table of critical t-values.

H0: ? = 39.8
H1: ? ? 39.8
(Type integers or decimals. Do not round.)

Construct a 95% confidence interval about the mean age.

With 95% confidence, the mean age of a death row inmate is between years and years. (Round to two decimal places as needed.)

One year, the mean age of an inmate on death row was 39.8 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 38.7, with a standard deviation of 8.7. Construct a 95% confidence interval about the mean age. What does the interval imply?
Click the icon to view the table of critical t-values.

H0: ? = 39.8
H1: ? ? 39.8
(Type integers or decimals. Do not round.)

Construct a 95% confidence interval about the mean age.

With 95% confidence, the mean age of a death row inmate is between years and years. (Round to two decimal places as needed.)

Added by Andrew O.

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