If n=21n=21, ¯xx¯=49, and s=17s=17, construct a confidence interval at a 99% confidence level. Give your answers to one decimal place.  < μμ <

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 -10 to 5.

One year, the mean age of an inmate on death row was 41.6 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 40.9, with a standard deviation of 9.6. Construct a 95% confidence interval about the mean age. What does the interval imply? E Click the icon to view the table of critical t-values. Choose the correct hypotheses. Họ: H 41.6 H1: u 41.6 (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.)

Express the confidence interval 83.2%±7.2%83.2%±7.2% in interval form.

You measure 50 textbooks' weights, and find they have a mean weight of 58 ounces. Assume the population standard deviation is 14.7 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight.Report your answers to three decimal places. Confidence Interval = (        ,        )

Find the critical​ t-value that corresponds to 70​% confidence. Assume 7 degrees of freedom.

please solve for the following

You measure 45 backpacks' weights, and find they have a mean weight of 37 ounces. Assume the population standard deviation is 3.5 ounces. Based on this, construct a 95% confidence interval for the true population mean backpack weight. Give your answers as decimals, to two places ± ounces

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.