According to a study of political prisoners, the mean duration of imprisonment for 30 prisoners with chronic post-traumatic stress disorder (PTSD) was 30.6 months. Assuming that sigmaequals42 months, determine a 95% confidence interval for the mean duration of imprisonment, mu, of all political prisoners with chronic PTSD. Interpret your answer in words.

The 95% confidence interval for the mean duration of imprisonment, mu, of all political prisoners with chronic PTSD is between 15.57 months and 45.63 months.

This means that we are 95% sure that the true mean mean duration of imprisonment, mu, of all political prisoners with chronic PTSD is between 15.57 months and 45.63 months.

Step-by-step explanation:

We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so

Now, find the margin of error M as such

In which is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 30.6 - 15.03 = 15.57 months

The upper end of the interval is the sample mean added to M. So it is 30.6 + 15.03 = 45.63 months

The 95% confidence interval for the mean duration of imprisonment, mu, of all political prisoners with chronic PTSD is between 15.57 months and 45.63 months.

This means that we are 95% sure that the true mean mean duration of imprisonment, mu, of all political prisoners with chronic PTSD is between 15.57 months and 45.63 months.

£56

step-by-step explanation:

u divide 24 by 3 and u get 8 so if u do 8 time 7 or 8+8+8+8+8+8+8 u get 56 and 56 divided by 7 is 8.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere