Suppose that a committee is studying whether or not there is waste of time in our judicial system. it is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. the committee randomly surveyed 81 people who recently served as jurors. the sample mean wait time was eight hours with a sample standard deviation of four hours.
a.
i. x¯= 8
ii. sx = 4
iii. n = 81
iv. n – 1 = 80

b. define the random variables x and x¯in words. x is amount of time individuals waste at the courthouse waiting to be called for jury duty. x- is mean amount of time that sample of 81 people who recently served at jurors.
c. which distribution should you use for this problem? explain your choice.
d. construct a 95% confidence interval for the population mean time wasted.
i. state the confidence interval.
ii. sketch the graph.
iii. calculate the error bound.
e. explain in a complete sentence what the confidence interval means.

answer: just subtact the units and then add the non negative : happy to

step-by-step explanation:

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

idk

step-by-step explanation:

1.30

step-by-step explanation: