If you were constructing a 99% confidence interval of the population mean based on a sample of n 1) = 25 where the standard deviation of the sample S = 0.05, the critical value of t will be

We want a confidence of 99% so then the significance level would be 1%

The degrees of freedom are given by:

And the critical value using the significance level and and the critical value would be:

Step-by-step explanation:

We know the following info :

represent the standard deviation from the sample

represent the sample size selected

We want a confidence of 99% so then the significance level would be 1%

The degrees of freedom are given by:

And the critical value using the significance level and and the critical value would be:

d

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.