Question

7. If a data set with a mean of 4.5 has a standard deviation of 2.5, the 95% confidence interval is8. The margin of error for the data set and confidence interval described in #7 is

Answer 1

The confidence interval formula is given as

`\begin{gathered} CI\text{ = mean }\pm\text{ z}\frac{s}{\sqrt[]{n}} \\ \text{where } \\ z\text{ = }confidence\text{ level value} \\ s\text{ = standard deviation} \\ n\text{ = sample size} \end{gathered}`