Question

In each of exercise 10.13-10.18, we have presented a confidence interval for the difference,${\mu }_1-{\mu }_2$, between two population means. interpret each confidence interval

$99\%$CI from$-20to15$

Short answer

One can be$99\%$confident that ${\mu }_1-{\mu }_2$lies somewhere between $-20to15$

Equivalently one can be $99\%$confident that ${\mu }_1$is somewhere greater than${\mu }_2$.

Step-by-step solution

Given Information

Given in the question that,

$99\%$CI from $-20to15$ we have to calculate the interpretation of confidence level.

Explanation

The mean found in a sample is thought to represent the best estimate of the population's true value. The sample mean of $99\%$percent Cl is interpreted as a range of values containing the genuine population mean with probability $0.99or99\%$.

Finding a confidence interval for the difference between two means can be used to compare two population means.

Assume that ${\mu }_1$is the mean of a variable in population $1$and ${\mu }_2$is the mean of a variable in population $2$. The sampling distribution of the difference between two means is then ${\mu }_1-{\mu }_2$.

Given a$99$percent confidence interval, Cl ranges from$-20to15$

The confidence interval's endpoints are both positive values in this case.

This means that ${\mu }_1-{\mu }_2$is $99\%$ certain to exist someplace.