A study investigated the cost of Botox injections at clinics in a large city. A random sample of bills from 28 Botox procedures had a sample mean of $452, with a corresponding 95% confidence interval of ($430, $474). Suppose that the assumptions of thetprocedures are reasonable here, so the confidence interval methods are valid. Which one of the following is the best interpretation of that interval?

Please choose the best answer.

Question 8 options:

a)	95% of Botox procedures in this area cost between $430 and $474.

b)	In repeated sampling, 95% of Botox procedure costs will lie between $430 and $474.

c)	We can be 95% confident that the population mean cost of Botox procedures in this area lies between $430 and $474.

d)	We can be 95% confident that the sample mean cost of the 28 Botox procedures lies between $430 and $474.

e)	In repeated sampling, 95% of the confidence intervals will be ($430, $474).