Question

A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 112 students who averaged 26.7 texts per day. The standard deviation was 24.9 texts. If many groups of 112 randomly selected members are studied, then a different confidence interval would be produced from each group. About _____ percent of these confidence intervals will contain the true population number of texts per day and about _____ percent will not contain the true population mean number of texts per day. Round answers to 3 decimal places where possible.

Answer 1

from above 90% CI =22.797 ; 30.603

( plesae try 22.830 ; 30.570 if this comes wrong)

About _90_ percent of these confidence intervals will contain the true population number of texts per day and about _10_ percent will not contain the true population mean number of texts per day.