The sample mean adult weight from the 60 observations based on the CDC data, = 173.3 lbs, and the standard deviation, s= 49.04. Calculate an approximate 95% confidence interval for the mean weight of adults.

*Here you have a choice of using the formula and manually calculating the confidence interval, or using the Minitab software.We will be using the software.

To use Minitab: Stat>Basic Statistics> 1-sample t> use the down arrow next to "one or more samples each in one column" and select Summarized data > Sample size, Enter 60> Sample mean, Enter 173.3> standard deviation, Enter 49.04> Options> Confidence Level 95.0>Alternative hypothesis: Mean ? hypothesized mean > OK> OK

One-Sample : for the Mean Summarized data Sample size: Sample mean: 173.1 Standard 49.04One-Sample t Options Confidence level: 95.0 Alternative hypothesis: Mean * hypothesized mean Help OK Cancel