(Solved): The standard deviation of the lengths of hospital stay on the intervention ward is \( 7.5 \) days. ...

The standard deviation of the lengths of hospital stay on the intervention ward is \( 7.5 \) days. Complete parts (a) through (c) below. a. For the variable "length of hospital stay, "determine the sampling distribution of the sample mean for samples of 86 patients. The sampling distribution will be approximately normal with mean \( \mu \) and standard deviation \( \sigma \bar{x}= \) (Round to four decimal places as needed.)