The water flow rate of a regular shower head is 3.5 gallons per minute. At this rate it would cost $1.90 for the water used for a 10 minute shower​

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.