Cruz filled his car with 10.2 gallons of gas at $2.89 per gallon. if he fills his car with about this much gas at about this price once a week, estimate how much he will have spent on gas after four weeks.

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.