Alex swam a total of 11.5 hours during the work week and then swam a total of 2.6 hours on the weekends. he swam the same number of hours each week for 7 weeks. what was the total number of hours alex swam after 7 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.