Mason and nora decided to swim across the river. mason began swimming 7.7 seconds earlier than nora. mason swam at a speed of 5 feet per second. nora swam at a speed of 5+1 feet per second. for how many seconds had mason been swimming at the moment when the two swimmers had swam exactly the same distance?

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.