Find a common denominator and then subract and simplify your answer.
11/12-3/4
a. 1/7
b. 1/5
c. 1/6

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.