Approximate the area under the function between a and b using a left hand sum with the given number of intervals.
f(x)=x^2
a=0 b=4 4 intervals

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.