Which of the following are the solutions for the equation? A: x=8 & x=4
B: x=-8 & x=-4
C: x=-8 & x=4
D: x=8 & x=-4

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.