The table Shows evens cell phone results of Evans class survey regarding the number of students with cell phones, cell phone: girls=9 ,boys=12 without cell phone: girl=3 boy=3 which is the true statement ?

a. less than 25% of girls have one

b. less than 20% of his class dose not have one

c. more than 80% of boys have one

d. more than 75 % of his class has one

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.