Question

In a New York City high school, a survey revealed the mean amount of cola consumed each week was 12 bottles and the standard deviation was 2.8 bottles. Assuming the survey represents a normal distribution, how many bottles of cola per week will approximately 68.2% of the students drink? 1) 6.4 to 12 2) 6.4 to 17.6 3) 9.2 to 14.8 4) 12 to 20.4

Answer 1

First off, hello welcome to qc, what do u think the answer is

Answer 2

old question but will respond so this can be closed

68.2% of values are within one standard deviation of the mean. so you should be looking at (mean + SD) as your upper bound and (mean - SD) as your lower bound.