Studies have shown that the average survivor has consumed the equivalent of 4.9
ID: 3204702 • Letter: S
Question
Studies have shown that the average survivor has consumed the equivalent of 4.9 lbs of boogers in a one-year timespan, with a standard deviation of .98. In the Post Falls survivor compound, 126 survivors were selected to take part in a booger-eating awareness hypnosis seminar. They were implanted with a booger-eating-measuring device to determine the amount of boogers they consume. After one year, the average amount of boogers consumed was 4.1.
1) What is the standard error of the mean of the study?
2) What is the z score for this sample?
3) What do we conclude for the sample?
Explanation / Answer
1) standard error =std deviation/(n)1/2 =(0.98/(126)1/2 =0.0873
2) z score =(X-mean)/std error =(4.1-4.9)/0.0873 =-9.1638
3)as z score is very less for which probabilty is very less if mean consumption is 4.9. , we can conclude that after booger-eating awareness hypnosis seminar , consumption has been reduced,