The following data give the anxiety levels of randomly selected ten people, whose weight considered as unhealthy, before and after they have cheated on their diet with a heavy meal.; Case Before After...

Extracted text: The following data give the anxiety levels of randomly selected ten people, whose weight considered as unhealthy, before and after they have cheated on their diet with a heavy meal.; Case Before After Difference (d;) 1 15 28 -13 35 35 3 16 35 -19 4 18 24 -6 15 19 39 -20 17 32 -15 27 27 18 16 29 -13 13 36 -23 10 20 35 -15 Sample Mean 19.6 32 -12.4 Sample Standard Deviation 6.60 4.78 8.00 80% confidence interval for the difference between population means is + Population mean anxitey levels before cheating wiyh a heavy meal is after with 90% confidence.