Total Answers: 2 [Go Back]
1A) 22 1B) 72 1C) np 2) 5 6 6 6 7 7 8 9 9 11 12 12 17 18 Mean 9.5 Median (8 9)/2 8.5 Mode 6
Tue, 09 Mar 2010 17:23:15 GMT
TO FIND THE MEAN: add all of the scores you have together and divide it by the number of scores you added together. 1. If you knew Katie's last exam score and wanted to find the mean you would set it up like this: 76+74+90+88+(LAST EXAM SCORE) - (MEAN OF ALL 5 EXAMS) 5 -For questions A, B, and C: You don't know the LAST EXAM SCORE, but they do give you the MEAN OF ALL 5 EXAMS. So you can plug this into the formula and use it to solve for the LAST EXAM SCORE. A. So here is what you have to start with: 76+74+90+88+(LAST EXAM SCORE) 70 5 You want to get the (LAST EXAM SCORE) alone on one side of the sign. soo.multiply each side by 5 to cancel out the 5 on the left 76+74+90+88+ (LAST EXAM SCORE) x 5 70 x 5 5 .soo. 76 74 90 88 (LAST EXAM SCORE) 350 .soo. 328 (LAST EXAM SCORE) 350 .now subtract 328 from each side. 328 (LAST EXAM SCORE) 328 350 328 soo. (LAST EXAM SCORE) 22 If you want to test your answer out you can put it in the place of (LAST EXAM SCORE) in the original formula for the mean and see if you get 70 as the mean. -For B and C use the same process.
are the answers I got: B) 72 C) 122 that score is too high so it is impossible to get a mean of 90) so like you said. np 2) Find the MEAN: Add them together and divide by 14 because there are 14 scores total. 1323 14 9.5 MEDIAN: put the scores in order from lowest to highest and choose the one in the middle. 5, 6, 6, 6, 7, 7, 8, 9, 9, 11, 12, 12, 17, 18 There are an even number of scores so 8 and 9 share the middle. So you have to choose the point between those two which is 8.5 so your median is 8.5 MODE: just find the score that appears the most In this case it is 6 Hope this helps!
are the answers I got: B) 72 C) 122 that score is too high so it is impossible to get a mean of 90) so like you said. np 2) Find the MEAN: Add them together and divide by 14 because there are 14 scores total. 1323 14 9.5 MEDIAN: put the scores in order from lowest to highest and choose the one in the middle. 5, 6, 6, 6, 7, 7, 8, 9, 9, 11, 12, 12, 17, 18 There are an even number of scores so 8 and 9 share the middle. So you have to choose the point between those two which is 8.5 so your median is 8.5 MODE: just find the score that appears the most In this case it is 6 Hope this helps!
Tue, 09 Mar 2010 18:08:32 GMT