Add all of the scores you had (x) and then times the amount of tests (b) that you had by 100 (y), then use y-x= the overall score, now we need to find the average (a).
use x÷b=a
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An average is worked out by dividing the total of the scores by the number of scores. You have 4 scores already so when you have done the next test it will be 5 scores. If you multiply 5 scores by 90 it gives you a total score of 450. The 4 scores you already have adds up to a total of 354. If you subtract 354 from the 450 you get 96 and that is your target for the final test. The average for the first 4 tests comes out at 88.5
190-195. I got those scores in 2nd grade but they should be average in 3rd grade.
I was given this formula in college: IND Posttest score - IND pretest score ______________________________ = Improvement Score Highest score for all - IND pretest score
To find the average, add the scores and divide the sum by how many scores you are adding: 81 + 76 + 91 + 73 + 79 = 400 ÷ 5 = 80.
Outliers, that is scores outside the expected range can distort the average score for the test. As a result, many teachers will dismiss the high and low score in averaging the test and establishing the curve for grading. This theory is why the median can be more valuable than the mean in evaluating test performance.