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So a z score of 1 5 means that a value is 1 5 standard deviations below the mean.
Mean score math. Z score of a value that value minus the mean standard deviation. 8 9 10 10 10 11 11 11 12 13 10 105 10 10 5 the median is the middle value. 668 divided by 9 74. Total score of the original group 65 20 1 300.
Total score mean number of students. Total score of the original group scores of the 2 new students. Total score of the new group. Number of students in the new group.
For our example we need to add the nine quiz scores together and then divide the sum by nine. The mean score for the math level 1 exam was 610 and the mean score on math level 2 was 698. So the rounded average or mean score is 74. 1 300 89 85 1 474.
The mean is the usual average so i ll add up and then divide. 91 84 56 90 70 65 90 92 30 668. For those who don t the mean is the average of a set of numbers. If you remember the words mean and standard deviation from your statistics class you re one step ahead.
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