professor taught a few classes the following grade averages for the classes were, 82%, 86%, 91%, 74%, calculate the mean?
2 answers:
Hi Annag88,
Your Question:
Professor taught a few classes the following grade averages for the classes were, 82%, 86%, 91%, 74%, calculate the mean?
Definition:
Mean - "is the average of the numbers: a calculated "central" value of a set of numbers. To calculate it: add up all the numbers, then divide by how many numbers there are."
Solution:
= 333 ÷ 4
= 83.25%
Final Answer:
Mean = 83.25%
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The proportion is 0.4401.
We find z-scores that correspond with both ends of this interval. Z-scores are given using the formula:
For the lower end,
The proportion of scores to the left of this number is 0.2514.
For the higher end, the z-score is
The proportion of scores to the left of this number is 0.6915.
To find just the proportion of scores between these two, we subtract;
0.6915-0.2514 = 0.4401.
We find z-scores that correspond with both ends of this interval. Z-scores are given using the formula:
For the lower end,
The proportion of scores to the left of this number is 0.2514.
For the higher end, the z-score is
The proportion of scores to the left of this number is 0.6915.
To find just the proportion of scores between these two, we subtract;
0.6915-0.2514 = 0.4401.