```Question 275906
For a particular sample of 50 scores on a psychology exam,the following results were obtained.
First quartile=42 third quartile=74 Standard devation=8 range =56 Mean =58 Median=57 Mode=68 Midrange=61
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WHat score was earned by more students than any other score? 57 Why? It's the mode.
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what was the highest score earned on the exam?
That would be the top number on the range, which you did not list.
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What was the lowest score earned on the exam?
That would be the lowest number on the range.
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According to Chebyshev's therorem,how many students scored between 42 and 74?
42 is 2 std below the mean
74 is 2 std above the mean
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Ans: 95% of the scores would be between 42 and 78
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Assume that the distribution is normal.Based on the Empirical Rule, How many students scored between 42 and 74
z(42) = -2
z(74) = +2
P(-2 < z < 2) = 0.9545
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Cheers,
Stan H.
```