PSYCHOLOGYS HISTORY APPROACHES
SCIENTIFIC FOUNDATIONS OF PSYCHOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If the mean on a test is 90 with a standard deviation of 5, which score falls within 1 standard deviation of the mean?
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80
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82
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91
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96
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Explanation:
Detailed explanation-1: -To capture the central 90%, we must go out 1.645 standard deviations on either side of the calculated sample mean.
Detailed explanation-2: -90% of values fall within 1.65 standard deviations of the mean (-1.65s <= X <= 1.65s)
Detailed explanation-3: -Answer and Explanation: A sample with a standard deviation equal to 5 indicates that, on average, the distance between each data point in an entire dataset is different from the mean of the dataset by a value of 5.
Detailed explanation-4: -Percentile (from Chart) = .6808 = 68.08% A score of 90 on a test with a mean of 86 and a standard deviation of 18.
There is 1 question to complete.