'The scores on a standardized test are normally distributed with a mean of 120 and standard deviation of 5. What test score is 0.3 standard deviations above the mean?'
Added by Isabel C.
Step 1
3 standard deviations above the mean. To do this, we need to multiply the standard deviation by 0.3 and add the result to the mean: 0.3 x 5 + 120 = 121.5 So, a test score that is 0.3 standard deviations above the mean is 121.5. Show more…
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