'The scores on a standardized test are normally distributed with mean of 95 and standard deviation of 10. What test score is 2.3 standard deviations above the mean?'
Added by Alfredo M.
Step 1
3 standard deviations above the mean. To find the value of 2.3 standard deviations above the mean, we need to use the formula: z = (x - μ) / σ where z is the number of standard deviations from the mean, x is the test score we want to find, μ is the mean, and σ Show more…
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