the scores on a psychology assignment were normally distributed with a mean of 66 and a standard deviation of 8. 1. about what percentages of the scores were greater than 83? 2. if 200 students did the assignment , approximately how many students scored above 59? 3. What is the standard score for a score of 71? 4. what is the standard score for a score of 55?
Added by Robert C.
Step 1
To find the percentage of scores greater than 83, we need to calculate the z-score for 83 and then use a standard normal distribution table to find the corresponding percentage. z-score = (83 - 66) / 8 = 2.125 Using a standard normal distribution table, we Show moreā¦
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