Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 15. Use the 68-95-99.7 rule to find the following quantities. a. The percentage of scores less than 80 is 50%. (Round to one decimal place as needed.) b. The percentage of scores greater than 95 is 16.0%. (Round to one decimal place as needed.) c. The percentage of scores between 50 and 95 is nothing%.

a. Percentage of scores less than 100 50%

b. Relative frequency of scores less than 120:::(50+34)%

c. Percentage of scores less than 140(50+47.5)%

d. Percentage of scores less than 80(50-34)%

e. Relative frequency of scores less than 60(50-47.5)%

f. Percentage of scores greater than 120:::(50-34)%

Step-by-step explanation:

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