For a language test with normally distriuted scores, the mean was 70 and the standard deviation was 10. Approximately what perce
ntage of test takers scored a 60 or above?
1 answer:
Answer: 84.13%
Step-by-step explanation:
Given : The scores in a a language test with normally distributed.
Mean : 
Standard deviation: 
Let x be the random variable that represents the scores of students.
Formula for z-score: 
For x= 60 , we have

The probability f test takers scored a 60 or above :-

Hence, the percentage of test takers scored a 60 or above = 84.13%
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