Write your answer as a fraction or as a whole mixed number 16 3/4 - 8 1/4=
1 answer:
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Answer: Not unusual.
Step-by-step explanation:
We know that the z-scores lower than -1.96 or higher than 1.96 are considered as unusual.
Given : Sample size : n= 65
Sample mean =
Standard deviation :
Formula for z-score :
At x= 213
Since , -1.96< 0.17 <1.96
It means the probability of a sample mean being greater than 213 is not unusual.