Answer:
B. 78 and 82.
Step-by-step explanation:
We have been given that the average test score of the class was an 80 and the standard deviation was 2. We are asked to find two values between which 68% of class will score.
We know that in a normal distribution approximately 68% of the data falls within one standard deviation of the mean.
So 68% scores will lie within one standard deviation below and above mean that is:
Upon substituting our given values, we will get:
Therefore, about 68% of the class would score between 78 and 81 and option B is the correct choice.
Answer:
100•(0.7)3•(1-0.7)5-3
100•0.7•3•0.3•5-3
315-3
312
Answer:
c^d or -5^2
Step-by-step explanation:
The answer is 16, all you must do is substitute x with the given value then solve, so 23-7
Step-by-step explanation:
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