Solution: We are given:

Using the empirical rule, we have:
covers 68% of data.
Also the percentage of values below mean = Percentage of values above mean = 50%
Now, let's find the z score for x=20

Therefore, the percentage of values greater than 1 standard deviation above mean 
Expected number of students = 16% of 100 = 16
Answer:
The answer is 6 units! Have a nice day! :D
Step-by-step explanation:
Answer:
7/8
Step-by-step explanation:
Answer:
-4
Step-by-step explanation:
Answer:
Please find solution in the picture attached
Step-by-step explanation: