Answer:
1. 0.33 2. 0.16 3. o.11
Step-by-step explanation:
The possibile answer is 10 ÷ 6 = 1.6
R=10
because 10 divided by ten =1 +4 =5
Answer:
b. Kathy
Step-by-step explanation:
We compare each of their score by how far away from the mean when in term of the standard deviation. Using the following formula

For John he is (85 - 75)/5 = 2.
For Kathy she is (80 - 50)/10 = 3.
Since Kathy is 3 standard deviation better than her class' average, while John is only 2's. We conclude that Kathy did better.