Answer:
it's 4.5
Step-by-step explanation:
you have to find the difference between each number and the mean. then you find the mean of that sum
Don't look at this comment.. I messed up the first time so, yeah.
Answer: 24.7
cos 54° = x/42
⇔ x = 42. cos 54°
⇔ x ≈ 24.7
Step-by-step explanation:
The mean of the probability distribution is given by the expected value given by

The variance of the probability distribution is given by

The standard deviation is given by