If the line is pointing down it's negative. if the line is pointing up it's positive. if the line is steep is one of the whole numbers and if the line is more shallow it's one of the fractions. -it's positive 3.
QUESTION 34
We want to find the variance of .
The variance can be calculated using the formula,
where
This means that,
This gives us,
QUESTION 35
We want to find the variance of .
The variance can be calculated using the formula,
where
This means that,
This gives us,
QUESTION 36
We want to find the variance of .
The variance can be calculated using the formula,
where
This means that,
This gives us,
Step-by-step explanation:
a (-infinite , -3) U (3 , infinite)
b + 5 , - 5
Answer:
12.3 grams
Step-by-step explanation:
When a constant value is added to each data element in a distribution, the maen changes by that constant but the standard deviation stays the same. This is because the standard deviation is a measure of how distant the data are from the mean. When a constant value is added to each of them, the mean also gets the increment. Hence, the distance from the mean is maintained.
However, if the data were multiplied by a constant factor, then the standard deviation will be multiplied by the same factor as well as the mean.
Therefore, the standard deviation from the question remains the same as before, 12.3 grams.