Measures of Centers/Variability
Range, IQR, MAD are measures of?
Mean and medians are measures of?
Range, IQR, and MAD are measures of variability.
Mean and median are measures of center.
Find the constant of proportionality for the following set of points.
{ (2, 1) (4, 2) (8, 4) (16, 8) }
k=2
After Batman brought the Joker to justice, the crime rate in Arkham City decreased by 12%, percent. Previously, the crime rate was c incidents per 1000 people.
Which of the following expressions could represent the crime rate in Arkham City after Batman brought the Joker to justice?
a. c - 0.88
b. 0.88c
c. 0.12c
d. c - 0.12
B. 0.88c
Solve for n.
2n + 6 = 46
n =20
Simplify the following expression.
(30/5) + 2 x 32
24
When there is greater variability, the data is...
There should be three statements.
This is a bonus question worth 400 points!
Data is:
1. More spread out
2. Less consistent
3. Harder to predict
Simplify the following constant of proportionality.
180/240
3/4
How much would a bicycle cost if it were marked down 15% from its original price of $289?
$245.65
Solve for n.
83 = -3n - 25
n=-36
6(5 x 3) + 8/2 - 6 +3
91
The mean of the data set: 11, 26, 16, -4, 13, -6, -5, 9
7.5
The boys in a class compared to the girls are in a ratio of 4 to 5 If there are 16 boys how many girls are there?
20 girls
A certain mouthwash is on sale for $2.99. This is after a 20% discount. What is the original price of the mouthwash?
$3.74
Solve for n.
5n + 30 - 2n = 60
n = 10
Simplify the following expression.
5 x 2 + 10 -3 x 52
-55
The median of the data set: 3.6, 10, 7.4, 5.3, 8.8, 6.1
5.7
Last week Bill earned $210 for a 30-hour week. What was his pay rate? What would he have earned for a 40-hour week?
$7 per hour.
In 40-hours, Bill will make $280.
A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it. What percent of water evaporated?
20%
Solve for n.
(n/3) - 17 = 4
n = 63
Simplify the following expression.
5 x 4 (10 x 2) +6
406
The mean absolute deviation of the data set: 12, 7, 8, 15, 17, 18, 7
4
If a trail mix consist of 5 parts cashews and 3 parts raisins, how many ounces of cashews was used for 160 ounces of trail mix?
100 oz
A stereo has a price tag of $59.99. After taxes, the total bill came out to be $64.19. What is the sales tax on the item?
7%
Solve for h.
3.3h - 3 = 15 - 1.2h
h = 4
Simplify the following expression.
4 + 2(82 + 4x) - 2x + 20/4
6x + 137 OR 137 + 6x