Variables
Linear Functions
Exponential Functions
Basic Stats
Distributions
100
Does the independent variable go with domain or range?
Domain
100
Does the following situation represent a linear or exponential function?
A car loses 10% of its value every year.
Exponential
100
Does the following situation represent a linear or exponential function?
The population of Meadow View is increasing at a rate of 300 people per year.
Linear
100
There is a 35% chance that it will rain today. What is the chance that it will not rain?
65%
100
Determine the shape of the distribution.
Right skew
200
Define the independent variable.
A study was done to see the effects of diet vs regular soda on blood sugar levels.
Type of soda (diet or regular)
200
The water depth in a lake decreases at a rate of 2 inches per day due to evaporation. How much does the water depth change in 15 days?
30 inches
200
Write an equation to model the situation.
China's population in 2013 was 1.3 billion. Suppose the population declines at a rate of 0.5% per year.
y=1.3 billion x (0.995)t
200
Determine if the question is better answered with an observational study or an experiment.
What is the average income of stock brokers?
Observational study
200
In a left skew distribution, the ____ is left of the _____.
Mean, median
300
Identify the dependent variable.
You jump from an airplane (with a parachute) and want to know how far you have traveled at various times during your descent.
How far you have traveled
300
Write an equation to model the situation.
Your job is to oversee an automated assembly line that manufactures computer chips. You arrive at work one day to find a stock of 25 chips that were produced during the night. During the day 4 chips get produced per hour.
y=4x+25
300
China's population in 2013 was 1.3 billion. Suppose the population declines at a rate of 0.5% per year. What will the population be in 2050?
1.08 billion
300
Determine the sampling method.
You are conducting a survey of students in a dormitory. You choose your sample by knocking on the door of every 10th room.
Systematic sample
300
The math portion of the SAT is normally distributed with mean of 500 and standard deviation of 100. What percent of scores are between 300 and 600?
81.5%
400
Atmospheric pressure changes with altitude. Pick out the range.
Points are (Altitude (ft), Pressure (in mercury))
(0,30), (5,000, 25), (10,000, 22), (20,000, 16), (30,000, 10)
10-30 (in mercury)
400
Find the rate of change.
When the price of pineapples is $2, the average demand is 80 pineapples. When the price of pineapples is $5, the average demand is 50 pineapples.
-10 pineapples/$1
400
Solve 9x=1748
3.40
400
Define a double blind experiment.
Neither the participants or administrators of the experiment know which participant is receiving what treatment.
400
A group of test scores is found to be normally distributed with a mean of 77 and standard deviation of 3. What percent of students got higher than 85 on the test?
0.28%
500
Non-math question: Which Hogwarts house does Ms. Lambert belong to?
Slytherin
500
A $1200 washing machine is depreciated for tax purposes at a rate of $75 per year. When does the depreciated value reach $0?
16 years
500
A deer population of 2000 is decreasing at a rate of 7% per year. How long will it take the population to reach 1250?
6.476 years
500
Find the 5 number summary for the following data:
4.1, 5.2, 5.6, 6.2, 6.7, 7.2, 7.7, 7.7, 8.5, 9.3, 11.0
Min: 4.1, Q1: 5.6, Med: 7.2, Q3: 8.5, Max: 11.0
500
The body mass indices of American men between ages 30 and 50 are normally distributed with a mean of 26.2 and a standard deviation of 4.7. What percentile is a BMI score of 29?
Between 72.24% and 72.57%