Probability & Chance
What is the probability of flipping heads on a coin?
50 percent
Which graph is best for showing changes over time?
Line Graph
What is the mean of 2, 4, 6, and 8?
5
What does a positive correlation mean?
As one variable increases, the other increases also.
What is a random sample?
A sample where every member of the population has the same chance of being selected.
What is the probability of rolling a 6 on a dice?
1/6
What type of graph uses bars to compare categories?
Bar graph
What is the median of 3, 5, 7, 9, and 11?
7
What does a negative correlation mean?
As one variable increases, the other decreases
What is the purpose of a control group in an experiment?
To provide a baseline for comparison.
True or False: Two coin flips are independent events.
true
In a scatterplot, what does each point represent?
One observation
What is the mode of 1, 2, 2, 3, 4?
2
What is the purpose of a line of best fit?
To model the relationship between two variables and make a prediction.
True or False: A biased sample represents the population fairly.
False
If a bag has 3 red marbles and 2 blue marbles, what is the probability of getting a blue marble?
2/5 = 40%
Which graph is commonly used to show the distribution of number data?
Histogram
Which measure of the center is most affected by outliers?
What does it mean if the correlation coefficient is close to 1?
A strong positive linear relationship
In an experiment, what is the independent variable?
The variable that is manipulated by the researcher.
What is the probability of drawing a heart from a deck of cards?
13/52 = 25%
What does a box plot show about a data set?
The distribution, median, and possible outliers
If all values in a data set are the same, what are the mean and median equal to?
The common value
What is a residual in regression?
The difference between the actual value and the predicted value.
What is the difference between an observational study and an experiment?
An observational study only observes something, while an experiment comes up with an answer.