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scatter plots
lines of best fit
volcabulary
independent events
the probability formula
100
When one value increases in a POSITIVE CORRELATION, what will the other value do?
The other value increases.
100
What is drawing a line of best fit for in graphs?
For predicting and estimating.
100
Define sampling.
A representative portion of a population.
100
What do we use to determine the probability of independent events?
A tree diagram.
100
There are 6 cards, and each card has a number on it. The numbers are : 723598. Find the probability of choosing an odd number in fraction.
2 over 3.
200
What does it mean when the graph is NO CORRELATION?
There does not appear to be a relationship between the values.
200
What do we do before placing a ruler when drawing a line of best fit?
Plot the ordered pairs corresponding to the given data.
200
What is bias?
An emphasis on characteristics that are not typical of the entire population.
200
If you toss a coin 3 times, or your toss 3 coins once, what is the probability of getting 2 heads and 1 tail?
3 times
200
A paper bag contains 40 balls, there are 8 orange, 2 blue, 5 green, 1 pink, 2 red and yellow. The person has 20% of the yellow ballsand and orange balls. True or False? If False, please write down your answer.
False. [8+(40-8-2-5-1-2)]÷40×100%=25%
300
What is a scatterplot used for?
A scatterplot is used to show wether or not a relationship exists between two variables.
300
What's the diffrence between an extrapolate and an interpolate?
An extrapolate makes a prediction outside of the given data, and interpolate makes a prediction between the given data.
300
What is population?
The set of all things or people being considered.
300
What is the formula for INDEPENDENT EVENT?
P(A and B) =P(A) × P(B)
300
What is the formula for probability of a single outcome?
Probability of an outcome number of favourable outcomes total number of possible outcomes
400
List the three correlations of scatterplot.
Positive correlation, negative correlation, and no correlation.
400
When data points lie close to the line of best fit, we say that we have a ____________________ and we can use the line to predictdata. When many data points are scatteded far from the line of best fit, we say that we have a _________________. Predictions are therefore less reliable.
Strong Relationship, Weak Relationship.
400
What's the difference between a representative sample and a random sample?
A representative sample is a sample that represents the majority of the population.A random sample is a sampling in which all members of the population have an equal chance of being selected.
400
Cindy and Ada bought some fruits for tommorrow's party. Out of every 10 bags of fruit that they look at, 4 of them are apples and 6 of them are bananas. If Cindy and Ada each choose one bag of apples, what is the probability of them both choosing a bag of apples? (In fractions)
2 over 5
400
What is the formula for RELATIVE FREQUENCY?
relative frequency= # of times that the outcome occur ÷ total numbers of outcomes
500
Describe the three correlations of scatterplot.
When a value increases, the other value increases. This is called a positive correlation. When one value increases, the other decreases. This is called a negative correlation. When there does not appear to be a relationship between the values. There is no correlation there.
500
Point that are close from the line of best fit are called outliers. True or False.
False
500
What is the name of points that are a long way from the line of best fit?
Outliers
500
A die rolled. For the first time, it rolled a 2. For the second times, it rolled a 6. For the third times, it rolled a 1. What is the probability of these three numbers?
1 over 6
500
You have 52 cards deck, then you give this card for 4 people A, B, C and D. A has 2 Queens, B has 1 Jack, C has 3 Kings and D has 2 Jacks. Then A discards 1 Queen, B discards 2 Queens, C discards 1 King and 1 Jack, D discards 2 Jacks. What is the probability of Kings and Jacks that they have right now?
9%