Constructing Lines of Best Fit
Where should a line of best fit be drawn?
a) In the middle of the data with half above and half below the line
b) Connecting each data point by passing through each point
a) In the middle of the data with half above and half below the line
You flip a coin twice. What is the probability of getting heads twice?
Express your answer as a simplified fraction.
1/4
A bag has four blue marbles and five red marbles. What is the probability of getting two blue marbles, without replacement?
Express your answer as a simplified fraction.
1/6
What is the relative frequency that someone surveyed is left handed?
Right Handed Left Handed Total
Male 82 23 105
Female 79 16 95
Total 161 39 200
Express your answer as a decimal rounded to the tenths.
0.2
What is the first step when finding a line of best fit?
a) Find two data points that are closest to the line.
b) Find two places that the line passes through, whether or not they are data points.
b) Find two places that the line passes through, whether or not they are data points.
You roll a number cube twice. What is the probability of getting a two and then a five?
Express your answer as a simplified fraction.
1/36
A bag has three white marbles, a yellow marble, and five red marbles. What is the probability of getting two red marbles, without replacement?
Express your answer as a simplified fraction.
5/18
What is the relative frequency that someone surveyed is a female?
Right Handed Left Handed Total
Male 82 23 105
Female 79 16 95
Total 161 39 200
Express your answer as a decimal rounded to the hundredths.
0.48
A line of best fit has a positive slope. What does this mean?
a) As x increases, y increases.
b) As x decreases, y increases.
c) As x increases, y decreases.
a) As x increases, y increases.
A bag has four blue marbles and five red marbles. What is the probability of getting two blue marbles, with replacement?
Express your answer as a simplified fraction.
16/81
A bag has the letters of the word MATHEMATICS in in. What is the probability of drawing two letters and getting an M then a C without replacement?
Express your answer as a simplified fraction.
1/55
What is the relative frequency of a person without brown eyes to all people surveyed?
Dark Hair Light Hair Total
Brown Eyes 148 106 254
Blue Eyes 93 128 221
Total 241 234 475
Express your answer as a simplified fraction.
221/475
A line of best fit has a negative slope. What does this mean?
a) As x increases, y increases.
b) As x decreases, y decreases.
c) As x increases, y decreases.
c) As x increases, y decreases.
You flip a coin twice. What is the probability of getting two different results (one time heads and one time tails), regardless of order?
Express your answer as a simplified fraction.
1/2
A bag has the letters of the word MATHEMATICS in in. What is the probability of drawing two letters and getting two vowels without replacement?
Express your answer as a simplified fraction.
6/55
What is the relative frequency of a person with dark hair and brown eyes to all brown eyed people?
Dark Hair Light Hair Total
Brown Eyes 148 106 254
Blue Eyes 93 128 221
Total 241 234 475
Express your answer as simplified fraction.
74/127