Correlation Coefficient
Find the correlation coefficient. Round to 4 decimal places.
0.7862
Compute the least-squares regression equation for the given data. Round to 2 decimal places.
Y = 12.70 + 0.81x
What is the sample space of a six-sided die?
1, 2, 3, 4, 5, 6
If P(A) = 0.2 and P(B) = 0.5, and P(A and B) = 0.7, are A and B mutually exclusive? Why?
Yes, because 0.2 + 0.5 = 0.7
A six-sided die is tossed 3 times. What is the probability that the result is 2 every time? Round to 4 decimal places.
0.0046
Determine whether the correlation coefficient is an appropriate summary for the scatterplot and why
The correlation coefficient is appropriate because the variables have a linear relationship
Find the LSR line for this data. Round to 4 decimal places.
x: 5, 7, 3, 6, 8
y: 9, 9, 8, 2, 6
y =8.8378 - 0.3514x
For a six-sided die, P(7) = ?
0
if P(A^c) = 0.78, P(A) = ?
0.22
DOUBLE POINTS
A six-sided die is tossed 3 times. What is the probability that the result is 4 at least once? Round to 4 decimal places.
0.4213
What type of correlation is there between brushing your teeth and having cavities?
Negative
Find the LSR line for this data. Round to 4 decimal places.
x: 5, 7, 3, 6, 8
y: 6, 4, 5, 7, 1
y = 8.6757 - 0.7027x
For a six-sided die, P(odd) = ?
0.5
Let A be the set of students who like math, and R be the set of students who like science. P(A) = 0.34, P(R) = 0.24, and P(A and R) = 0.03. What is the probability that a student likes math, likes science, or likes both?
0.55
You, your friend Chase, and 7 other students are being randomly selected to answer a homework question. What is the probability that Chase is chosen first and you are chosen second?
0.0139
Find the correlation coefficient. Round to 3 decimal places.
-0.969
If someone had a GPA of 2.50, what could we predict their hours spent playing video games to be?
12 hours
In a class of 104 students, 65 say they like statistics, 23 say they are neutral about statistics, and 16 say they dislike statistics. What is the probability that a randomly selected student likes statistics? Round to 2 decimal places.
0.63
What is the probability that a student uses a notebook? Round to 4 decimals
0.2901
Given that a random student uses a computer, what is the probability that the student is from an art class?
0.2969
What type of correlation is there between coming to class and getting good grades?
Positive
DOUBLE POINTS!
Compute the least squares regression equation for the given data. Round to 4 decimal places.
y= -0.2868x+6.7098
In a class of 104 students, 65 say they like statistics, 23 say they are neutral about statistics, and 16 say they dislike statistics. What is the probability that a randomly selected student dislikes statistics? Round to 2 decimal places.
0.15
What is the probability that a random student uses a tablet in their math class?
0.0440
Given that a random student uses a tablet, what is the probability that the student is not from a science class? Round to 4 decimal places.
0.7746