Probability and Stats Review

Question 1

With a score of 680 on a test with mean 560 and standard deviation 70 what is the percentile?

Accepted Answer

0.9564

Question 2

What is the probability of selecting 3 red balls from a bag with 6 red and 4 blue?

Accepted Answer

1/6

Question 3

Two dice are rolled. What is the probability that the sum is 4?

Accepted Answer

3/36

Question 4

If P(A)=0.3 and P(B)=0.4 and A and B are mutually exclusive then P(A∪B)=?

Accepted Answer

0.7

Question 5

If event A=flip a heads on a coin and event B=roll a 5 on a dice then A and B are

Accepted Answer

independent

Question 6

How are you feeling about the final exam?

Accepted Answer

:(, >:{0, :|, :)

Question 7

How do you feel about the probability and statistics exam?

Accepted Answer

:(, >:{0, :|, :)

Question 8

If P(A∩B)=0.4, P(A∪B)=0.7 and P(B)=0.6 what is P(B|A)?

Accepted Answer

4/5

Question 9

What is the unbiased sample variance of the data set: 1,3,4,8.

Accepted Answer

26/3

Question 10

A class has 24 students.What is the probability that 2 or more students have the same birthday?

Accepted Answer

0.538

Question 11

The distribution of grades on the SAT is called:

Accepted Answer

the gaussian, the bell curve, the normal distribution

Questions 11