Basics
What is the sample space for two rounds of rock-paper-scissors?
RR, RP, RS, PP, PR, PS, SS, SP, SR
What goes in the middle of a probability venn diagram?
P(AandB)
What are the four conditions to prove a variable is binomial?
1. Independence
2. Fixed number of trials
3. Constant probability of success
4. Binary
What are the four conditions to prove a variable is geometric?
1. Binary
2. Constant probability of success
3. First chance of success
4. Independence
How do you know something is normally distributed?
The scenario tells you
What is the complement of an event?
The probability of an event not happening
What would go in the left part of a venn diagram assuming P(A) = 0.4 and P(AandB)=0.22
0.18
What are the things to identify to run a binomial pdf or cdf test?
probability of success:
x value:
What are the things to identify to run a geometric pdf or cdf test?
probability of success:
x value:
What do you need to identify to run a normal pdf or cdf test?
Lower bound:
Upper bound:
mean:
SD:
What is the intersection of two events?
Both events happening
8
According to the US Census Bureau, 74.8% of households in the US had home internet access in 2012. We are interested in looking at 10 of them to see if they had access. What is the probability that exactly 7 of 10 have access?
0.25
About 10% of the population is left-handed. You are randomly selecting people from the population until you get a left hander. What is the probability that the first person you talk to who is left handed is exactly the 6th person you talk to?
0.06
What do you need to identify in order to run an invNorm test?
area:
mean:
SD:
What is the complement of an event that has a probability of 0.35?
0.65
What is a path for a tree diagram (from start to end with probabilities) of a tree diagram for 3 coin flips?
HHH 1/8, HHT 1/8, HTH 1/8, THH 1/8, HTT 1/8, THT 1/8, TTH 1/8, TTT 1/8
According to the US Census Bureau, 74.8% of households in the US had home internet access in 2012. We are interested in looking at 10 of them to see if they had access. What is the probability that at least 7 of 10 have access?
0.48
About 10% of the population is left-handed. You are randomly selecting people from the population until you get a left hander. What is the probability that the first person you talk to who is left handed will happen by the 6th person you talk to?
0.47
Birthweights of full-term newborns in the US are approximately normally distributed with a mean of about 3500 grams and a standard deviation of 450 grams. Birthweight is usually defined to be a newborn weight of less than 2500 grams. What proportion of the births in the US result in low birthweights?
0.013
What is the union of the following probabilities?
P(A) = 0.2
P(B) = 0.8
P(AandB)=0.6
0.4
Create a tree diagram for playing 2 rounds of rock paper scissors. What is the summary section?
RR 1/9, RP 1/9, RS 1/9, SS 1/9, SP 1/9, SR 1/9, PP 1/9, PS 1/9, PR 1/9
According to the US Census Bureau, 74.8% of households in the US had home internet access in 2012. We are interested in looking at 10 of them to see if they had access.What is the mean and standard deviation?
mean = 7.48
SD = 1.37
About 10% of the population is left-handed. You are randomly selecting people from the population until you get a left hander. What is the mean?
10
Birthweights of full-term newborns in the US are approximately normally distributed with a mean of about 3500 grams and a standard deviation of 450 grams. What birthweights are in the bottom 5%?
2759.8