3 Types of Probability
"I eat healthy, so my chances of getting COVID are less."
What is subjective/personal probabilty?
A U B
The three values that can always be found right at the middle of the set,if the variable is normally distributed.
What are the mean, median, and mode of the data?
Formula for converting a raw score to a z-score
What is raw score minus the mean, divided by the standard deviation?
A person has a depression score that is the mean for everyone who took the measure. What percentile are they in on this measure of depression?
What is the 50th percentile?
The probability of drawing a jack of hearts in a fair deck of cards is about .02 (not very good)
What is classical probability?
What are mutually exclusive events?
Term that describes the fact that the two halves of the curve have exactly the same shape.
What is symmetry?
Formula for converting a z-score to a raw score
What is (z-score times the standard deviation) + the mean
80% of people have a value or score lower than yours. You can talk about this as a percentile...
What is being in the 80% percentile?
I won't win the raffle; I never win anything.
What is subjective probability?
Term for two events for which the probabilities of one happening or the other happening always sum to 1.0
Complementary events
Portion (probability) of the normal curve that is between 1 and 3 standard deviations from the mean, counting both below and above the mean?
What is .318 (31.8%)
The z-score for a score that is 2 standard deviations above the mean
What is +2.0
Z-score you would need to achieve in order to be in the 84th percentile on your Chemistry exam?
z of 1.0 (only about 16% of scores are higher than yours)
The probability of a golden retriever being certified as a service dog, based on the data, is .68.
What is relative frequency probability?
A ∩ B
What is the probability of A AND B both happening?
Portion (probability) of scores or values that are within one standard deviation from the mean
What is 68.2% (.682)
Something you know right away about a negative z-score
What is that the raw score is below the mean score?
This is the way to calculate a percentile.
What is 'convert score to a z-score, find the probability associated with that z-score, draw it. Based on your sketch decide whether that probability converts directly to a percentile OR if you need to subtract that probability from 1.0.
There are 30 people here, and each person got one raffle ticket. The probability of me winning the raffle is 1 of 30, or .03.
What is classical probability?
Probability of an event taking place IF another event has already taken place.
What is a conditional probability?
Term for a normal curve that shows probabilities associated with z-scores rather than raw scores.
What is the standard normal curve?
The mean number of days for a human pregnancy is 266 days with a standard deviation of 16 days, Interpret that and give an example of a length of pregnancy you'd expect to see in the data.
What is" the average number of days that pregnancies deviate from the mean of 266 days is 16 days.' So, pregnancies of 250 days or 282 two days are fairly common (for example)
The most difficult topic from Weeks 4,5,6
What is...??? Ask about it!