Descriptive Statistics
The process for finding mean.
What is "Add up all the values in the distribution and then divide by the number of values in the distribution"?
You use this rule when you're trying to find the probability of A or B.
What is the Addition Rule?
The table we use when finding or working with t
What is Table B?
The hypothesis we hope or suspect might be true.
What is the Alternative Hypothesis?
This type of bird can't fly, but it known for swimming?
What are penguins?
This proportion of the Normal Curve is within two standard deviations of the mean.
What is 95%?
When one outcome does not influence another.
What is independence?
The z* for an 80% confidence interval.
-1.28
The alpha we assume if we're not given one.
What is 0.5 (or 5%)
These fast-flitting friends are the only birds that can fly backwards.
What are hummingbirds?
This measure tells you what percent of data points are below yours.
What is percentile?
The probability of A given B.
What is conditional probability?
One of our conditions for a confidence interval. The sample must be less than ___ of the population.
What is 10%
What we do if the probability of getting our results with the null hypothesis is less than alpha.
What is "reject H0"
The deadliest mammal in the world.
What is Hippo?
The grades on a history midterm at Almond are roughly symmetric with mean of 85 and standard deviation of 2.0. Michael scored an 86 on the exam. What is Michael's z-score?
What is 1/2?
The mean of a binomial distribution.
What is mu=n*p
The condition that says our sample must be above 30 or a certain shape
What is Normal/Large?
The best alternative hypothesis for the following scenario.
Market researchers conducted a study comparing the salaries of managers at a large nationwide retail store. The researchers obtained salary and demographic data for a random sample of managers.
The researchers calculated the average salary of the men in the sample and the average salary of the women in the sample. They want to test if managers who are men have a higher average salary than managers who are women. Assume that all conditions for inference have been met.
Ha: mean for men - mean for women > 0
Or
Ha: mean for women - mean for men < 0
In Alaska, it is illegal to whisper in someone's ear while hunting this mammal.
What is "moose?"
The measure of how many standard deviations I am from the mean.
What is z-score?
The equation for finding the probability of A and B
What is P(A)*P(B)?
A random sample of 16 students were asked how much sleep they get on a typical weekend night. The sample data were roughly symmetric with a mean of 8.75, and a standard deviation of 1.5 hours.
Based on this sample, which of the following is a 90%, percent confidence interval for the mean amount of sleep (in hours) this population of students gets on a typical weekend night?
8.75 +/- .657
The type of error where we reject a true null hypothesis.
What is Type I error?
This type of whale makes an appearance in Melville's classic novel.
What is Sperm Whale?