This graph shows the relationship between two quantitative variables.
What is a scatterplot?
100
In this sampling design, the population is divided up into several subpopulations that are homogeous and random samples are drawn from each group.
What is stratified random sample?
100
Before the passage of the new business assistance act, 65% of all new businesses closed their doors within one year of opening. 52 businesses that have opened since are tracked. Has the business failure rate declined since the passage of the act?
What is 1-proportion z test?
100
Two events are this if they share no outcomes in common.
What is disjoint or mutually exclusive?
200
These are the four feature you describe when describing a distribution.
What is center, shape, spread, and outliers?
200
These are the four features that you describe when describing a scatterplot.
What is direction, form, strength, and outliers?
200
Bias introduced in a sample when individuals can choose on their own whether to participate is the sample.
What is voluntary response bias?
200
Are people who drink coffee more stressed than those who do not drink coffee? 300 coffee drinkers and 200 non-coffee drinkers were tested for stress level (on a 100 point scale).
What is 2- sample t test?
200
This states that the long-run relative frequency of repeated independent events settles down to the true relative frequency as the number of trials increase.
What is the Law of Large Numbers?
300
These measures for center and spread are appropriate for skewed distributions.
What is median and IQR?
300
This variable goes on the x-axis and this variable goes on the y-axis.
What is the explanatory on the x-axis and the response on the y-axis?
300
A study based on data in which no manipulation of factors has been employed.
What is an observational study?
300
Does meditation lower stress? The average stress level is 42. 87 people who meditated average 38. What can be concluded?
What is 1- sample t test?
300
Events A and B are independent when P(B|A) = this.
What is P(B)?
400
These graphs show the 5 number summary.
What is box plots?
400
These are the two items you check to see whether a linear regression is appropriate.
What is the scatterplot and the residual plot?
400
This technique removes variability due to differences in attributes of the subjects.
What is blocking?
400
What is the income difference between Republicans and Democrats? Income data for 400 Republicans and 600 Democrats was collected.
What is 2-sample t interval?
400
This is the difference between a binomial model and a geometric model.
What is a binomial model counts the number of successes in n trials?
500
Using N(1152, 84), the Normal model for weights of Angus steers, this percent of steers weigh over 1250 pounds.
What is 12%?
500
This value is the fraction on variance accounted for by the linear regression model.
What is r squared?
500
These are the four principles of experimental design.
What are control, randomization, replication, and blocking.
500
What percent of new calculators are defective? A study was done on 4,000 calculators?
What is 1-proportion z interval?
500
To find the probability than an event and another independent event both happens, do this to their probabilities.