Sampling
Probability
Tests and Intervals
Procedures
Miscellaneous
100
One effective sampling method
What is Simple-/Stratified-/Cluster-/Systematic- random sample?
100
The acronym for conditions for a binomial distribution.
What is BINS?
100
What does a normal distribution look like?
What is... 
100
Lylah created an app, and she recently updated the app. She randomly samples a group of users to estimate what percentage of all users are using the updated version.
What is a z-interval for a proportion
100
The formula to calculate the one-sample z statistic.
What is z = (p hat minus P) divided by (p hat times (1-p hat) n) ?
200
One type of bias when sampling.
What is response bias/non-response bias/undercover age bias?
200
The equality to prove independence of two events.
What is P(A)=P(A|B)=P(A|Bc)?
200
What is a way to determine a normal t-distribution?
What is normal population distribution/central limit theorem/normal sampling distribution.
200
Angelica surveyed people in the age group and people in the age group about whether or not they were vegetarian. She wants to estimate the difference between the percentage of people in each group who are vegetarian.
What is a two-sample z-interval for the difference of proportions
200
This measure of center is more resistant to outliers than the mean.
What is the median?
300
The mistake with this written out random digits sampling procedure for sampling without replacement:
- Label the list of 24 schools 01-24
- Starting on a randomly selected line reading left to right, record two-digit integers
- Ignoring integers outside of 01-24, record 3 integers
- Identify the three schools that correspond to the selected integers
What is not ignoring repeats nor stating unique integers?
300
The shape of a geometric distribution.
What is skewed right?
300
The condition for normality in a linear regression test for slope.
What is the dotplot of the residuals shows no strong skews nor outliers?
300
A school counselor suspects that, on average, students at their school are sleeping less than hours per night. They survey a random sample of students about how many hours they slept the previous night to see if their average sleep amount is significantly less than hours.
What is a test for a mean
300
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normalcdf?
400
Importance of specifying whether sampling with or without replacement.
What is when sampling without replacement, the probabilities will change after each selection?
400
The difference between Discrete and Continuous variables.
What is Discrete variables are a fixed value with gaps in between while continuous data can be any value?
400
The calculation for D.F. of a Chi-squared test for homogeniety.
What is (rows-1) x (columns-1)?
400
Marta runs a website, and she knows that almost all visitors arrive to her site from a web search, from social media, or directly by entering the website’s address. She made a change to the website, and she wonders if it impacted the ways people navigate to the site. She took a random sample of visits before she made the change, and a separate random sample of visits after she made the change.
What is a test for homogeneity
400
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
500
A small trial run of a survey checking clearness of questions which prevents ambiguous questions for surveys.
What is a Pilot Survey?
500
What is this called: If one does something many many times, the proportion of desired outcomes approaches its probability.
What is the law of large numbers.
500
A reason not to pool with inference procedures for two sample proportional data.
What is a Confidence interval?
500
According to the distributor of a kind of trading card, of the cards are common, are uncommon, and are rare. Avery wondered if the rarity levels of the cards she and her friends owned followed this distribution, so she took a random sample of cards and recorded their rarity levels.
What is a goodness of fit test
500
Confidence interval for slope beta of a true regression line
b +/- t*SE sub b