Name the Test
Mrs. Garcia found the National mean score for the AP Stats exam to be a 2.89. She wants to know if the Boise high school student's mean score on the AP Statistics exam is different than the national mean.
What is a 1 sample T-Test for a mean?
Two events that have no outcomes in common.
What are disjoint events or mutually exclusive events?
A local TV news station has a daily poll that they ask their viewers. Every day at 5:00 PM they put up a QR code on the screen and anyone who is watching and would like to respond may do so and answer the question.
What is voluntary response bias?
Characteristics needed when describing the distribution of a quantitative variable.
What is variability, outliers/other, center, and shape?
This measure of center is more resistant to outliers than the mean.
What is the median?
Mr. Jackson bought a jumbo bag of skittles and is curious to see if his ratio of green, red, yellow, purple and orange skittles matches the ratio described on the skittles website. He counts out the amount of each color he has and decides to run a ________ Test to see if it matches the historical ratio.
What is a Chi Squared Goodness of Fit Test?
The effects of two variables on the response cannot be distinguished from each other.
What is confounding?
An airline company wants to survey its customers one day, so they randomly select 5 flights that day and survey every passenger on those flights.
What type of sample is this?
What is a cluster random sample?
The interpretation of the correlation coefficient.
What is "strength, form, and direction" in context?
Stem plots, histograms, box plots, bar graphs, dot plots and scatter plots can be used to display this kind of data.
What is quantitative data?
A hospital reported 5 c-section births out of 89 patients under the age of 38. The same hospital reported 9 c-section births out of 56 patients over the age of 38. This test should be used to see if there is a difference between the 2 groups.
What is a 2 proportion Z test?
P(A)=P(A|B) and P(B)=P(B|A)
What are independent events?
A television reporter wants to determine if Maryland residents would be interested in renovating Camden Yards, Baltimore's baseball field. The reporter asks baseball game attendees at Camden Yards if they support the idea.
What is convenience sampling?
You have a normal distribution; this many standard deviations is what 95% of the values lie within.
What are two standard deviations?
(Also accepted: What are 1.96 standard deviations?)
The proportion of all females that are taller than 5'5" if the mean height is 5'4" and the standard deviation is 2".
What is 0.309?
A track coach wants to see if her training is leading to improvement in her sprinters. She has them all run a 100m at the beginning of the year and records their times. Then, after a full season of training, she has them run the 100m again in the same conditions (same track, same weather, etc.). She then records their new times. She runs a test to see if there is a difference between their times at the beginning of the season and at the end of the season.
What is a Matched Pairs T-Test or 1 sample t-test for a mean difference?
A random variable that has a constant probability of success, independence between trials, outcomes that are success or failure, and the trials continue until the first success occurs.
What is a geometric distribution?
A survey was sent out on a new phone app to try to get information about all people in the United States. However, mainly younger Americans (aged 14-30) have this app on their phone. This is an example of ___.
What is nonresponse bias? (also acceptable with explanation: What is undercoverage?)
The probability that I see more than 2 sixes when rolling a single fair die 5 times.
What is 0.035?
How can you find whether or not a data point is an outlier mathematically?
What is
> Q3 + 1.5(IQR)
< Q1 - 1.5(IQR)
An AP statistics teacher wonders if there is a association between taking statistics and calculus at the same time and good performance on the AP Statistics test. She samples students from 3 groups: Students taking AB Calc and Statistics, students taking BC Calc and Statistics, and students only taking Statistics. Then she looks at how many students in each group scored a 1, 2, 3, 4, or 5. This inference procedure can determine whether the proportion of students who perform well on the test differs between which/how many math courses they are taking.
What is Chi Square Association Test or a Chi Square Test for Homogeneity?
An airport screens bags for forbidden items, and an alarm is supposed to be triggered when a forbidden item is detected. Suppose 5% of bags contain forbidden items. If a bag contains a forbidden item, there is a 98% chance that it triggers the alarm. If a bag does not contain a forbidden item, there is an 8% chance that it triggers the alarm.
Given a randomly chosen bag triggers the alarm, what is the probability that it contains a forbidden item?
What is 0.392?
A truck manufacturer selects 3 trucks at random from each of 6 models for safety testing. What type of sample is this?
What is a stratified random sample?
SD(X) = 3
SD(Y) = 5
SD(X-Y)= ?
What is 5.831?
Write the conclusion for a 95% confidence interval (-4.25,-1.33) for the average drop in Q3 grades.
What is "We are 95% confident that the true drop of Q3 grades is between -4.25 and -1.33"?