Inference
Probability
Normal Model
Experiments and sampling
Miscellaneous
Final Jeopardy
100
The conclusion if the p-value of 0.001 given an alpha = 0.05.
What is "since the p-value is less than alpha = 0.05, we reject the null hypothesis, and conclude there is significant evidence to support the alternative hypothesis"?
100
This type of random variable requires a fixed number of trials, each observation to be independent, and to have two outcomes ("success" or "failure").
What is a binomial random variable?
100
This calculator command can be used to find the area under a normal distribution.
What is normalcdf?
100
This allows us to generalize our results to an entire population.
What is Random sampling?
100
Where did Mr. Wright go to Junior High School?
Harper Junior High School
100
Based on the summary statistics are there any outliers? Use the IQR formula to prove one way or the other on the whiteboard.
No, upper fence at 6.992 and lower fence at 3.0625.
200
The type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test?
200
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are mutually exclusive (disjoint) events?
200
This measure of spread is resistant to subtracting every value by 3.
What is the IQR, range, or standard deviation?
200
The population is divided into heterogenous groups. Some groups are randomly selected and all individuals in the chosen groups are sampled.
What is cluster sampling?
200
How many more times will this class meet after today?
12 more times
300
The three conditions needed for any test.
What are the random condition, 10% condition, and large counts/sample size condition?
300
The probability of rolling a fair six sided die and getting your first 4 on the third roll.
What is P(not 4)P(not 4)P(4) = (5/6)(5/6)(1/6) = 0.1157 = 25/216
300
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
300
This type of bias is typically present when subjects do not get a chance to answer the survey question.
What is undercoverage?
300
Where does my oldest daughter go to elementary school?
Patwin
400
If you repeatedly took samples of the same size and constructed an interval of a certain length from the sample statistic, 95% of those intervals will contain the population statistic.
What does it mean to be 95% confident?
400
The probability of pulling a red or a Queen from a standard deck of 52 cards.
What is P(red or queen) = P(red) + P(queen) - P(red and queen) = 28/52 = 0.538
400
The length of human pregnancies from conception to birth approximates a normal distribution with a mean of 266 days and a standard deviation of 16 days. What length of time marks the shortest 70% of all pregnancies?
274.39 days
400
The "memory game" we played in class had the following for
Experimental Units:
Treatments:
Response Variable:
Experimental Units: Students
Treatments: Good Directions and Bad Directions
Response Variable: Number of Questions correct on a Memory Quiz
400
How many students on our class roster have a first name starting with A?
4th period: How many students on our class roster have a first name starting with R?
2nd: Addie, Afreen, Alana, Alice, Andy (5)
3rd: Addison, Adria, Alfridah, Amaiah, Andres, Atticus (6)
4th: Remonda, Rene, Reyhan, Ruben, Ryan (5)
5th: Abbie, Abi, Amy, Angelica, Ari (5)
6th: Alfred, Allison, Allison, Atticus (4)
500
Type II error goes down, power goes up, and Type I error stays the same when this statistic decreases.
What is standard deviation?
500
At a small company, 40 percent of the employees are classified as junior level, and 32 percent of the employees work in department A. Of those classified as junior level, 55 percent work in department A. One employee will be selected at random.
What is the probability that the selected employee works in department A and is not classified as junior level?
0.10
500
Scores on the GMAT are roughly normally distributed with a mean of 527 and a standard deviation of 112. According to the model, what percent of sample means of size 10 people scored above 500 on the GMAT?
77.7 percent
500
Some students at your school claim that taking an SAT prep course will help improve their SAT score. You design a study where you get volunteers and randomly assign half to take the prep course while the other half do not. After taking the SAT you find the results statistically significantly higher for the prep course. You say: For _______ , taking an SAT prep course ________ higher SAT scores.
For PEOPLE SIMILAR TO THE VOLUNTEERS, taking an SAT prep course CAUSES higher SAT scores.
500
What state did Mr. Wright visit during winter break?
Michigan