Vocab
Data collected at the same, or approximately the same, point in time.
Cross-sectional data
Approximately 20% of Rockhurst's 2,500 students live in residence halls. In order to understand residence hall satisfaction, staff conducts a survey of 100 students. What is the size of the population for the survey?
500
3 x 2
6
The name of the toy cowboy in Toy Story.
Woody
What is the name of the Rockhurst mascot?
Rock E. Hawk
A z-score of -1.25 can be interpreted as what?
Value 1.25 standard deviations below the mean.
The sum of all relative frequencies for all classes will always equal what?
1
Calculate the mode:
1
2
1
4
1
Where is the smallest human bone?
In the ear (stapes)
The alma mater of Professor Dale
Purdue University (would also accept Rockhurst University)
The tentative assumption about a population parameter.
Null hypothesis
The expected value of a random variable is what?
The measure of the central location of a random variable.
A quiz has 2 questions: 1 true/false and 1 multiple choice with 5 possible choices (a,b,c,d,e). If you have to completely guess on both questions, what is the probability that you answer both incorrectly?
0.4
The Taylor Swift era typically associated with the color purple.
Speak Now
The year Rockhurst University was founded.
1910
The percent of variability explained by a linear regression model.
R2
What is the goal of the least squares method?
Find the estimated regression equation by minimizing error terms between predicted and actual.
In a game, there is a 5% chance of winning $100, a 50% chance of winning $0, and a 45% chance of losing $20. What is the expected value?
= 0.05*$100 + 0.5*$0 + 0.45*(-$20) = -$4
What is the name of the scale used to measure the spiciness of peppers?
Scoville scale
What was the name of the tiny kitten brought into class?
Juicebox
A probability distribution showing the probability of x successes in n trials, where the trials have only two possible outcomes: success and failure.
Binomial probability distribution
When would you use CUMULATIVE = TRUE in Excel? In other words, what is this describing?
If the probability should be cumulative, ie everything above/below a point, or if you're looking at a single point of a distribution.
Write the null and alternative hypothesis for a linear regression model.
H0: b1 = 0
Ha: b1 != 0
Who is the current speaker of the House?
Mike Johnson
Professor Dale drinks coffee nearly every day. What is her preferred drink?
McDonalds: Caramel macchiato
Starbucks: White mocha (bonus if you remember the vanilla cold foam!)