Definitions
Calculations
Theory
Find the Mistake
Applications
100
What is the name of this distribution?
The Normal distribution
100
What is the median of the following list of numbers?
{3, 1, 5, 7, 10}
The median is the middle number, 5
100
In statistics, do we typically know the population average, u?
No
100
A U.S government news announcement reports that the average household income in 2026 was $104,000, signaling a strong economy.
Household income in the U.S is a very skewed right distribution.
Averages do not work well with skewed distributions.
The announcement should have used the median household income.
100
What is a single number that can describe how well a linear regression line fits the data?
Correlation (r) or R-Squared (R^2)
200
What is the shape of this distribution?
Right skewed
(The tail is pointing to the right)
200
The average height of all FSU students is 5.5 feet and the standard deviation is 0.5 feet.
Calculate the z score of a person whose 6 feet tall.
Z = (X-Average)/Standard Deviation
Z = (6 - 5.5) / 0.5 = 1
200
John and Sarah each create a confidence interval for the average professor rating on RateMyProfessor.
John uses a random sample of 100 professors.
Sarah uses a random sample of 200 professors.
Who do you expect to have a THINNER confidence interval?
Sarah
A larger sample size decreases the width of the confidence interval.
200
To estimate the average amount of time FSU students spend on campus, a student walks around Strozier and asks 100 students:
"How many hours do you typically spend on campus each day"
The sample was not a simple random sample.
You are excluding students who were not in Strozier at that time.
200
What type of test should we use if we want to determine if attending a public or private university affects whether a graduate finds a job or not.
Public/Private and Job/No Job are both categorical variables.
So we should use a chi squared test.
300
What is the probability of obtaining a test statistic more extreme than the one generated, assuming the null hypothesis is true?
The p value
300
The regression line for the number of beds in a house vs. the price of the house is:
Price = $150,000 + $30,000 X Beds
Predict the price of a house with 3 beds.
Price = $150,000 + $30,000 X (3) = $240,000
300
The weight of all babies born in a hospital follows a normal distribution with mean 7lbs and standard deviation 1lbs.
What is the probability that a newborn baby weighs exactly 7.2lbs?
0%
The probability of weighing exactly 7.20000000... pounds is 0.
300
A student randomly samples 100 professors on RateMyProfessor.com. They calculate a 95% confidence interval for the average rating of all professors on the website.
"There's a 95% probability that the average rating of all professors is between 3.5 and 3.9"
"There's a 95% probability that the average rating of all professors is between 3.5 and 3.9"
300
What type of test should we use if we want to see if UF, FSU, UCF, and USF have the same or different graduate average starting salaries?
An ANOVA test
400
What is the name of the r values seen below?
The correlation coefficient
400
Calculate the sample standard deviation of the following numbers: [2, 4, 1]
From 1-Var Stats:
Sx = 1.53
400
Fill in the central limit theorem:
x̄ ~ N(?,σ/sqrt(n))
x̄ ~ N(μ,σ/sqrt(n))
where μ is the population average
400
Use this regression line
(L)
(I)
(N) Normally distributed Residuals
(E) Equal Variance of Residuals
400
What type of test should we do if we want to determine if the age of a hospital patients is correlated with the number of days they spent in the hospital?
Both variables are continuous, so we would do a regression ANOVA test.
500
What is the interpretation of the y-intercept in the following regression line?
We expect that a student who does not sleep before the exam would get a 56%.
500
The age of all students at FSU follows a normal distribution with mean 20 years and standard deviation 1 year.
What is the probability that a randomly selected student is younger than 19 years old?
P(0 < X < 19)
NormalCDF(0,19,20,1)
= 16%
500
What would be the null hypothesis of the following ANOVA test?
H0: u1=u2=u3
or
H0: The three population means are the same
500
The predicted happiness score of a person with a salary of $100,000 would be 7.3.
This prediction is extrapolation because we do not have any samples of people with a salary larger than $80,000
500
What type of test should we use if we want to determine if a new blood pressure drug reduces the blood pressure of patients?
A T-Test