Chi Squared
Population mean
What is "μ"
Sample mean
What is "x̄"
Population standard deviation
What is "σ"
Population variance
What is "σ²"
Sample variance
What is "Sn²"
What is the chi squared test of independence used for?
What is to see if two variables are independent or if there is a relationship
True or false: Z tests are used to compare means
What is False. T tests are used to compare means.
Trick question: what is the name of bia's dog
What is micky
What do you need in a conf int z test?
What is population standard deviation
The t* value changes depending on this number from your sample.
What are the degrees of freedom (df)?
What is the chi squared goodness of fit test used for?
What is to see if outcomes are in proportion to the expected, or if there is bias
Flipping a coin 100 times. Results: 55 heads and 45 tails. I want to find out if this was by chance of if there was bias in testing. I use z test to do so. True or false.
What is false. I use chi squared goodness of fit.
I want to find out if the temperature outside has an effect on the amount of ice cream sold at an ice cream shop. I use T test for this. True or false?
What is false. I use chi squared test of independence.
The z* value for a 95% confidence level is this number.
What is 1.96?
A sample of 40 students has an average height of 165 cm. σ = 8 cm. You use t test, true or false.
What is false.
This type of chi-squared test is used to check if two categorical variables are independent.
What is the chi-squared test of independence?
Trick question: what is a monte carlo situation?
What is a simulation of experimental results that approx real results
This test is used instead of the z-test when the population standard deviation is unknown, especially for small samples.
What is the one-sample t-test?
A 95% CI means we are 95% confident the true mean lies in this.
What is the interval?
A sample of 12 students has an average score of 78 and s = 5. You use t test, true or false?
What is true.
What is daisy
If the p-value is 0.032 and α = 0.05, this decision is made regarding the null hypothesis.
What is reject H₀?
What is the T test used for?
What is to see if there is a difference in the mean average of two populations.
A larger sample size makes the confidence interval do this.
What is get narrower?
If your 95% CI is [72, 80] and H₀: μ = 75, what’s your decision?
What is fail to reject H₀?