Basics
What is R?
A powerful mathematical tool and programming language with many applications not limited to statistics, data visualization, analysis, machine learning etc.
What is correlation?
The strength and direction of two quantitative columns of data
For a hypothesis test, Is this a one sided test or a two sided test if we want to test the mean waiting time for a restaurant line will be more than 5 minutes?
one sided
What is the function in R for running a linear model?
lm(y_data ~ x_data)
What does the confidence interval show?
This estimates a range that tries to find the true population unknown parameter let's say of a mean or proportion
Which function did we use to find the p value in R today?
pnorm()
What is the formula for the standard deviation in a sampling distribution?
standard deviation/square root of n
What is the 95% critical z score?
1.96
The bigger the p value the stronger the evidence against the null hypothesis provided by the data. True or False
False