Normal Probability Distribution
Falling into the top 10% of data would place you in this percentile
What is the 90th percentile?
These values determine the rejection zone
What is a critical value?
Given a sample size below 30 the T-Distribution curve is ______ & ______ then the normal distribution curve
What is flatter and wider?
When N (sample size) increases the width of the confidence interval ______
What is decreases?
The error associated with incorrectly rejecting a true null hypothesis
What is a type 1 error?
Use this equation to find how many are expected within a given probability
What is the probability * n (sample size)?
This formal is used in excel to compute Z CV
What is NORM.S.INV?
This distribution is known as a family of curves
What is the T-Distribution?
When dealing with minimum sample size N must always be ________ to the nearest whole number
What is rounded up?
This type of error is associated with failing to reject a false null hypothesis
What is a type 2 error?
Normal distributions are systematical around the ____
What is the mean?
This happens to the critical values when the level of confidence is increased
What is increase? or Move further along the curve
This excel formula computes T-critical values
What is T.INV?
Use this type of score to estimate the population mean when the standard deviation is given
What is Z score?
The risk of a type 1 error is also known as a(n) ______
What is an Alpha risk?
The shape of a normal distribution
What is a bell curve?
Excel removes the need for these two charts which display critical values
What is Z and T chart?
To find T critical values the level of confidence and the _______ are needed
What are the degrees of freedom?
In a normal distribution the sample size is a minimum of __ unless otherwise specified. (hint: excel takes away this rule because of it's instant T-value calculation)
What is 30?
Beta risk
What is the risk of creating a type 2 error?
Another name for the 68-95-99.7 theory
What is the empirical rule?
These are the three different types of tests run when using CV
What is left tail, right tail, and two tailed?
Used to calculate the T-Statistic
What is the standard error?
n=((z*sigma)/E)^?
The minimum sample size formula is raised to the power of ___
What is two?
At a level of confidence of 83% the alpha risk is _%
What is 17%?