Central Limit Theorem
True or False:
If a population is normally distributed then the sampling distribution of the sample mean will be normally distributed, regardless of the sample size.
What is True?
A z-interval is used to estimate this.
What is a population mean?
A measure of central tendency that is not affected by outliers.
What is the median?
A type of sample where every sample of size n has the same chance of being chosen.
What is a simple random sample?
Another word for mutually exclusive?
What is disjoint?
The standard deviation of X bar is the population standard deviation divided by the square root of __________?
What is the sample size?
The margin of error is half of this quantity.
What is the length ( or the width )?
The square of the standard deviation.
What is the variance?
A sampling method where the population is divided into levels and a simple random sample from each is selected.
What is a stratified random sample?
The formula for the Addition Rule for Mutually exclusive events.
What is P( A or B ) = P ( A ) + P ( B )?
For a given sample size, the mean of the sampling distribution of the sample means is always equal to this?
What is the population mean?
When finding z*, we begin by drawing this particular normal curve.
What is the standard normal curve?
Three measures of spread that are affected by outliers.
What is the standard deviation, or variance, or range?
Neither the subject nor the experimenter knows what treatment is being given.
What is double-blind?
A and B are independent events if P( A/B ) = ________
What is P ( A ) ?
The standard deviation of the sampling distribution of the sample mean becomes _______________as the sample size increases.
What is smaller?
Lowering a confidence level, while keeping all other quantities equal, will have this effect on the confidence interval?
What is shortening?
This measures the direction and strength of the linear relationship between two quantitative variables.
What is the correlation?
Determining whether subjects would prefer Coke or Pepsi would require this type of experimental design?
What is a matched pairs design?
Before calculating a binomial probability, these four conditions must be satisfied?
What are (1) fixed number of trials (2) Success and failure on each trial (3) probability of success remains the same on every trial (4) independent trials?
The name of the calculator function that can be used to find probabilities associated with normal distributions.
What is normalcdf?
The value of z* is determine by this number, which is specified in the problem.
What is the confidence level?
This measures the percent of variation in y that is explained by the linear relationship between x and y.
What is the coefficient of determination?
In this type of experimental design, subjects are divided into groups according to some shared characteristic and a separate experiment is performed on each group.
What is a block design?
The probability of Ms. Trenholm saying " I'm glad you all have senioritis".
What is 0?