Review of Unit 7 lesson 2 Vocab

Statistics A

15 cards·by NW3422

density curve

Graph of a ongoing probability distribution

standard normal distribution

is a normal distribution with a mean of zero and a standard deviation of one

nonstandard normal distributions

is a normal distribution with a mean of zero and a standard deviation of one

sampling distribution of the variance

the distribution of sample variances, with all samples having the same sample size n taken from the same population

unbiased estimator

is a statistic used to estimate a parameter is an unbiased estimator if the mean of its sampling distribution is equal to the true value of

uniform distribution

the frequency of each value of the variable is evenly spread out across the values of the variable

z score

is a measurement of how many standard deviations you are away from the average or mean

estimator

is a statistic used to estimate the parameter

sampling distribution of the proportion

describes the pattern that sample proportions tend to follow when randomly drawn from a population

central limit theorem

the distribution of sample averages was to be normal rather of the shape of the process distribution

normal distribution

is a function that represents the distribution of variables as a curved bell-shaped graph.

critical value

The separated point between the region where the null hypothesis is rejected and the region where it is not rejected.

sampling distribution of a statistic

the distribution of all values of the statistic when all possible samples of the same size n are taken from the same population

sampling distribution of the mean

the distribution of sample means over repeated sampling from one population

standard error of the mean

the standard deviation of a sampling distribution