module 3

Question 1

what is a population

Answer 1

a group of individuals of which a sample came from

typically this is a group of which we are making an estimate about given the data in our sample

Question 2

what is a sample statistic

Answer 2

a single number that best represents/ estimates the parameters of a population of which a sample came from

Question 3

what makes a good sample

Answer 3

it is unbiased and precises

Question 4

What is bias

Answer 4

the values of a sample are centered around values other than the true population parameter

note that an unbias sample will ensure that all members of a population of an equal chance to be included

Question 5

what is precision

Answer 5

The act of obtaining a repeatable estimate

note that increases sample size will increase precision, but will don’t impact the bias of the sample

inprecision is a form of sampling error

Question 6

what is a nonindependent sample?

Answer 6

this means that the selection of one remember in a sample influences the selection of the next member

this will commonly cause the illusion that a sample size is smaller than it actually is (it generates a false sense of precision)

Question 7

what is the sampling distribution

Answer 7

the distribution of a sample stat if many samples were to be taken