Me, Myself and I 2

Question 1

what is a sample

Answer 1

a small subset of the total population

Question 2

what is a population

Answer 2

all members of a defined group

Question 3

define sampling error

Answer 3

the random variation introduced into a data set as a function of only sampling a subset of the population

Question 4

what must be tested within statistical testing so it can be used

Answer 4

the reliability and significance of findings

Question 5

what is a hypothesis in statistics

Answer 5

a statement or assumption about the characteristics of a population or the relationship between variables that is subject to statistical testing

Question 6

describe the null hypothesis

Answer 6

the default expectation if there is no experimental/biological effect

Question 7

describe the alternative hypothesis

Answer 7

the expectation that categorical outcomes are not all equally likely and there is a relationship between two measured phenomena

Question 8

what assumptions are made during a chi squared test

Answer 8

-variable are categorical
-observations are independent
-observations are mutually exclusive
-most of the expected values are greater than 5

Question 9

when can a chi squared test be used

Answer 9

when the observations are assigned into mutually exclusive classes

Question 10

what is the chi squared formula

Answer 10

𝜲2 = ∑(d2/e)