Chapter 11

Question 1

one-way table

Answer 1

used to show the distribution of a categorical variable for a sample of individuals

Question 2

chi-square goodness-of-fit test

Answer 2

tests the null hypothesis that a categorical variable has a specified distribution

Question 3

observed count

Answer 3

the actual count of outcomes in an experiment or study

Question 4

one-way expected count

Answer 4

predicted count; found by multiplying the specified proportion of the population distribution in the same category by the sample size

Question 5

ch-square statistic

Answer 5

measures the difference of the observed and expected counts
(observed-expected)^2/
x^2=___=expected

Question 6

chi-square distribution

Answer 6

multiple distributions that take only positive values and are skewed to the right

Question 7

Large Sample Size condition

Answer 7

takes place of the Normal condition, approximation of the sampling distribution of the statistic x^2

Question 8

components

Answer 8

show which terms contribute most to the chi-square statistic

Question 9

two-way expected count

Answer 9

any cell of a 2 way table when the null hypothesis is true:

expected count= row total(column total)/
table total

Question 10

chi-square test for homogeneity

Answer 10

used to compare proportions of successes for each of several populations or treatments

Question 11

chi-square test of association/independence

Answer 11

tests that the null hypothesis does not have an association between the two categorical variables in the population of interest