Stats Inf Midterm 2

The test statistic for goodness of fit has a chi-square distribution with k - 1 degrees of freedom provided that the expected frequencies for all categories are

5 or more

the test for goodness of fit and test of independence are designed for use with

categorical data

An experimental design that permits simultaneous statistical conclusions about two or more factors is a

factorial design

A statistical test conducted to determine whether to reject or not reject a hypothesized probability distribution for a population is known as a

goodness of fit

Generally the _____ sample procedure for inferences about two population means provides better precision than the _____ sample approach

matched, independent

The sampling distribution of p̄1 - p̄2 is approximated by a

normal distribution

The number of degrees of freedom associated with the chi-square distribution in a test of independence is

number of rows minus 1 times number of columns minus 1.

If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, the alternative hypothesis should state

p1 - p2 > 0

In the ANOVA, treatments refer to

the different levels of a factor

Check My Work (8 remaining) In the analysis of variance procedure (ANOVA), "factor" refers to

the independent variable

the ANOVA procedure is a statistical approach for determining whether or not the means of

three or more populations are different

In a factorial experiment, if there are x levels of factor A and y levels of factor B, there is a total of

xy treatment combinations