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
