AP Statistics 2017

CHAPTER 14 Inference for Categorical Data: Chi-square IN THIS CHAPTER Summary: In this final chapter, we wil ...

categorical variable measured across two or more populations (called a chi-square test for homogeneity of prop ...

read from a table of X 2 critical values or determined from a calculator. There is a X 2 tab ...

H (^) A : at least one of these proportions is incorrect. II . We will use the χ^2 goodness-of-fit test. T ...

example: The statistics teacher, Mr. Hinders, used his calculator to simulate rolling a die 96 times and st ...

X 2 = 4.75 (calculator result), df = 6 – 1 = 5 P -value > 0.25 (Table C) or P -value = ...

Chi-Square Test for Independence A random sample of 400 residents of a large western city are polled to dete ...

solution: There are two ways to approach finding an expected value, but they are numerically equivalent and you ...

that we have the conditions present to do a χ^2 -test, but this is the way we’ll find our expected ...

Do these data provide evidence, at the 0.02 level of significance, that the crime rate is associated ...

Because “Male” and “Female” are now considered separate populations, we do not ask if gender and political part ...

II . We will use a chi-square test for homogeneity of proportions. The samples of tenured and nontenured ...

a. the study was a goodness-of-fit test with n = 12? b. the study was a test of independence ...

b. H (^) A : p 1 = p 2 = p 3 = p 4 . c. H (^) A : Not all of the proportions stated ...

H (^) A : Teaching level and job satisfaction are not associated. d. H 0 : The proportion of each ...

populations are compared in terms of a single variable. d. For a given value of X 2 , they ha ...

using this function (randBin(4,0.3,500) → L1 ) and counting the number of each outcome. (Can you think ...

Compute the expected frequency for the cell that contains the frog. You are given the marginal dist ...

Do these data support, at the 0.05 level, the contention that the type of respondent (student, faculty, ...

a. The fish whose width is 3.8 had a length of 25.5. What is the residual for this point? b. ...