University:
Carleton College
Course:
MATH 111 | lntroduction to Calculus
Academic year:

2024
Views:

53

Pages:

2
Author:

Alecai8y

Question 1 What is a contingency table? Answer A contingency table is a table of counts from data that reflects the relationship between two or more given variables. The common name is called cross tabulation. It is found in one axis e.g. treatment method on horizontal axis is contingent on the variable found on other axis e.g. stop smoking on vertical axis. It is also called two-way table, because the given table is presenting two variables: treatment and smoking, corresponding to columns and rows respectively. Question 2 Create a two-way table that shows the joint and marginal relative frequencies using the table below. Male Female Total Expert Average Novice 62 6 68 275 24 299 40 3 43 Total 377 33 410 Answer The provided data is used to obtain the relative frequencies and represent as a two-way relative frequency table. MALE FEMALE TOTAL EXPERT 0.151 0.015 0.166 AVERAGE 0.671 0.059 0.73 NOVICE 0.098 0.006 0.104 TOTAL 0.02 0.08 1 Question 3 Fill in right answer. "In a two-way table, we compare two variables." Answer "categorical" is the right answer. Thus, we have: "In a two-way table, we compare two categorical variables." Question 4 Find the TRUE answer about a two-way table, please: a) Marginal distributions are usually not presented as percentages. b) There are two sets of conditional distributions in every two-way table. c) Conditional distribution compare cell counts to the table total. d) Marginal distribution describe relationship between two variables Answer Answer B is correct. There are two sets of conditional distributions in every two-way table. Question 5 What is the second name for a two-way frequency table of categorical data? a. a two-way by two-way table b. a multiple-treatment table c. an equal probability table d. a contingency table Answer Another name for two-way frequency table for categorical data is a contingency table. Thus, (d) is correct.