Values of the possible confounding variable

Assignment Help Basic Statistics

Reference no: EM131816814

A survey was taken of students at a large university in the fall of 2003 who were enrolled in one of three introductory statistics courses: Stat 200, commonly taken by students in the social sciences; Stat 1000, taken by students in the natural sciences; and Stat 1100, taken by business majors. Among other things, students were asked if they had pierced ears.

a. Use software to access the student survey data. Report the percentage with pierced ears for students in the social scienceoriented course, students in the natural science-oriented course, and students in the business-oriented course.

b. The percentage with pierced ears is substantially higher among social science students, and substantially lower among business students. What is a possible confounding variable that is the real reason for a relationship between course taken and having pierced ears or not?

c. To determine the true nature of the relationship between course taken and having ears pierced or not, what would be the next step to take: Construct separate tables for each of the values of the possible confounding variable, or take larger samples in all groups?

Reference no: EM131816814

Questions Cloud

Use software to access the student survey data : Use software to access the student survey data. Report the percentage of females in Stat 200, Stat 1000, and Stat 1100.

What is the conceptual approach to the quantitative analysis : Conceptual Approach A large automobile-parts plant was constructed 4 years ago in a Pennsylvania city served by two railroads. The PC Railroad purchased 40.

Report the percentage preferring each color : Use software to access the student survey data. Report the percentage preferring each color for males and for females.

Identify whether each of the procedures is primarily a test : Identify whether each of the procedures is primarily a test of control or a substantive test of transactions

Values of the possible confounding variable : Construct separate tables for each of the values of the possible confounding variable, or take larger samples in all groups?

Prepare a cost comparison of all relevant items : Book Value of Old Equipment Consider the following data concerning the replacement of old equipment by new equipment.

What is the role of a pos system in forecasting at hard rock : Describe three different forecasting applications at Hard Rock. What is the role of a POS system in forecasting at Hard Rock?

Construct a two-way table of counts : If there is enough information provided, construct a two-way table of counts.

Sample of individuals from around the country : Take a sample of individuals from around the country; record the hardness (parts per million of calcium carbonate) of water where they live

User Account

All Pages