Author: admin

A pharmaceutical company has employed researchers to
investigate the frequency of heart attacks among those who have taken their
drug regularly and those who have not. Would the manufacturer urge the
researchers to be especially careful to avoid making a Type I error or a Type
II error?

Intelligence tests can most accurately be
described as
a. Measures of innate mental capacity
b. Academic achievement measures
c. Reading tests
d. Scholastic aptitude tests

1. List and briefl y describe the instruments available for
recording data in observational research.
2. What type of instrument would be most appropriate to
measure each of the following?
a. To determine if high school chemistry students can use
laboratory scales to weigh specifi ed amounts of a given chemical compound
b. How students in the various elementary schools in Brown
County compare in math skills
c. How parents feel about an extended school day for
elementary schools in the district
d. The general verbal and nonverbal abilities of a child
with dyslexia
e. To study bullying in an elementary classroom
f. To get a major professor’s evaluation of the potential of
a student for advanced work in chemistry
g. To get a quick measure of students’ attitudes toward the
extracurricular programs available at the school

1. Explain how a mathematics achievement test could be
judged to have high validity in one mathematics class and low validity in
another mathematics class.
2. Criticize the following statement: The reliability of the
intelligence test is .90. Therefore, you can assume that the test scores can be
interpreted as measuring intelligence

1. Determine the standard error of measurement for a test
with a standard deviation of 16 and a reliability coeffi cient of rxx= .84. How
would you interpret this standard error of measurement?
2. Check the test manual for the achievement test being used
in your school. What type of reliability data are reported there?