A researcher obtains chemistry achievement test scores from a group of high school students who have had laboratory experience and a group who have not. She recognizes the need to control for the variable intelligence in his study. Identify the type of control technique illustrated by the following procedures. The effect of intelligence on the test scores is controlled with a statistical
procedure.
a. match
b. use analysis of covariance
c. use a homogeneous group
d. add intelligence as an additional independent variable
B
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In colonial times, families were
a. ?patriarchal and extended. b. ?matriarchal and extended. c. ?patriarchal and geographically separated. d. ?egalitarian.
To create a picture of a student's early literacy development, a teacher would NOT
a. collect, date, and store samples of student work in a literacy portfolio b. periodically use writing development checklists to document progress c. periodically use reading development checklists to document progress d. periodically fill out a mathematics literacy skills development checklist
An instructional plan is useful to the teacher before, during, and after the instruction
Indicate whether the statement is true or false.
The sum of the deviations from the mean will always be equal to _______.
a. zero b. one c. n ? 1 d. n + 1