A one-tailed test of statistical significance is appropriate when:
A. the data show a skewed frequency polygon.
B. no research hypothesis is stated.
C. the research hypothesis is a directional research hypothesis.
D. a nondirectional research hypothesis is stated.
Answer: C
You might also like to view...
What does tenure, in education, represent?
a. an ongoing contract to teach b. a contractual agreement that a teacher cannot be dismissed c. seniority d. that the U.S. Department of Education has certified the teacher as eligible for an ongoing contract to teach
The following four junior high school science teachers are teaching the concept atom to their students. From Piaget's perspective, some of the students in each classroom are in the formal operations stage and others are at the concrete operations stage. In which classroom are the concrete operational students most likely to have difficulty understanding what an atom is like?
A) Mr. Armani lets students touch and manipulate concrete models of various atoms. B) Mr. Bendetti lets students look at the same concrete models that Mr. Armani has used. C) Mr. Carmen verbally describes how different elements are made up of different numbers of neutrons, protons, and electrons. D) Mr. Davidson has students role-play being neutrons, protons, and electrons. The "neutron" and "proton" students huddle together in the middle of the room, and the "electrons" move around them.
The Yopp-Singer Phoneme Segmentation Test appears to be a valid and reliable test of phonemic awareness
Indicate whether the statement is true or false
The use of critical-case sampling and negative-case sampling would be an example of mixed purposeful sampling.
a. True b. False