A researcher records the sound (in decibels) during a series of lessons taught by a substitute teacher at a local elementary school. In his study, he found that the sound was 80 ± 6 (M ± SD) decibels. Assuming the data are normally distributed, which of the following is an appropriate conclusion?
A. At least 68% of classes were between 76 and 84 decibels.
B. At least 5% of classes were louder than 68 decibels.
C. At least 95% of classes were between 68 and 92 decibels.
D. All of these.
Ans: C
You might also like to view...
Frank films his class's creative movement activities several times over the school year, edits them together, and then displays the video on his school's website. The purpose of this display is to:
a. promote the school. b. display the elements of dance. c. show his integrated curriculum. d. show artistic growth.
Stephanie has been studying for two exams scheduled on the same day, one for her Spanish class and the other for French. While taking the Spanish exam, she remembers more French than Spanish. Stephanie is most likely to be experiencing ____
a. decay b. interference c. reconstruction d. biasing
Advantages of mnemonic devices stressed in the text include all but which of the following?
a. They help organize what is to be learned. b. They facilitate maintenance rehearsal. c. They provide retrieval cues. d. They can be acquired by virtually all students.
Answer the following statement(s) true (T) or false (F)
The No Child Left Behind Act of 2001 required that all school children participate in state and district testing.