Multiple Choice
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.
Correct Answer:
Verified
Correct Answer:
Verified
Q43: A researcher selects a sample of 24
Q44: The population standard deviation is equal to
Q45: Which of the following distributions has the
Q46: The standard deviation is typically reported in
Q47: For a set of data that is
Q49: All other things being equal,the value in
Q50: For nonnormal distributions,at least 99.7% of data
Q51: Which of the following is an example
Q52: The advantage of squaring the deviation of
Q53: All other things being equal (so assuming