Which of the following statements regarding grouped frequency distributions is not true?
a. all class intervals must be the same width
b. class intervals should not overlap
c. there should be no more than seven class intervals
d. each score may fall in only one class interval
e. all of these are true
Question 2
If American research participants were asked to identify the emotion in a facial photograph and rate its intensity, the results might be hard to interpret because
a. there is little agreement on what behaviors are associated with different emotions.
b. Americans of different cultural backgrounds show similar responses to some emotions but different responses to others.
c. people often label the emotion depicted in a photograph very differently and with little consistency.
d. people from different parts of the country label emotions in consistently different ways.