A ______ is a depiction of the number, or proportion of scores in a sample, or population having each value of a variable.
a. raw frequency count
b. frequency table
c. relative frequency
d. descriptive frequency
Ans: B
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Eight-year-old Hawthorne has several accurate, well-developed scripts, including one for a visit to the doctor's office. Which is the most likely example of her doctor's office script?
a. Enter clinic, tell mom she feels better, sit in waiting room, see doctor, get shot (inoculation) in arm, cry b. Realizing that doctors earn money so that they can buy things c. Envisioning herself performing brain surgery on a patient d. Remembering that her favorite television show, ER, is also about doctors
A double pretest design is particularly attractive when ____
a. the researcher is evaluating a program that has already begun b. the unit of study is a community rather than an individual c. it is important that those who most need the treatment receive it d. there are concerns about selection-maturation effects
Which of the following statements about Francis Galton is incorrect?
a. He was an early member of the psychometric approach to intelligence. b. He attempted to measure intelligence through tests such as the memory span. c. Like Charles Darwin, he was deeply committed to the idea of survival of the fittest. d. His tests were later shown to be poor predictors of actual intellectual performance.
About what percentage of the adults in the world are dominantly right-handed?
a. 50% c. 75 to 80% b. 65 to 70% d. 85 to 90%