After every score in a sample is multiplied by 3, the mean is calculated and found to be M = 21 . What was the mean for the original scores?
a. 7
b. 21
c. 63
d. Cannot be determined from the information given
A
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A normal distribution has a mean of ยต = 60 with ? = 8 . If one score is randomly selected from this distribution, what is the probability that the score will be greater than X = 54?
a. 0.7734 c. 0.2734 b. 0.2266 d. 0.3085
Which statement is TRUE regarding women and/or ethnic minorities in the field of psychology?
a. ?Women did not make any significant contributions to the field of psychology until the last 50 years. b. ?Ethnic minorities did not make any significant contributions to the field of psychology until the last 50 years. c. ?Although ethnic minorities made significant contributions in psychology from the very beginning, women did not make any contributions until the last 50 years. d. ?Both women and ethnic minorities made significant contributions to the field of psychology from the early years of its history.
Which of the following is true of any one-sample experiment?
a. We must know the population mean under the same condition of the independent variable as the one being tested. b. We must know the population mean under some condition of the independent variable other than the one being tested. c. We must know the sample mean under the condition of the independent variable being tested, but we do not need to know the population mean. d. We must know the sample mean under the condition of the independent variable being tested and under some other condition of the independent variable.
In the course of developing their asexuality measure, Brotto and Yule were able to identify about ________% of self-identified asexual individuals.
A. 93 B. 97 C. 88 D. 94