4
(p. 427, q. 723)
A Type II error...
a. is also called a beta error
b. means you reject the null when applicable
c. means you accept the null when it is false
d. a and c
d. a and c
(p. 432, q. 733)
If data indicates that student who study a lot get very high scores on a stat counselor licensing exam, then the correlation between study time and LPC exam scores would be...
a. positive
b. negative
c. 0
d. impossible to ascertain
a. positive
(p. 439, q. 743)
A bimodal distribution has two modes (i.e., most frequently occurring scores). Graphically, this looks roughly like...
a. a symmetrical bell-shaped curve
b. a camel's back with two humps
c. the top half of a bowling ball
d. a mountain which is leaning toward the left
b. a camel's back with two humps
(p. 428, q. 725)
A counselor educator decides to increase the sample size in her experiment. This will...
a. confound the experiment in nearly every case
b. raise the probability of Type I and Type II errors
c. have virtually no impact on Type I and Type II errors
d. reduce Type I and Type II errors
d. reduce Type I and Type II errors
(p. 433, q. 734)
Which of the following would most likely yield a perfect correlation of 1.00?
a. IQ and salary
b. ICD diagnosis and salary
c. length in inches and length in centimeters
d. height and weight
c. length in inches and length in centimeters
(p. 439, q. 744)
In a basic curve, or so-called frequency polygon, the point of maximum concentration is the...
a. mean
b. median
c. mode
d. range
c. mode
(p. 428, q. 726)
If a researcher changes the significance level from .05 to .001, then...
a. alpha and beta errors will increase
b. alpha errors increase, beta errors decrease
c. alpha errors decrease, beta errors increase
d. this will have no impact on Type I or Type II errors
c. alpha errors decrease, beta errors increase
(p. 433, q. 735)
A good guess would be that if you would correlate the length of CACREP graduates' baby toes with their CPCE scores, the results would be...
a. close to 0
b. close to a perfect +1
c. close to a perfect -1
d. be about +.70
a. close to 0
(p. 440, q. 745)
The most useful measure of central tendency is the...
a. mean, often abbreviated by an X with a bar over it
b. median, often abbreviated by Md. or Mdn.
c. mode, often abbreviated by Mo
d. Point of maximum concentration
a. mean, often abbreviated by an X with a bar over it
(p. 430, q. 730)
To complete a t-test you would consult a tabled value of t. In order to see if significant differences exist in an ANOVA, you would consult...
a. the mode
b. a table for t-values
c. a table for f-values
d. the chi-square
c. a table for f-values
(p. 434, q. 737)
Behaviorists often utilize N=1, which is called intensive experimental design. The first step in this approach would be to...
a. consult a random number table
b. decide on a nonparametric statistical test
c. take a baseline measure
d. compute the range
c. take a baseline measure
(p. 441, q. 747)
From a mathematical standpoint, the mean is merely the sum of scores, divided by the number of score. The mean is misleading when...
a. the distribution is skewed
b. the distribution has no extreme scores
c. there are extreme scores
d. a and c
d. a and c
(p. 431, q. 731)
Which level of significance would best rule out chance factors?
a. .05
b. .01
c. .02
d. .001
d. .001
(p. 437, q. 740)
Experimental is to cause and effect as correlational is to...
a. blind study
b. double-blind study
c. N=1 design
d. degree of relationship
d. degree of relationship
(p. 441, q. 748)
When a distribution of scores is not distributed normally, statisticians call it...
a. Gauss' curve
b. a symmetrical bell-shaped curve
c. a skewed distribution
d. an invalid distribution
c. a skewed distribution