Multiple Choice (2 points each) Total points is 50.
Which of the following was listed as a requirement for a fairly complete understanding of a distribution?
d. All of the other alternatives
For a negatively skewed curve, the usual case with continuous data is that
a. high scores are more frequent than low scores and the mean is greater than the median;
b. low scores are more frequent than high scores and the mean is greater than the median;
c. high scores are more frequent than low scores and the median is greater than the mean;
d. low scores are more frequent than high scores and the median is greater than the mean.
“For our study of driving habits, we recorded the speed of every fifth vehicle on Drury Lane. Nearly
every car traveled right at the speed limit or a little over, but there were some that were 10 mph
under, even fewer at 20 mph under, and one car that crept by at just 15 mph. On the basis of the
central tendency calculation on our data, we drew conclusions about all drivers on this stretch of
road.” The proper central tendency value calculated from the data is the
a. population median;
b. sample median;
c. population mean ();
d. sample mean (
Which of the following statements is false, according to your text?
a. The salaries of people in sales are more variable than those in management.
b. For a distribution of scores,
is smaller than S.
c. Males are more variable than females in reaching puberty.
d. none of the other alternatives are correct.
The advantage of using z scores over using raw scores is that z scores allow you to
a. compare a score in one distribution to a score in another;
b. understand the relationship of a score to the mean;
c. both of the descriptive alternatives;
d. neither of the descriptive alternatives.
The standard deviation of the IQ’s of students at a high school for the gifted and talented is the
standard deviation of the IQ’s of students at a high school, that accepts everyone in its district.
a. less than;
b. greater than;
c. equal to.
If the standard deviation of a distribution is less than one, the variance will be ________ than the
c. could be either larger or smaller;
d. the same size.
Solve the following Problems (12 points Each)
For each study below name the dependent variable, independent variable, and its levels.
a. Thirty females were divided into three equal groups. One group was taught how to
concentrate on their breathing. A second group was told to imagine that the day was very
hot and that they would be allowed to place their hand in cool water. The third group was
told nothing. All three groups placed their right hand in buckets of ice water for one minute.
Afterward, they rated their pain on a scale of one to seven.
b. During Rapid Eye Movement (REM) sleep, muscle tone is lost. For a rat sleeping on a 22-
inch diameter platform over water, REM sleep is interrupted by falling into the water. With
this technique you can deprive rats of REM sleep. Two groups of rats were deprived of
REM sleep for zero or 72 hours. Afterward they learned to choose one arm of a T maze for
food reinforcement. Each rat was given 30 trials in the T maze and its percentage of correct
responses was calculated.
c. Four groups of males were monitored during their sleep one night for the number of minutes
of Rapid Eye Movement (REM). During the seven hours before sleep one group had seen six
hours of TV, one had seen four hours, one had seen two hours, and one group had seen no
Describe what each of the following graphs is used for.
a. line graph
b. frequency polygon
d. bar graph
Five “natural” athletes were asked to participate in a study of motor skills. As part of the study they
learned to balance on a freestanding ladder (a skill that requires you to make quick, precise
adjustments) and to perform the two-hand coordination task (an eye-hand coordination task). The
scores are shown below.
Calculate a correlation coefficient and write a conclusion about motor skills in excellent
athletes. Construct a scatterplot.
Initials Ladder Coordination
TH 8 1.7
IS 11 1.0
IS 3 1.2
TR 7 1.5
UE 9 0.6
The post Choose the answer to the following questions: appeared first on Essays Nest.
Writing quality papers is a TOP priority. One expert takes one order at a time.
The service package includes topic brainstorm, research, drafting, proofreading, plagiarism check, citation formatting, and revisions.
We appreciate how valuable your time is. Hence, we make sure all custom papers are 100% original and delivered within the agreed time frameRead more
Each paper is written from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
We see it as our duty to follow all instruction the client provides. If you feel the completed paper does not meet your exact requirements, we will revise the paper if you let us know about the problem within 14 business days from the date of delivery.Read more
Your email is safe, we use your personal data for legal purposes only and in accordance with personal data protection law. Your payment details are also secure, as we use only reliable payment systems.Read more
You can easily contact us with any question or issues you need to be addressed. Also, you have the opportunity to communicate directly with assigned writer, e-mail us, submit revision requests, chat with us online, or call our toll-free on our site. We are always available to our customers.Read more