1. With an acknowledgment to Sesame Street, \"Which of these things is not like
ID: 3340052 • Letter: 1
Question
1. With an acknowledgment to Sesame Street, "Which of these things is not like the others, which of these things doesn't belong?"
a .repeated measures;
b. natural pairs;
c. independent samples;
d. matched pairs.
2.There is no difference in the two populations" is a statement of
a. the null hypothesis;
b, a one-tailed alternative hypothesis;
c. a two-tailed alternative hypothesis;
3. A student conducted a before and after study on college statistics students to see if the course improved ability to reason. In a later study, she used a mother-daughter sample to assess generational differences in attitudes toward abortion. Her two designs are
a. paired, paired;
b. paired, independent;
c. independent, independent;
d. independent, paired.
4. For a two-sample t test, an effect size that qualifies as large is
a, 0.05;
b. 0.20;
c. 0.80;
d. all of the descriptive alternatives are correct;
e. none of the descriptive alternatives are correct.
5.Thirteen volunteers weighted themselves before and after a two day fast is what specific type of a design?
a. Matched
b. Repeated measures
c. Natural
d. Independent sampling
6. Gerbils were used to assess the effect of Natural Neutral, a drug designed to reduce emotionality in high-drive people. Each of 20 gerbils spent 10 solitary minutes in an open field. The investigator recorded the number of fecal boluses for each animal. Then each animal was given an injection of Natural Neutral and the open field task was repeated.
The design of this study is
a, paired samples;
b. independent samples;
c. testing the significance of a correlation;
d. none of the other alternatives are correct.
7. This experiment is modeled after part of the data needed to demonstrate the Hawthorne Effect. Four assembly-line workers, who normally had two coffee breaks and an hour for lunch, participated in a week-long experiment in which they gave up both coffee breaks and half their lunch hour.
The experiment described in this question is
a. is an independent samples design;
b. is a paired samples design;
c. isn't given in enough detail to determine the design.
8, In that long standing feud between the Hatfields and the McCoys, Old Doc Sawbones has been keeping score. During the last 16 years he noted in his feudian notebook a "degree of injury" measure each time he patched up, sewed up, or made a coroner's report on anyone in the two families. :
The design of the study described above is
a. independent samples;
b. paired samples;
c. comparing a sample mean to a population mean;
d. not enough information is given.
9.
Identify each experiment below as an independent samples design or a paired samples design.
1. At a hunting club the squirrel hunters had a contest with the quail hunters to see who could hit the most moving targets.
2. A consumer-testing group compared Oxyclean and Tide to determine which got stuff whiter. Sheets that had been placed for 12 hours in a bathtub of mud were washed and the amount of light reflected was measured with a photometer.
3. Fifth-grade American Indians were matched as a group to a group of New York Puerto Ricans on SES, IQ, and reading level. They were then given a questionnaire on attitudes toward school.
4. On the basis of a pretest on knowledge of foreign governments, each student in the 9:00 class was matched with a student in the 10:30 class. The 9:00 class used a "participant approach" to the study of politics and the 10:30 class used the "Heidleburg method." At the end of the term the same test was given to both classes.
Explanation / Answer
2.) The answer is A that is null hypothesis because null hypothesis is a statistical hypothesis, which is under test, is usually a hypothesis of no difference .
3) the correct answer is option A that is paired, paired because in both cases we are studying the observations on a pair.
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