Reference no: EM13108188
Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it. NOTE: Would you use Spearman rank-order correlation coefficient, Mann-Whitney U test, Wilcoxon T test, Kruskal-Wallis H test, or Friedman X2 test.
a. One group of mommies has played classical music for their babies every day for 6 months while another group of mommies has not. The babies were tested at the end of six months, to test for statistical significance, on whether their babies had developed motor coordination skills or not.
b. College freshmen with test anxiety are assigned to three groups. One group receives free individualized counseling, one group participates in a class to teach them how to reduce their anxiety, and the third group receives no treatment. They are tested to determine if there is a significant difference in the anxiety level (high, medium, and low).
c. A survey of local residents has been conducted to determine the level of support for a new shopping plaza. Those surveyed were allowed to respond in one of five categories - strongly support, support, no opinion, do not support, strongly do not support. The residents were surveyed as they entered the new shopping plaza and then the same survey was sent out again to them two weeks later.
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Purpose of wilcoxon signed-rank test
: What is the purpose of a Wilcoxon signed-rank test? Explain. The Wilcoxon signed-rank test resembles which parametric test(s)? Explain.
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Case study - mega beverage corporation
: Mega Beverage Corporation will launch its new twelve-hour energy drink called the Viva in a few weeks. The company suggests a retail price of $3 for a 3-ounce bottle; however, the retail buyers must agree not to sell the drink for less than $2.75.
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Compute probability of number of students with loan
: Student record revealed that 16 out of a random sample of 64 of student with loans. It supposed that current rate is persisting across all students. Compute probability that number of students with loans will be less than 375.
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Wilcoxon-whitney test
: What is a Wilcoxon-Whitney Test and when is it used? I am not sure when to use the Wilcoxon-Whitney Test and what it is testing.
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Determining non parametric tests
: Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it.
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Perform test of company-s claim at alpha
: ample of fifteen 8 ounce Baby Ruth candy bars are weighed and it is found sample standard deviation is 0.6 ounces. Test company's claim at (alpha sign) is 0.05.
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Mann-whitney u test
: Dan Thompson, the president of CEO Airlines, recently noted an increase in the number of no-shows for flights out of Atlanta.
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Find whether demand and unit price are related using t test
: Carry out t test and find out whether or not demand and unit price are related. Let a=.05. Carry out an F test and find out whether or not demand and unit price are related.
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Alternatives to a chi squared test.
: Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution?
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