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Science-Related Homework Help Statistics and Probability Topic started by: Derar on Mar 3, 2018



Title: In the sign test applications, the normal approximation to the binomial distribution works very well ...
Post by: Derar on Mar 3, 2018
In the sign test applications, the normal approximation to the binomial distribution works very well even when the number of nonzero differences is as small as:
 a. 5
  b. 10
  c. 15
  d. 25
  e. 30

Q. 2

In a normal approximation to the sign test, the standardized test statistic is calculated as z = -1.58 . To test the alternative hypothesis that the location of population 1 is to left of the location of population 2, the p-value of the test is:
 a. 0.1142
  b. 0.2215
  c. 0.0571
  d. 0.2284

Q. 3

A nonparametric method to compare two populations, when the samples are matched pairs and the data are ordinal, is the:
 a. Wilcoxon signed rank sum test
  b. sign test
  c. Wilcoxon rank sum test
  d. matched pairs t-test
  e. chi-square test

Q. 4

Which one of the following is a disadvantage of the sign test?
 a. Tied pairs are not considered in the analysis.
  b. Only the signs of the differences and not the actual values are used in the analysis.
  c. Its inability to cope with small samples.
  d. Results from such tests have little practical use.
  e. None of these.

Q. 5

Which one of the following is not a reason why one might use a sign test to make a comparison between two populations?
 a. Some studies yield responses which are difficult to quantify.
  b. It is easy to use the sign-testing procedure.
  c. The data in question consist of count data.
  d. No assumptions need to be made about the form of the population probability distributions.
  e. Some studies yield responses which are difficult to quantify and the data in question consist of count data.

Q. 6

The sign test is a nonparametric procedure for testing:
 a. whether two populations have identical means
  b. whether two populations have identical medians
  c. whether two populations have identical probability distributions
  d. the amount of skewness in a single population
  e. none of these

Q. 7

The sign test is a nonparametric test that 1) uses the directions of differences observed in a matched pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another and 2) determines whether a sample comes from a population with a specified median.
  Indicate whether the statement is true or false


Title: In the sign test applications, the normal approximation to the binomial distribution works very well ...
Post by: amandagrace on Mar 3, 2018
Content hidden


Title: In the sign test applications, the normal approximation to the binomial distribution works very well ...
Post by: Derar on Mar 3, 2018
:D that's the expression my face made when I got the notification email


Title: In the sign test applications, the normal approximation to the binomial distribution works very well ...
Post by: amandagrace on Mar 3, 2018
glad I put that smile on your face :-]