Exam 17: Testing for Differences Between Two Samples

For the following set of data produced in an independent samples experiment experimental group: 23, 34, 45, 34, 37, 38, 25, 42 control group: 11, 35, 19, 42, 27, 18, 27, 15, 21, 19 -6) The difference tested after "The degrees of freedom involved with the t value just found ", using a two-tailed analysis:

10) Non-normal data can be transformed to normal by:

8) The power of a significance test is:

1) Children in two English classes have been matched. One class has undergone an experimental teaching method designed to improve spelling. Both groups undergo a spelling test at the end of the experimental programme. The data meet parametric requirements so the most suitable difference test is:

3) A set of data produce a two-tailed unrelated t of 2.043 in an experiment where there were 14 participants in one group and 17 in the other. The difference tested is:

2) A researcher wishes to test the difference between two samples of data where each sample has been produced by a different group of participants. The data are found to be highly skewed and this skew cannot be removed by transformation. The researcher could:

For the following set of data produced in an independent samples experiment experimental group: 23, 34, 45, 34, 37, 38, 25, 42 control group: 11, 35, 19, 42, 27, 18, 27, 15, 21, 19 -5) The degrees of freedom involved with the t value just found are:

7) Lack of homogeneity of variance is most problematic when:

For the following set of data produced in an independent samples experiment experimental group: 23, 34, 45, 34, 37, 38, 25, 42 control group: 11, 35, 19, 42, 27, 18, 27, 15, 21, 19 -4) the t value is:

9) Which of the following will not increase power: