Question 1

Paired Samples Statistics&#10;   Paired Samples Test&#10;  &#10;Which is the correct answer?&#10;A)There is no significant difference in the participants as a result of the intervention&#10;B)There is a significant difference in the participants as a result of the intervention; symptoms have improved&#10;C)There is a significant difference in the participants as a result of the intervention; symptoms have become worse&#10;D)We cannot tell

Accepted Answer

The statement indicates that there is a significant difference in the participants due to the intervention, specifically noting an improvement in symptoms.

Question 2

Which of the following is a two-group independent design?&#10;A)People with Migraine are measured on stress levels and frequency of migraine attacks&#10;B)A group of patients with Inflammatory Bowel Disease are tested both at baseline and after an intervention to improve their symptoms.&#10;C)People with Irritable Bowel Syndrome are compared with people with Inflammatory Bowel Disease on Cortisol levels.&#10;D)People with lower back pain are treated by weekly sessions of acupuncture for twelve weeks to determine if their back pain reduces

Accepted Answer

C) represents a two-group independent design because it involves comparing two separate groups (people with Irritable Bowel Syndrome vs. people with Inflammatory Bowel Disease) on a specific measure (Cortisol levels), without any crossover between the groups.

Question 3

Which is the most appropriate answer? The Wilcoxon test is used for&#10;A)an independent design where scores are normally distributed&#10;B)a repeated-measures design where scores are normally distributed&#10;C)an independent design where scores are skewed&#10;D)a repeated measures design where scores are skewed

Accepted Answer

The Wilcoxon test is a non-parametric test used for repeated measures designs where the data does not follow a normal distribution, i.e., the data is skewed.

Question 4

Which is the correct statement?&#10;A)The healthy group had a lower level of life satisfaction, Z= 2.70, p=.003&#10;B)The healthy group had a higher level of life satisfaction, Z=2.70, p=.003&#10;C)The healthy group had a lower level of life satisfaction, Z=2.70, p=.005&#10;D)The healthy group had a higher level of satisfaction, Z=2.70, =.003

Accepted Answer

The answer of Which is the correct statement?&#10;A)The healthy group...

Question 5

If we say that the t-test is 'robust in respect of violations of the assumptions' we mean&#10;A)that the violation of assumptions does not make much difference to the results&#10;B)that the t-test is tough and strong&#10;C)that the violation of assumptions means that the assumptions are strong ones&#10;D)all of the above

Accepted Answer

The t-test is considered robust in respect of violations of the assumptions because it can still produce reliable results even when the assumptions (such as normality of the data) are not strictly met. This means that minor violations do not significantly affect the outcome of the test.

Question 6

A researcher carries out a t-test to analyse the differences between two conditions.She wishes to use a one-tailed hypothesis.The output from SPSS gives a two-tailed probability of .10.Which value should she use to report the one-tailed associated probability?

A).010
B).50
C).05
D).10

Accepted Answer

For a one-tailed test, the p-value is half of the two-tailed p-value given the direction of the effect aligns with the hypothesis. Therefore, .10 divided by 2 equals .05.

Question 7

Which of the following shows whether scores from two independent groups have roughly equal variances?&#10;A)A t-test&#10;B)Levene's test&#10;C)The Mann-Whitney Test&#10;D)The Wilcoxon Test

Accepted Answer

Levene's test is specifically designed to assess the equality of variances between two or more groups, making it the correct choice for determining if scores from two independent groups have roughly equal variances.

Deck 6: Differences Between Two Groups