Choosing the right statistic

For the following research scenarios, identify the appropriate statistical analyses.

Choose from the following statistical analyses used in the scenarios. (Options can be used more than once, but all will be used at least once.)

Descriptive Stats

ANOVA

ANOVA One way Repeated-Measures

Chi-square test for Independence

Chi-Square test for goodness of fit

Correlation

Multiple Regression

Single sample t-statistic

Independent t-statistic

Repeated Measures t-statistic

Research Scenarios

1.Researchers would like to report the number of cases of salmonella among children enrolled in Northern KY schools. The researchers collect data for the 2005/2006 school year.

2.Average IQ scores for young school children are known to be 100 (SD = 15).However, data indicate that children's intelligence may be affected if their mothers have German measles during pregnancy.Using hospital records, a researcher obtained a sample of n = 30 school children whose mothers all had German measles during their pregnancies.The average IQ score for this sample was 96.2.Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children?

4.A researcher would like to know if regular exercise benefits female breast cancer survivors by improving quality of life.The researcher randomly selects a sample of 40 female breast cancer survivors (not involved in a regular exercise routine) who are then randomly assigned to one of two conditions (or groups):Following pre-tests on a quality of life index, the Experimental group (exp) took part in a structured strength training program for a period of six months while the Control group (contr) did not take part in the program.After the six-month training period, the researcher again measured quality of life in all 40 participants.

5.You're interested in knowing if a walking plus strength training exercise program results in a significantly greater increase in maxVo₂ as compared to a walking only or a strength training only exercise program.Participants are randomly selected and then randomly assigned to one of three groups walking plus strength training, walking only, or strength training only.After 6-months of exercise the participants are assessed.

6.A researcher suspects that there is a relationship between substance use and

sexual activity among single college students.

8.Ann wonders if the proportions of t-shirt sizes sold are consistent with the

proportion of t-shirt sizes ordered.