Question

Prompt: Suarez et al (1998) collected data on flatus (farts) and odor intensity (how stinky the farts were) in a small sample of men and women. The researchers have no specific hypothesis, but they want to examine whether male and female flatus differ by odor intensity.

They have collected the following:

• Sex: The sex of the participant – 1 = Male; 2 = Female
• Odor Intensity Score: On a scale from 0 (no odor) to 8 (very offensive), they asked participants to rate their preference

Their paper has provided the descriptive statistics we need to compute the analysis.

	n	Mean	SD
Male (1)	10	2.8	.3
Female (2)	6	4.2	.6

Using all the information provided by Suarez et al., (1998), analyze the data using a two-tailed test with a critical value of p<.05 and then give them a report on your findings. Answer the following questions in complete sentences.

1. State the null and research hypotheses (please put in sentences and also in statistical notation)
2. Set the level of risk associated with the null hypothesis. Set it to p<.05, two-tailed.
3. Select the appropriate test statistic – based on the data collected and our research questions, what test statistic will we perform? Why is this an appropriate test statistic?
4. Compute the test statistic value.
5. Determine the critical value.
6. Compare the obtained value to the critical value.
7. Make a decision. What do you conclude? In addition to your decision, please present your results in the following notation: t(df) = t-statistic, p > or < .05

Answer 1