Question

1. In the following studies, state whether you would use a one sample t test, an independent sample t test or a paired sample t test.
   1. A study examining whether there were differences in exercise preference between men and women.
   2. A blind taste test to determine preference of Pepsi vs Coca Cola.
   3. A study to determine if a class of middle school aged children had higher than normal BMI’s (normal = 25)
   4. A study to determine if IV Tylenol was more effective than IV Morphine in the first 24 hours post hysterectomy.

Researchers were interested in determining whether there was a difference in crime rates in areas where there is high youth unemployment vs low youth unemployment. Alpha (level of significance) was set at .05.

2. State the null and alternate hypotheses.
3. What is the independent variable?
4. What is the dependent variable?
5. Complete the table below:

	Low Youth Unemployment	High Youth Unemployment
Sample Size
Sample Mean
Sample Standard Deviation
Estimated Standard Error

Group Statistics
	High Youth Unemployment	N	Mean	Std. Deviation
Crime rate (number of offences per million population)	0 No	32	108.4063	27.32246
	1 Yes	15	90.8667	29.42049

Group Statistics
	High Youth Unemployment	Std. Error Mean
Crime rate (number of offences per million population)	0 No	4.82997
	1 Yes	7.59634

Answer 1