Problem Set 3.6:Confidence Intervals

Criterion:Calculate confidence intervals using SPSS.

Data:Usethe SPSS output from Problem Set 3.5 above.

Instructions: Based on the SPSS output from Problem Set 3.5, including a test value (population mean) of 8, calculate the 95% confidence interval.

Problem Set 3.5:One-Sample ttest in SPSS

Criterion:Calculate a one-sample t test in SPSS.

Data:Riverbend City online news advertises that it is read longer than the national news. The mean for national news is 8 hours per week. The following sample of the Riverbend City online news readers is: 5, 7, 6, 2, 4, 8, 5, 4, 18, 21, 8, 7, 4, 5, 6.

One-Sample Statistics
	N	Mean	Std. Deviation	Std. Error Mean
Time	15	7.3333	5.23268	1.35107

One-Sample Test
	Test Value = 8
t	df	Sig. (2-tailed)	Mean Difference	95% Confidence Interval of the Difference
Lower	Upper
Time	-.493	14	.629	-.66667	-3.5644	2.2311