Question

At the end of chapter 9, SPSS output gives the results of a study looking at the mean birth weight in full-term and premature infants in Figure 9-14. Does the t-test show a significant difference in mean birth weight between full-term and premature infants? State the conclusion for this study in plain English.

Answer 1

					t- test	for	Equality	Of means
Levennes test for equality	Of variances								95% confidence interval	Of the difference
		F	significance	t	df	Significance (two tailed	Mean difference	Standard Error difference	lower	upper
Birth weight	Equal Variance assumed	0.767	0.407	8.465	8	0.000	2228.33333	253.23640	1621.30910	2835.35756
	Equal Variance not assumed				7.484	0.000	2228.33333	251.93804	1640.30927	2816.35740

p-value fo significance =0.000

hence

t-test show a significant difference in mean birth weight between full-term and premature infants

there is sufficient evidence that there is difference in birth weight between full-term and premature infants

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