Question

1.- An investigator has obtained the height of 18 5-year-old children from two contrasting socioeconomic conditions (high and low). It considers that both population groups have different heights. Are the sizes of 5-year-old children in the two samples, of contrasting socioeconomic conditions, significantly different? Use a significance level of 5%.

SOCIOECONOMIC CONDITION	1	2	3	4	5	6	7	8	9
LOW	98	100	104	102	99	102	103	97	99
HIGH	104	103	105	107	99	107	103	104	106

a) What is the critical value of the statistic in the rejection zone?
b) What is the value of the test statistic?
c) What is your conclusion?

Answer 1