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1.- An investigator has obtained the height of 18 5-year-old children from two contrasting socioeconomic conditions...

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?

Math   Statistics-And-Probability   
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