You wonder whether Baruch students vary in height by major. You collect a simple

Question

You wonder whether Baruch students vary in height by major. You collect a simple random sample of 205 Marketing Majors and 200 Economics Majors. The average height for the sample of Marketing Majors is 68"- the average for the sample of Economics Majors is 66." The standard deviation for the sample of Market Majors is 5" the standard deviation for the sample of Economics Majors is 6." You test the null hypothesis that the average height of Marketing Majors is not statistically significantly dfferent than that of Economics Majors. Do not assume the two groups have the same variance. Calculate the standard error: SE (YM - YE OA. 3.64 O B. 0.0003 OC. 2.00 O D. 0.55

Explanation / Answer

from above data :s1 =5 ; s2 =6  

n1 =205 and n2=200

std error =(s12/n1+s22/n2)1/2 =(52/205 +62/200)1/2 =0.55

option D is correct

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