statistics

statistics

A researcher is interested in estimating the difference in average salaries for fresh MBA graduates and fresh BAS graduates who are newly hired. The samples results are:

MBA    BAS
n1  =  10 persons     n2   = 10 persons
$1800
$1450  S1  =  $80      S2  =  $50

a)    Check the assumption of common variance.

b)    Find the pooled estimate of the common variance.

c)    Calculate the 90% confidence interval for the difference in average salaries for fresh MBA graduates and fresh BAS graduates.

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