Reference no: EM132009151

a) A researcher wishes to determine whether the salaries of professional nurses employed by private hospitals are higher than those of nurses employed by governmentowned hospitals. She selects a sample of nurses from each type of hospital and calculates the means and standard deviations of their salaries. At the .01 level of significance, test the claim that private hospitals pay more than government owned hospitals. Assume both populations normal and the variances are equal.

Private Gov 't

x1 = $26,800 x2 = $25,400

s 1 = $600 s2 = $450

n1 = 10 n2 = 8

claim .................................................... ________________________

null hypothesis........................................ ________________________

alternative hypothesis................................ ________________________

Calculator Screen Name........................... ________________________

test statistic .............................. ________________________

pvalue/alpha comparison............................ ________________________

decision ............................... ________________________

Conclusion ............................... ________________________

b) Construct a 99% confidence interval for µ1 - µ2 based on the sample data above. Interpret the interval in a complete sentence.

Confidence Interval Name__________________________________

Interval___________________________________________

Interpret_____________________________________________