document.write( "Question 1201540: 1.The following salaries (in pesos) were obtained from a sample of 12 executive secretaries:\r \n" );
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document.write( "7,500 13,000 10,300 10,600 7,600 8,350 \n" );
document.write( "8,400 5,800 6,300 9,200 7,500 9,470\r \n" );
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document.write( "(a)Find estimates for the mean and variance of the salaries of all executive secretaries. \n" );
document.write( "(b) What is the proportion of executive secretaries with salaries above P9,000. \n" );
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