Julia Brown

The international Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day, with a standard deviation of...

It has been reported that 80% of taxpayers who are audited by the IRS end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor the percentage of cases that...

According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same:10 years. Assume that their finding was basedon a sample of n1=60 dishwashers and n2 = 40 garbage disposals, and...

A study has been carried out to compare the United Way contributions made by clerical workers from three corporations. A sample of clerical workers has been randomly selected from each firm, and the dollar amounts of their contributions are as follows. Fi...

The outstanding balances for 500 credit card customers are listed below. Using the 0.10 level of significance, examine whether the data could have come from a normal distribution. Balance 3917 3968 3176 3318 4282 3666 2585 3831 3684 4213 3857 3142 2876 39...

The following data represnt x = boat sales and y = boat trailer sales from 1995-2000. Year 1995 1996 1997 1998 1999 2000 Boat Sales 649 619 596 576 585 574 Boat Trailer Sales 207 194 181 174 168 159 a. Determine the least squares regression line and inter...

For the data below with y = touchdown percentage and x= interceiption percentage, determine and interpret the coefficients of correlation and determination. Rating TD% Inter% S. Young 96.8 5.6 2.6 K. Warner 95.7 5.5 3.5 D. Culpepper 93.2 5.4 3.1 P. Mannin...

For each of 10 popular prescription drugs, below lists the retail price for the drug in several different countris, including the US, Canada, Great Britain, and Austrailia. Determine and interpret the coefficients of correlation and determination for US p...

Computer database GROWCO describes the characterisitics of 100 companies identified by Fortune as the fastest growing. Two of the variables listed are revenue and net income (millions of dollars) for the most recent four quarters. Determine the linear reg...

Look at answer (b). Step 1. Multiply 3t by t Step 2. Multiply 3t by 6 Step 3. Multiply 1 by t Step 4. Multiply 1 by 6 That gives you 3t^2+18t+t+6 Step 5. End Result 3t^2 + 19t + 6