Assessing and Presenting Experimental Data Viscosity (Dimensionless) Sample No. 12345or∞a 9 2 43 4 75 50 48 73 55 48 50 6 8 9 Using Apparatus A 10 72 54 Using Apparatus B 73 45 56 75 53 50 72 54 48 52 Determine whether there is a significant difference in the two systems at the 99% confi- dence level.

Integrate: z+2dx +C

The mayor is interested in finding a 95% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 140 residents whose mean number of pounds of trash generated per person per week was 35.8 pounds and the standard deviation was 8.4 pounds. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ?v distribution. b. With 95% confidence the population mean number of pounds per person per week is between and pounds. c. If many groups of 140 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of pounds of trash generated per person percent will not contain the true population mean number of per week and about pounds of trash generated per person per week.

2. Diagonalize -1 2 2 2 2 -3 -6 -6

Convert 5x-3y=-9 into standard form (y=mx+b)