you have a chemical reaction between 700 grams of compound a & 300 grams of compound b which produces compound c. you measure the resultant amount of c in grams over 8 trials which are listed below. what range do you estimate for the amount of compound c that will be produced by any single performance of this reaction? you should give a range that you are 95% confident in.

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b