Chapter PIII, Problem 26RE

(a)

To determine

To explain: the probable benefits and drawbacks of each one on the basis of the suggestion given.

Explanation of Solution

Since the data for the lab standard detergent from previous experiments are already available, all 16 swatches with Sparklekleen were used for this experiment and the result was correlated with previous data.

Water quality and water temperature are the variables involved. The consistency of the water is correlated with the temperature of the water, which influences the outcomes. The treatments in the experiments must be in conditions which, with the exception of the studied element, are similar.

(b)

To determine

To explain: the probable benefits and drawbacks of each one on the basis of the suggestion given.

Explanation of Solution

Use both detergents with 8 separate runs each, but with really hot water to save time, use just a 10 second wash.

The state of both 8-separate detergents works each but only a 10-second wash with very hot water and save time use is impractical because the washing time saved only 10 seconds, which is not successful than the usual procedure. This will not assist experimenters in evaluating how well Sparklekleen will perform under the conditions it was intended for.

(c)

To determine

To explain: the probable benefits and drawbacks of each one on the basis of the suggestion given.

Explanation of Solution

First run all the regular detergent washes on &9ht swatches, then run at 'all Sparklekleen washes on the other eight swatches, to ease bookkeeping.

If the swatches are stained at the very same time, it would have more time to set the stains on the swatches later washed to create bias against sparklekleen. Variable is also unpredicted. Randomization won't equalise those variations in water temperature or pressure.

(d)

To determine

To explain: the probable benefits and drawbacks of each one on the basis of the suggestion given.

Explanation of Solution

Use details from the company that developed Sparklekleen instead of conducting experiments and compare them with previous knowledge from the regular detergent.

It is unclear the conditions under which the Sparklekleen was tested. There is no way for the situations to be held comparable. In addition, the company which generated Sparklekleen may not generate reliable data. They have a vested interest in their brand's success.