Chapter 1, Problem 11PT

To determine

To find:The Wrong statement about the results of this experiment.

Answer to Problem 11PT

(d) High and low concentrations of either chemical have approximately the same effects on weed growth.

Explanation of Solution

Given: An experiment was conducted to investigate the effect of a new weed killer to prevent weed growth in onion crops. Two chemicals were used: the standard weed killer (C) and the new chemical (W). Both chemicals were tested at high and low concentrations on a total of 50 test plots. The percent of weeds that grew in each plot was recorded. Here am some boxplots of the results.

  

(a) At both high and low concentrations, the new chemical (W) gives better weed control than the standard weed killer (C).

(b) Fewer weeds grew at higher concentrations of both chemicals.

(c) The results for the standard weed killer are less variable than those for the new chemical.

(d) High and low concentrations of either chemical have approximately the same effects on weed growth.

(e) Some of the results for the low concentration of weed killer W show fewer weeds growing than some of the results for the high concentration of W.

Formula Used:

Calculation:

High and low concentrations of either chemical have approximately the same effects on weed growth.

Conclusion:Therefore option(d) is the correct option.