Four pesticides used in dormant California orchards are chlorpyrifos, diazinon, methidathion, and parathion. Environmental Science & Technology

Question:

Four pesticides used in dormant California orchards are chlorpyrifos, diazinon, methidathion, and parathion. Environmental Science & Technology (Oct. 1993) reported the number of applications of these spray chemicals over a 6-month period in California. The data for each of three types of fruit or nut orchards are shown in the accompanying table. (Parathion has since been banned for use on deciduous fruit and nut trees.)

a. Conduct a test to determine (at α = .01) whether pesticide used depends on type of orchard. 

b. Because of the large number of pesticide applications reported, the total sample size for the test, part a, is extremely large (n = 417,679). Consequently, a ”statistically significant” result may not be “practically significant.” Perform an analysis to show the magnitude of differences in the rates of methidathion application for the three orchard types.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Statistics For Engineering And The Sciences

ISBN: 9781498728850

6th Edition

Authors: William M. Mendenhall, Terry L. Sincich

Question Posted: