For a study of free-living populations of the fruit fly
For a study of free-living populations of the fruit fly Drosophila subobscura, researchers placed baited traps in two woodland sites and one open-ground area. The numbers of male and female flies trapped in a single day are given in the table.31
(a) Use a chi-square test to compare the sex ratios at the three sites. Let ∝= 0.05
(b) Construct a table that displays the data in a more readable format, such as the one in Exercise 10.5.1.
Exercise 10.5.1:
Patients with painful knee osteoarthritis were randomly assigned in a clinical trial to one of five treatments: glucosamine, chondroitin, both, placebo, or Celebrex, the standard therapy. One outcome recorded was whether or not each patient experienced substantial improvement in pain or in ability to function. The data are given in the following table.30
(a) Use a chi-square test to compare the success rates at. (The value of the chi-square statistic is
(b) Verify the value of given in part (a).
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Posted 26 Apr 2017 09:04 AM
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