Refer to the Journal of Biogeography (December 2003) study of ants in Mongolia (central Asia), presented in Exercise. Data on the number of ant species attracted to 11 randomly selected desert sites are saved in the GOBIANTS file. Do these data indicate that the standard deviation of the number of ant species at all Mongolian desert sites exceeds 15 species? Conduct the appropriate test at α = .05. Are the conditions required for a valid test satisfied? weight was 2,971 grams and the standard deviation was 410 grams. Test (at α = .01) to determine whether the variance in birth weights of babies delivered by cocaine-dependent women is less than 200,000 grams 2.

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