1. is rice bran pellet food effective on the growth and development of the hamster? Null Hypotheses: Alternative hypotheses: 2. Is rice bran pellet rat food effective as a substitute for inorganic and expensive rat food? Null hypotheses: Alternative hypotheses:
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Hypothesis tests are proposed. For each hypothesis test. a. identify the variable. b. identify the two populations. c. determine the null and alternative hypotheses. d. classify the hypothesis test as two tailed, left tailed, or right tailed. Wing Length. D. Cristol et al. published results of their studies of two subspecies of dark-eyed juncos in the paper "Migratory Dark-Eyed Juncos, Junco hyemalis, Have Better Spatial Memory and Denser Hippocampal Neurons Than Nonmigratory Conspecifics" (Animal Behaviour, Vol. 66, Issue 2, pp. 317-328). One of the subspecies migrates each year, and the other does not migrate. A hypothesis test is to be performed to decide whether the mean wing lengths for the two subspecies (migratory and nonmigratory) are different.