Zika and male reproduction. The Zika virus, which is known to be transmitted by mosquitoes, can also be transmitted sexually, as the virus can persist for weeks in the semen of symptom-free infected men. Using a mouse model, researchers examined the impact of Zika on male reproductive organs. Young adult male lab mice of a breed susceptible to Zika were either inoculated with Zika or not. Here are the weights of their testes two weeks later (in grams, g) Uninfected 85 85 90 91 96 100 Infected 17 93 15 12 10 9 10 12 a) What two populations do the researchers want to compare and what is the response variable? b) State the null and alternative hypotheses. Plot the data and check the conditions for inference. Explain why a two-sample t test is not appropriate here.
Zika and male reproduction. The Zika virus, which is known to be transmitted by mosquitoes, can also be transmitted sexually, as the virus can persist for weeks in the semen of symptom-free infected men. Using a mouse model, researchers examined the impact of Zika on male reproductive organs. Young adult male lab mice of a breed susceptible to Zika were either inoculated with Zika or not.
Here are the weights of their testes two weeks later (in grams, g)
Uninfected 85 85 90 91 96 100
Infected 17 93 15 12 10 9 10 12
a) What two populations do the researchers want to compare and what is the response variable?
b) State the null and alternative hypotheses. Plot the data and check the conditions for inference. Explain why a two-sample t test is not appropriate here.
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