MediumHypothesis testing

OpenStax, Statistics §10.3 Comparing Two Independent Population Proportions · Exercise 22 · Statistics · Hypothesis testing

Comparing Two Independent Population Proportions · Exercise 22

Neuroinvasive West Nile virus is a severe disease that affects a person’s nervous system. It is spread by the Culex species of mosquito. In the United States in 2010, there were 629 reported cases of neuroinvasive West Nile virus out of a total of 1,021 reported cases, and there were 486 neuroinvasive reported cases out of a total of 712 cases reported in 2011. Is the 2011 proportion of neuroinvasive West Nile virus cases more than the 2010 proportion of neuroinvasive West Nile virus cases? Using a 1 percent level of significance, conduct an appropriate hypothesis test.
• 2011 subscript: 2011 group.
• 2010 subscript: 2010 group

An appropriate null hypothesis is

(a) p_2011 ≤ p_2010
(b) p_2011 ≥ p_2010
(c) μ_2011 ≤ μ_2010
(d) p_2011 > p_2010

~8 minWritten answer · compare with the solution

OpenStax, Statistics · §10.3 Comparing Two Independent Population Proportions · Exercise 22

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.