Gwen wants to know whether the people in her neighborhood are in favor of installing bike lanes along the neighborhood roads. at a community meeting, she asks those attending whether they are in favor of the bike lanes or not. is the sample likely to be biased or unbiased?

a. biased

b. unbiased

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?