a candidate for mayor wants to know how strong her support is among voters, so she posts an online survey on her campaign website for voters to take.
is this sample of voters likely to be biased or unbiased? a. biased b. unbiased to determine whether voters would be willing to vote for a tax increase to improve the city's schools, the board of education surveys 500 parents of children in the city's schools.
why is this sample likely to be biased? a. the entire population of the city was not surveyed. b. parents of school children are too busy to be bothered with surveys. c. there are not enough people in the sample. d. parents of school children are more likely to be willing to pay more to improve schools.in a bin containing 500 marbles, 180 are red, 240 are blue, and 80 are green. in a bowl of 25 marbles scooped from this bin, how many would be expected to be green? a. 4 b. 8 c. 9 d. 12 a battery manufacturer randomly tests 500 batteries and finds that 3 are defective.
how many defective batteries would be expected in a shipment of 12,000 batteries? a. 120 b. 72 c. 60 d. 36 a large bin of mixed nuts contains peanuts, cashews, almonds, and walnuts. sheila scoops out a bowl full of nuts and counts how many of each type she has: 17 peanuts, 9 cashews, 12 almonds, and 10 walnuts.
armando scoops out a bowl of 32 nuts. about how many should he expect to be cashews? a. 5 b. 6 c. 9 d. 18

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

What is the difference between the equations of a vertical and a horizontal line?

In january 2010, you began a one-year study of tuberculosis (tb) in a subsidized housing community in the lower east side of new york city. you enrolled 500 residents in your study and checked on their tb status on a monthly basis. at the start of your study on january 1st, you screened all 500 residents. upon screening, you found that 30 of the healthy residents had been vaccinated for tb and therefore were not at risk. another 20 residents already had existing cases of tb on january 1st. on february 1st, 5 residents developed tb. on april 1st, 10 more residents developed tb. on june 1st, 10 healthy residents moved away from new york city and were lost to follow-up. on july 1st, 10 of the residents who had existing tb on january 1st died from their disease. the study ended on december 31, 2010. assume that once a person gets tb, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up. is the subsidized housing community in the lower east side of new york city a dynamic or fixed population? briefly explain the rationale for your answer. dynamic population it can changeable people can move out and move in into the population of a subsidized housing what was the prevalence of tb in the screened community on january 1st? prevalence = 30/500 0.06= 6% what was the prevalence of tb on june 30th? prevalence= 40/450=0.08= 8.88% what was the cumulative incidence of tb over the year? cumulative incidence = number of new cases/number in candidate population)over specified time period 10/450 = 2.2% suppose that you wanted to calculate the incidence rate of tb in the study population. calculate the amount of person-time that would go in the denominator of this incidence rate. be sure to show your work.