Many birds are injured or killed by flying into windows. it appears that birds don't see windows. can tilting windows down so that they reflect earth rather than sky reduce bird strikes? place six windows at the edge of a woods: two vertical, two tilted 20 degrees, and two tilted 40 degrees. during the next four months, there were 53 bird strikes, 31 on the vertical window, 14 on the 20-degree window, and 8 on the 40-degree window. if the tilt has no effect, we expect strikes on all three windows to have equal probability.

the p-value for the test is,
a) 0.01 < p < 0.02.
b) 0.0025 < p < 0.001.
c) p < 0.005.
d) 0.0005 < p < 0.001.

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?