Luc randomly selected 40 students and asked them whether they had ever gone snowboarding. he repeated this survey using the same method three more times.
do any of the surveys appear to be biased?
ever gone snowboarding? survey
1 2 3 4
yes 10 13 2 12
no 30 27 38 28
a.
yes, because the results from survey 3 differ significantly from results from surveys 1, 2, and 4, which agree.
b.
yes, because all four surveys do not have identical results.
c.
no, because although the results differ among the four surveys, the sample method used for all was the same.
d.
no, because all four surveys have about the same number of people saying “yes” and about the same number of people saying “no.”

Anthony is making a collage for his art class my picking shapes randomly. he has five squares, two triangles, two ovals, and four circles. find p( circle is chosen first)

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?