Mathematics, 27.02.2020 00:50 Zykuko
Radioactive fallout from testing atomic bombs drifted across a region. There were 220 people in the region at the time and 36 of them eventually died of cancer. Cancer experts estimate that one would expect only about 33 cancer deaths in a group this size. Assume the sample is a typical group of people. a) Is the death rate observed in the group unusually high? b) Does this prove that exposure to radiation increases the risk of cancer?
Answers: 3
Mathematics, 21.06.2019 18:30
Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.
Answers: 1
Mathematics, 21.06.2019 19:00
Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?
Answers: 3
Mathematics, 21.06.2019 19:30
Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab
Answers: 1
Mathematics, 21.06.2019 23:50
Apolynomial has two terms. check all of the factoring methods that should be considered. common factor difference of cubes sum of cubes difference of squares perfect-square trinomial factoring by grouping
Answers: 3
Radioactive fallout from testing atomic bombs drifted across a region. There were 220 people in the...
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