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Sometimes ecologists carry out controlled experiments by isolating and changing a variable in part of an area and comparing the results with nearby unchanged areas. Group of answer choices True False 

          Sometimes ecologists carry out controlled experiments by isolating and changing a variable in part of an area and comparing the results with nearby unchanged areas.
Group of answer choices
True
False

Added by Ana N.

Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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Sometimes ecologists carry out controlled experiments by isolating and changing a variable in part of an area and comparing the results with nearby unchanged areas. Group of answer choices True False
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Transcript

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00:01 As reported by cdc, center for disease control, 18 % of high school students they smoke tobacco.
00:15 You randomly select 120 high school students and try to survey them on their attitudes towards smoking in the movies.
00:33 So we need to find out expected number of smokers.
00:40 Standard deviation sigma number of smokers.
00:46 Standard deviation of the number of smokers.
00:51 Apart from expected number of smokers.
00:56 Let x be the number of high school students who smoke.
01:05 High school students who smoke...
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