Mathematics, 20.08.2019 19:10 hardwick744
The composition of the earth's atmosphere may have changed over time. to try to discover the nature of the atmosphere long ago, we can examine the gas in bubbles inside ancient amber. amber is tree resin that has hardened and been trapped in rocks. the gas in bubbles within amber should be a sample of the atmosphere at the time the amber was formed. measurements on specimens of amber from the late cretaceous era (75 to 95 million years ago) give these percents of nitrogen: 63.4 65.0 64.4 63.3 54.8 64.5 60.8 49.1 51.0 assume (this is not yet agreed on by experts) that these observations are an srs from the late cretaceous atmosphere. use a 96% confidence interval to estimate the mean percent of nitrogen in ancient air. % to %
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Mathematics, 21.06.2019 20:30
Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.
Answers: 3
Mathematics, 22.06.2019 00:00
The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle
Answers: 2
The composition of the earth's atmosphere may have changed over time. to try to discover the nature...
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