Mathematics, 26.11.2019 01:31 joynerjaila
Our environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 5.4 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 9 samples is 5.0 ppm with a variance of 0.64. assume the population is normally distributed. a level of significance of 0.02 will be used. find the value of the test statistic. round your answer to three decimal places.
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Factor the expression using the gcf. the expression 21m−49n factored using the gcf
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Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.
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Our environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone...
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