Mathematics, 14.12.2019 05:31 edsimms21111
From generation to generation, the mean age when smokers first start to smoke varies. however, the standard deviation of that age remains constant of around 2.1 years. a survey of 40 smokers of this generation was done to see if the mean starting age is at least 19. the sample mean was 18.1 with a sample standard deviation of 1.3. do the data support the claim at the 5% level?
Answers: 3
Mathematics, 21.06.2019 18:30
Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2
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Mathematics, 21.06.2019 19:30
If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b
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The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet
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Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.
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From generation to generation, the mean age when smokers first start to smoke varies. however, the s...
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