Mathematics, 12.02.2020 03:59, eggoysters
A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a reading comprehension test. Based on this sample, a 90% confidence interval for the mean improvement in test scores for all sixth-graders in the city taking this course is found to be (12.6, 14.8). Which of the following are the sample mean and margin of error on which this interval is based?A. Sample Mean = 13.7; Margin of Error = 1.1B. Sample mean = 13.7; Margin of Error = 2.2C. Sample mean is unknown; Margin of Error = 2.2
Answers: 2
Mathematics, 21.06.2019 12:30, liliaboop8618
Seth practice piano for 1 1/3 hours on saturday and 5/6 hour on sunday for much longer did he practice on saturday than on sunday?
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Mathematics, 21.06.2019 14:30, nunnielangley0
The contents of 3838 cans of coke have a mean of x¯¯¯=12.15x¯=12.15. assume the contents of cans of coke have a normal distribution with standard deviation of σ=0.12.σ=0.12. find the value of the test statistic zz for the claim that the population mean is μ=12.μ=12.
Answers: 1
Mathematics, 21.06.2019 22:30, 24lfoster
Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.
Answers: 1
Mathematics, 21.06.2019 22:40, winterblanco
Use this graph to find the cost of 6 show tickets
Answers: 1
A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a re...
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