Mathematics, 19.07.2021 18:40 leedleee
Some people think using magnets can reduce back pain. Two groups of people suffering from back pain are given treatments to test this theory, one group is treated with magnets and the other group is treated with nonmagnetic pieces of metal. Reduction in pain is measured with a scale from 0 to 1, where the larger the number, the larger the pain reductions. Below is a summary of the results: Magnets Nonmagnetic Sample Size 20 20 Sample Mean 4.7 4.4 Sample Standard Deviation s 1.2 1.4
a. Find a 90% confidence interval for the differences in the mean pain reduction.
b. Is there evidence that Magnets help reduce back pain?
Answers: 1
Mathematics, 21.06.2019 16:50
Its worth 10000000 points need asap if you answer correctly ill mark brainliest
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Mathematics, 21.06.2019 20:00
Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?
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Mathematics, 21.06.2019 22:00
Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?
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Some people think using magnets can reduce back pain. Two groups of people suffering from back pain...
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