subject
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?

ansver
Answers: 1

Another question on Mathematics

question
Mathematics, 21.06.2019 16:00
Select the correct answer. in the figure, angle k measures 45°. what is the measurement of angle c? a. 38° b. 45° c. 90° d. 98°
Answers: 2
question
Mathematics, 21.06.2019 17:30
One integer is 5 more than another. their product is 104. find the integers
Answers: 2
question
Mathematics, 21.06.2019 18:30
The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?
Answers: 1
question
Mathematics, 22.06.2019 01:00
How many zeros does this polynomial function, y=(x-8)(x+3)^2
Answers: 1
You know the right answer?
Some people think using magnets can reduce back pain. Two groups of people suffering from back pain...
Questions
question
Biology, 13.08.2020 18:01
question
English, 13.08.2020 18:01
question
History, 13.08.2020 18:01
Questions on the website: 13722360