Mathematics, 06.05.2020 05:00 lex7429
In 2000, the mayo clinic conducted a study of whether air dryers eliminate more germs than paper towels. researchers recruited 100 peop, e contaminated their hands, and then instructed them to wash with soap and water for one minute. afterward, they randomly assigned 50 participants to run their hands under a warm air dryer for a single 30 second cycle and 50 participants to use a paper towel for 15 seconds. the methods did not produce a significant difference in the mean bacterial counts. what type of study is this?
Answers: 1
Mathematics, 21.06.2019 17:20
Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?
Answers: 2
Mathematics, 21.06.2019 21:00
How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?
Answers: 3
Mathematics, 22.06.2019 00:00
If (x + 8) is a factor of f(x), which of the following must be true? both x = β8 and x = 8 are roots of f(x). neither x = β8 nor x = 8 is a root of f(x). f(β8) = 0 f(8) = 0
Answers: 3
In 2000, the mayo clinic conducted a study of whether air dryers eliminate more germs than paper tow...
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