Mathematics, 13.12.2019 19:31 Dweath50
Ajournal published a study of the lifestyles of visually impaired students. using diaries, the students kept track of several variables, including number of hours of sleep obtained in a typical day. these visually impaired students had a mean of 8.89 hours and a standard deviation of 2.11 hours. assume that the distribution of the number of hours of sleep for this group of students is approximately normal. complete parts a through c.
a. find p(x < 6). p(x < 6) = (round to four decimal places as needed.)
b. find p(8 lessthanorequalto x lessthanorequalto 10) p(8 lessthanorequalto x lessthanorequalto 10) = (round to four decimal places as needed.)
c. find the value a for which p(x < a) = 0.2. (round to two decimal places as needed.)
Answers: 3
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?
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Mathematics, 21.06.2019 21:30
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Ajournal published a study of the lifestyles of visually impaired students. using diaries, the stude...
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