Mathematics, 18.12.2019 04:31, usjajdjajfj2ot929
The centers for disease control and prevention (cdc) define a healthy sleep duration to be at least seven hours per day. the cdc reports that the percentage of people who report a healthy sleep duration varies by marital status. the cdc also reports that in 2018, 67% of those who are married report a healthy sleep duration; 62% of those who have never been married report a healthy sleep duration; and 56% of those who are divorced, widowed, or separated report a healthy sleep duration. the file sleephabits contains sample data on the sleeping habits of people who have never been married that are consistent with the cdc's findings. use these data to answer the following questions.
(a)develop a point estimate for the proportion of those who have never been married who report a healthy sleep duration. (round your answer to two decimal places.)
(b) develop a point estimate for the mean number of hours of sleep for those who have never been married. (round your answer to four decimal places.)
(c)for those who have never been married, estimate the number of hours of sleep per day for those who report a healthy sleep duration. (round your answer to four decimal places.)
Answers: 3
Mathematics, 21.06.2019 13:30, angelina0miles
For which rational expression is -2 an excluded value of x?
Answers: 1
Mathematics, 22.06.2019 01:00, sdwhitneyhillis
Arrange the steps to solve this system of linear equations in the correct sequence. x + y = -2 2x – 3y = -9 tiles subtract 3x + 3y = -6 (obtained in step 1) from 2x – 3y = -9 (given) to solve for x. substitute the value of x in the first equation (x + y = -2) to get y = 1. the solution for the system of equations is (-3, 1). x = -15 the solution for the system of equations is (-15, 13). add 3x + 3y = -6 (obtained in step 1) to 2x – 3y = -9 (given), and solve for x. x = -3 substitute the value of x in the first equation (x + y = -2) to get y = 13. multiply the first equation by 3: 3(x + y) = 3(-2) 3x + 3y = -6.
Answers: 1
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