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.)

Overproduction of uric acid in the body can be an indication of cell breakdown. this may be an advance indication of illness such as gout, leukemia, or lymphoma.† over a period of months, an adult male patient has taken nine blood tests for uric acid. the mean concentration was x = 5.35 mg/dl. the distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.87 mg/dl. (a) find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. what is the margin of error? (round your answers to two decimal places.) lower limit upper limit margin of error (b) what conditions are necessary for your calculations? (select all that apply.) σ is unknown n is large σ is known normal distribution of uric acid uniform distribution of uric acid (c) interpret your results in the context of this problem. there is not enough information to make an interpretation. the probability that this interval contains the true average uric acid level for this patient is 0.05. the probability that this interval contains the true average uric acid level for this patient is 0.95. there is a 95% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. there is a 5% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. (d) find the sample size necessary for a 95% confidence level with maximal margin of error e = 1.10 for the mean concentration of uric acid in this patient's blood. (round your answer up to the nearest whole number.) blood tests