3. Data set shown below is from the text. 30. Average Income The following data represent the median
household income (in dollars) for the 50 states and the District
of Columbia in 2013,
39,622 42,499 48,801 52.888 55,258 60.907 67620
39.919 43,749 50.121 53,027 55,700 61.137 67781
40.241 43.777 50,311 53,774 56,307 61,408 71,322
40,850 44.132 50.553 53.843 57196 61,782
41,208 45,369 50.602 53,952 57,528 62,963
41,381 46,398 51,485 54.453 57812 62.967
42.127 47,439 51.767 54,842 60.106 63.371
42,158 47886 52.219 54,855 60,675 65,262
Source U. S. Census Bureau
Complete the following frequency distribution and compute the relative frequencies (as
decimal values, rounded to 3 decimal places. (12 pts.)
Frequency
Relative Frequency
Median household
income
30,000 - 39,999
40,000 - 49,999
50,000 - 59,999
60,000 -69,999
70,000 - 79,999
Total

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