a. Find a 90% confidence interval for the population mean concentration of uric acid in this patient’s blood. What is the margin of error? b. Find a 99% confidence interval for the population mean concentration of uric acid in this patient’s blood. What is the margin of error? c. Compare the margins of error for parts (a) and (b). As confidence levels increase, do margins of error increase?

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 seven blood tests for uric acid. The mean concentration was x = 5.39 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.93 mg/dl. 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   What conditions are necessary for your calculations? (Select all that apply.)   σ is known σ is unknown n is large uniform distribution of uric acid normal distribution of uric acid   Find the sample size necessary for a 95% confidence level with maximal margin of error E = 1.02 for the mean concentration of uric acid in this patient's blood. (Round your answer up to…

The percentile rank of the data value with z = 2 using the empirical rule is ? (rounded to one decimal place).

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 50 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.20 ml/kg for the distribution of blood plasma.

Diagnostic Tests: Uric Acid –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 eight blood tests for uric acid. The mean concentration was x̅= 5.32mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal with σ = 1.80mg/dl. a)Find a 90% confidence interval for the population mean concentration of uric acid in this patient’s blood. What is the margin of error? b)Find the sample size necessary for a 90% confidence level with maximal margin of error E = 1.50for the mean concentration of uric acid in this patient’s blood.

find the percentile rank of the pathologic tumor size 2cm tumor size f rel.f cf 4 3 0.25 12 3 2 0.17 9 2 2 0.17 7 1 5 0.42 5   n=15

One group of accounting students took a distance learning class, while another group took the same course in a traditional classroom. At α = .10, is there a significant difference in the mean scores listed below?  Exam Scores for Accounting Students Statistic Distance Classroom Mean scores x¯1x¯1 = 9.7 x¯2x¯2 = 10.0 Sample std. dev. s1 = 2.7 s2 = 2.9 Number of students n1 = 23 n2 = 23   Specify the decision rule. (Round your answers to 3 decimal places. A negative value should be indicated by a minus sign.) Find the test statistic tcalc. (Round your answer to 4 decimal places. A negative value should be indicated by a minus sign.) Use Excel to find the p-value. (Round your answer to 3 decimal places.)

Find the z- score for which the area under the standard normal curve to its right is 0.09.

The area to the right of z=2.33 under the standard normal curve is

Over the past several months, an adult patient has been treated for tetany (svere muscle spasms). This condition is associated with an average total calcium level below 6 mg/dl. Recently, the patient's total calcium tests gave the following readings (in mg/dl). Assume that the population of x values has an approximately normal distribution. X = 9.8 S = 8.9 10.4 9.2 9.2 9.9 10.7 10.2 11.6 11.5 (a) Find the sample mean reading x and the sample standard deviation s. (Round your answers to four decimal places.) mg/dl mg/dl USE SALT (b) Find a 99.8% confidence interval for the population mean of total calcium in this patient's blood. (Round your answer to two decimal places.) lower limit upper limit mg/dl mg/dl (c) Based on your results in part (b), do you think this patient still has a calcium deficiency? Explain. O Yes. This confidence interval suggests that the patient may still have a calcium deficiency. O Yes. This confidence interval suggests that the patient no longer has a calcium…