Mathematics, 09.12.2019 20:31, kps26pd2mea
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 44 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 ? = 7.40 ml/kg for the distribution of blood plasma.
(a) find a 99% confidence interval for the population mean blood plasma volume in male firefighters. 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.)
? is known
the distribution of weights is normal
the distribution of weights is uniform
n is large
? is unknown
(c) give a brief interpretation of your results in the context of this problem.
1% of the intervals created using this method will contain the true average blood plasma volume in male firefighters. the probability that this interval contains the true average blood plasma volume in male firefighters is 0.99. the probability that this interval contains the true average blood plasma volume in male firefighters is 0.01. 99% of the intervals created using this method will contain the true average blood plasma volume in male firefighters.
(d) find the sample size necessary for a 99% confidence level with maximal error of estimate e = 2.20 for the mean plasma volume in male firefighters. (round up to the nearest whole number.) male firefighters
Answers: 3
Mathematics, 21.06.2019 13:50, daytonalive7193
Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean
Answers: 2
Mathematics, 21.06.2019 23:30, johnlumpkin5183
Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.
Answers: 2
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