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Required sample size for specified margin of error. A new bone study is being planned that will measure the biomarker tartrate-resistant acid phosphatase, or TRAP. In a study of bone turnover in young women, serum TRAP was measured in 31 subjects.
The units are units per liter (U/l). The mean was 13.2 U/l with a standard deviation of 6.5 U/l. Based on these values, find the sample size required to provide an estimate of the mean TRAP with a margin of error of 1.5 U/l for 95% confidence.
Mary randomly picks three marbles from a jar that contains 3 red and 5 blue marbles.
Determine how long until the population of your city doubles assuming a steady growth rate - Discuss factors that could possibly influence the growth rate of your city and state.
If the gas mileages are normally distributed with a standard deviation of 2.1, find the probability that a car has a gas mileage of between 29.2 and 30.3 miles per gallon.
regression analysis is used when the independent variable is nominal or ordinal in nature.a. trueb.
On each draw, you bet half of your present fortune that you will draw a white ball. What is your expected final fortune?
A sample space includes the events A, B, and C. Draw a Venn diagram in which events A and B are mutually exclusive but events B and C are not mutually exclusive.
What is the points estimate of the proportion of the population of working parents who feel they spend too little time with their children because of work commitments? What is the margin of error for 95% confidence level
A player has only one money unit and wishes to increase his fortune to five units. To do so, he plays independent repetitions of a game that, in case of a win, yields double the sum he betted.
A person claims to have ESP (extrasensory perception). A coin is tossed 16 times, and each time the person is asked to predict in advance whether the coin will land heads or tails.
Let X denote the waiting time until the tenth call arrives. What is the pdf of X? What are the moment generating function, mean , and variance of X?
1. For the y and x values listed in file XR15066, obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram, (b) using a normal probability plot, (c) plotting the residuals versus the x values, and ..
to evaluate the effect of a treatment a sample is obtained from a population with a mean of u 30 and the treatment is
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