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Assume that blood pressure readings have a mean of 120 and a standard deviation of 8. What blood pressure would you have to exceed to be in the highest 10% of this population?
Hint: You basically need to find the probability of interest in your Z table and plug that value in for Z. Using the formula, then solve for X. We are looking for the highest 10% and we know that the Z table is left sided (so look up 90% in the table to get the Z value, once you have that you can plug in the value for Z and solve).
A Coach in a large secondary school thinks that ballet training will improve his football teams scoring average/game. He has half of the team members take ballet lessons before the season.
The average cost of a one bedroom apartment in a town is $550 per month. What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviat..
a. Construct the four-quarter centered moving average for these data and determine the percentages of the moving average for the quarters. b. Determine the seasonal indexes for the quarters.
The class average on a statistics test is 65 marks with a standard deviation of 10 marks. What minimum mark must a student obtain to be in the top 11%
Conduct a hypothesis with a significance level of 0.05. What is the test statistic?
In a case/control study of patients with gallstones, information on coffee consumption was obtained. Among the 80 controls, 35 reported drinking at least.
Use the data of Exercise 11 to approximate the mean, variance, and standard deviation of the random variable X, the percentage ash content of a particular
Construct the confidence interval for the population mean, µ, if c = 0.99.
An article entitled "Piano Lessons Boost Math Scores" states that "second-grade students who took piano lessons for four months
If the 16bit data to be sent is a Hex decimal value 5100 and the barker code is 5100 in decimal.
Movie Review: Elizabeth(1998) Object: Use legitimate historical sources to help you determine how factual this movie actually is.
GRADE DISTRIBUTIONS The grade distribution for a certain class is shown in the following table.
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