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Question - A random variable. Suppose that the random variable X has mean 10 and variance 25.
(a) Find the mean and standard deviation of 2X.
(b) Find the mean and standard deviation of -2X.
How much production capacity should the manufacturer reserve for the last day?
These are objective questions discuss about normal curve. The first question is about the difference between left half and right half of a curve and the second question is about the 5th percentile in a standard normal curve
New production methods stressing teamwork have recently been instituted at car manufacturing plants in Detroit. Three teamwork production methods.
mamma temte bakes 6 pies a day that costs 2 each to produce. on 28 of the days she sells only 2 pies. on 25 of the days
Draw a graph that displays the distribution of Global Sales. Be sure to comment on the distribution. Does it appear normally distributed?
In July of 2004, the Gallup Poll asked 1005 U.S. adults if they actively try to avoid carbohydrates in their diet. That number increased to 27% from 20% in a similar 2002 poll. Is this a statistically significant increase? Explain.
Why and how did the USA get involved in the war in Vietnam? What was the Gulf of Tonkin Resolution? Why did President Lyndon Johnson propose it and why did Congress pass it? Do you think the USA should have sent troops to Vietnam? Why or why not?
Is the sample median a biased estimator of the population mean? Why do we usually prefer the sample mean to the sample median as an estimator for the population mean?
What is the probability that a randomly chosen member of the population in the area will be exposed to at least one method of advertising during a given week?
The mean sales during the winter months was $995 with a standard deviation of $100. At 0.02 significance level can we conclude there is a difference in sales between the two seasons? Find the p value
The following are the percentages of ash content in 12 samples of coal found in close proximity:9.2, 14.1, 9.8, 12.4, 16.0, 12.6, 22.7, 18.9, 21.0, 14.5, 20.4, 16.9- Find the sample mean
If the value of σ may be anywhere between 0.010 and 0.020 inch, tabulate the minimum sample size required for σ values from 0.010 to 0.020 inch.
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