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Total sales of cranes in a month is modelled as Normal with a mean of 12.6 and a standard deviation of 2. What is the probability of sales between 10 and 15 cranes?
Mr. Starnes believes that less than 75% of the students at his school completed their math homework last night.
What is the probability that a randomly selected depth is between 2.25 meters and 5.00 meters?
Assume that the standard deviation is 12 and the number of bilingual doctors in a hospital is normally distributed. Include an appropriately labeled.
Is it an SRS? A corporation employs 2000 male and 500 female engineers. A stratified random sample of 200 male and 50 female engineers gives each engineer.
What is the probability that a U.S. user who downloads music, selected at random, obtained it from either the United States or Canada.
The Positively Charged company uses capacitors from two different manufacturers. Historically, 60% of the capacitors come from manufacturer 1
(a) Use an appropriate computer program to fit a plane to the following data relating the monthly water usage of a production plant (gallons) to its monthly production (tons), mean monthly ambient temperature (?F), and the monthly number of days o..
Using a .05 level of significance, test the hypothesis that there is no difference between the starting annual salaries of public accountants and financial planners. What is your conclusion?
A mining company finds that daily lost-work injuries average 1.2. If the local union contract has a clause requiring that the mine be shut down as soon as three workers incur lost-work injuries, on what percentage of the days will the mine be ope..
2 cards drawn from a 52 but before the second card is drawn you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent and why?
Why is it best to compare medians and interquartile ranges for these data, rather than comparing means and standard deviations?
On a multiple-choice test with five possible answers for each question, what is the probability of answering a question correctly if you make a random guess?
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