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The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 and 459.
Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 27 trucks has a standard deviation of 6.8 minutes.
What fraction of the calls last between 4.2 and 5 minutes?
A partial computer output from a regression analysis as follows. The regression equation is:
We suggest that you use the graphical approach to CVP analysis to solve the following problem, but you may use any other method to find the answer.
Determine probability that number of boats constructed next month will be between 4 and 7 (both inclusive).
If μ represents the mean increase in the verbal SAT score if all high school students used the method, the alternative hypothesis the teacher wishes to test is what?
Let X equal the number of "ones" if a fair dice is tossed two independent times by someone out in the hall. If X=x that person gives the player a bowl consisting of 10-3x red chips and 3x white chips.
Samples are shown of volatility (coefficient of variation) for sector stocks over a certain period of time.
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Formulate a linear programming model for this problem (using QM on Windows and/or Excel on Windows)
Small Wonder, an amusement park, experiences seasoned attendance. It has collected two years of quarterly attendance data and made a forecast of annual attendance for the upcoming year.
Finding Normal probabilities using standard normal table or Excel built in functions
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