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Suppose that you computed a 95% confidence interval for a population mean.
The user of the statistics claims your interval is too wide to have any meaning in the specific use for which it is intended. Discuss and compare two methods of solving this problem.
comparing continuous distributionsthe lifetime of one of dotcoms electronic equipment has a mean of 400 hours and
The sampling plan below was used in a statistical audit. The columns of the table list the strata indices, strata sizes, sample sizes and a description of the strata. Calculate an estimate of the average error per case in the sampling frame (popul..
Discuss the advantages and disadvantages of different types of financing:
suppose that annual precipitation in a midwestern city follows a normal distribution with a mean of 25 inches and a
Calculate the mean and variance of X. Calculate the mean and variance of Y. Calculate the covariance and correlation between X and Y. Is there a positive or negative relationship between X and Y? Is the relationship strong, weak or moderate?
Decrease your sales price by $5 in order to increase sales by 5,000 units. Which of the above alternatives would your choose to increase profits?
the following bootstrap output is for mileage of a random sample of 25 mustang cars.based on a 90 confidence interval
Camera batteries has a standard deviation of 2.1 months. Assume the variance is normally distributed. Do you fell that the lifetimes of the batteries are relatively consistent?
A high-performance aircraft, shown in Figure DP7.1 (a) uses the ailerons, rudder, and elevator to steer through a three-dimensional flight path [20]. The pitch rate control system for a fighter aircraft at 10.000 m and Mach 0.9 can be represented..
a utility company serves 50000 households. as part of a survey of customer attitudes they take a simple random sample
at a dog park 35 of dogs are purebred and the rest are mixed breeds. 40 of the dogs are aggressive. at the same time we
If only 1.1% of the bus drivers have a weekly income of more than $429.35, what is the value of the standard deviation of the weekly earnings of the bus drivers?
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