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At the end of the Halloween Festival organizers evaluated that family of participants spent in average $50.00 with standard deviation of $15.00. If 49 participants (49 = size of the sample) are chosen randomly, what is the probabilty that their mean spent amount will be in $6 of population mean? (mean+/-6)
10 cartons are taken at random from an automatic filling machine.The mean net weight of the carton is11.8 kg and standard deviation of 0.15kg. Does the sample mean differ significantly from the intended weight of 12kgs?
What different types of variables are used in quantitative studies? Describe each type of variable and how they differ.
The following table lists the annual amounts of glass cullet produced by Kimble Glass Works, Inc. Determine the least squares trend equation. Estimate the amount of scrap for the year 2005.
Find the margin of error for the 95% confidence interval used to estimate the population proportion.
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
Using the original data, estimate the population standard deviation with 90% probability.
If alpha level is changed from a = 0.05 to a = 0.01. What occurs to boundaries for critical region?
The population standard deviation is σ2 = 7. Test that the population means differ using a 1% significance level.
A random sample of 1440 current job applicants results in 61 failures (based loosely on data from the American Management Association).
If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
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