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From several yars of sales records, store management has determined that a week demand for some items has a normal distribution with the mean of 563 units, and the standard deviation of 112 units.. What is the probability that the demand for this item in the upcoming week will be between 600 and 700 units.
Chance of tripling your investment in a year and a .3 chance of halving your investment in a year. What is the standard deviation of the rate of return on this investment?
We will select a random sample of 8 cigarettes and conduct a hypothesis test at the 10 % level of significance to determine whether the true mean nicotine content of all cigarettes differs from 8.4 mg.
Determine the standard error of students that favoured the move.
Five children under twelve are selected at random. The probability that the average number of hours that they spend each week watching television is at least 30 is about?
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
The standard deviation for the costs of all doctors visits is $35.15, estimate with 95% confidence the average cost of a doctors visit for all the patients of this medical clinic.
Find a 99% confidence interval for the population mean number of weekly miles.
Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.
A fast-food franchiser is considering building a restaurant at a certain location. Based on financial analysis, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour.
Find the critical t-value that corresponds to 90% confidence. Assume 90 degrees of freedom.
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
How many more days should be included in the sample to be 95% sure the population mean μ is within $50 of the sample mean x?
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