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Jessica William, manager of kitchen appliances for the Midtown Department Store, feels that her inventory levels of stoves have been running higher than necessary. Before revising the inventory policy for stoves, she records the number sold each day over a period of 25 days, as summarized below.
2 stoves in 4 days3 stoves in 7 days4 stoves in 8 days5 stoves in 5 days6 stoves in 1 day
a) Use these data to estimate the probability distribution of daily sales.b) Calculate the mean of the distribution obtained in part a.c) Use the random numbers 0.3544, .08766, and .05478 to simulate daily sales over three days.d) Compare the average with the mean obtained in part b.e) Formulate a spreadsheet model for performing a computer simulation of the daily sales. Perform 250 replications and obtain the average of the sales over the replications.
Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighted on a very accurate scale. The results in grams were:
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
Find the largest number of room reservations that this hotel can book and still be at least 95% sure that everyone who shows up at the hotel will have a room on a given night.
If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
Auditor wants to be within 7% of true proportion when using 95% confidence level. How many files should auditor sample?
Can you conclude that there is a higher proportion of U.S. companies offering high-deductible health insurance plans to their workers in 2006 than in 2005?
Industry standards suggest that 13 percent of new vehicles require warranty service within the first year. Compute the mean and standard deviation of this probability distribution.
A researcher wishes to estimate within $300 the true average amount of money a country spends on road repairs each year. If she wants to be 90% confident, how large a sample is necessary? The standard deviation is known to be $900.
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
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