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A vendor of seasonal items wants to purchase a number of Christmas trees for the upcoming season. Based on previous years' records, she estimates demand for Christmas trees at her shop to be a normally-distributed random variable with mean μ = 250 and standard deviation σ = 50. If the purchase price for a tree is po = €30 which she then sells at ps = €50, assuming she cannot recover any value at all from any unsold tree, what is the quantity of trees she should purchase in order to maximize her expected profits?
a company generally purchases large lots of a certain kind of electrical devices. a method is used that rejects a lot
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below.
Explain what a nonparametric test is, and state one disadvantage of having to use a non-parametric test. Describe a research study where the outcome variable may warrant the use of nonparametric statistics over parametric statistics.
How should the candidate purchase the five commercials to maximize the estimated number of additional voters?
an eye care health clinic experiences 15 customers arrive every 60 minutes between 1200-100 mid day. there are three
This includes knowing how to use an ANOVA for managerial decisions. Present a business example where you would use an ANOVA. State the hypothesis verbally and numerically.
To help schedule staffing and equipment needs, a large hospital uses a multiple regression model to predict its 'bed census' y, the number of beds occupied at the end of each day.
The KW water is provided to approximately 750,000 people, who are served through more than 362,000 accounts. All accounts are metered and billed monthly.
study the following minitab output from a regression analysis to predict y from x.a. what is the equation of the
an array of 30 led bulbs is used in an automotive light. the probability that a bulb is defective is 0.001 and
Create probability tree showing all marginal, conditional, and joint probabilities. Create a joint probability table.
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