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Question: A music school has budgeted to purchase three musical instruments. They plan to purchase a piano costing $3,000, a guitar costing $550, and a drum set costing $600. The mean cost for a piano is $4,000 with a standard deviation of $2,500. The mean cost for a guitar is $500 with a standard deviation of $200. The mean cost for drums is $700 with a standard deviation of $100. Which cost is the lowest, when compared to other instruments of the same type? Which cost is the highest when compared to other instruments of the same type. Justify your answer.
a box contains 10 balls numbered 12...10. two balls are selected at random without replacement.a find the probability
Both days have sample standard deviations of 3.4. Is the average mean of size different from day 1 to day 2?
Consider the random sequence. - where is a Cauchy random variable with PDF,- Determine which forms of convergence apply to this random sequence.
The ideal estimator of location would have a smaller standard error than any other estimator we might use. Explain why such an estimator does not exist.
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity).
assume that we have two events a and b that are mutually exclusive. assume further that we know pa .30 and pb .40.a.
State the null and alternative hypotheses, in words and in symbols., The five stocks that Sara recommended to Daniela had returns of +10%, -15%, +5%, +30%, and -5% over the one-year trial period. (The overall stock market, as measured by the S&P 500..
Write the hypothesis statement. What distribution are you using?
What is the alternative hypothesis for a null hypothesis stating that the average time a person keeps a cell phone is, at most, three years?
annoyco a large consumer products firm has recently introduced a new product. as part of the launch 25 of the customers
morens department store has a special sale whereby each customer upon checkout chooses a random ticket that is labeled
sixty percent of all road accidents are due to distracted driving. in a random sample of 100 accidents what is the
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