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In given problem, suppose the auditor wants to estimate the proportion of all the firm's accounts receivable with amounts over $100. Give a point estimate of this parameter.
Problem An auditor selected a random sample of 12 accounts from all accounts receivable of a given firm. The amounts of the accounts, in dollars, are as follows: 87.50, 123.10, 45.30, 52.22, 213.00, 155.00, 39.00, 76.05, 49.80, 99.99, 132.00, 102.11. Compute an estimate of the mean amount of all accounts receivable. Give an estimate of the variance of all the amounts.
We consider a queueing system in which ordinary customers arrive according to a Poisson process with rate λ and are served in a random time having an exponential distribution, with parameter μ, by either of two servers.
Determine the least square trend equation. Estimate the number of employees in 2008. By how much the number of employees decreases (or increases) per year on the average?
Construct a histogram for these data. The component lifetimes are supposed to be exponentially distributed. Does this seem like a reasonable assumption? Explain. Estimate the parameter of the exponential distribution and explain what it means.
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
An industrial chemical to retard the spread of fire in paint has been developed. From past experience, 48% of sales calls will result in an order.
How would you go about studying a nonlinear or curvilinear relationship between two variables using contingency tables and chi-square tests? Provide examples from you own professional experience.
in a hospital shipment of 3500 insulin syringes 14 were unusable due to defecta. is this sufficinet ecidence to reject
In the world of finance, the buying of stocks and shares can be a risky business. The risk associated with share trading is given by a share's volatility which measures the scale of fluctuations in the price of a share over a past period of time -..
the relationship assumed linear between yield of bourbon y and aging time x was studied by observing yields yi from
Diversi?cation works better when the investments in a portfolio have small correlations. To demonstrate this, suppose that returns on 500 Index Fund and Diversi?ed International Fund had the means and standard deviations we have given but were unc..
a recent survey found that 86 of the population has never been a victim of a violent crime. if a sample of 13 is
Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
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