Reference no: EM13954648
5. The fracture strength of tempered glass averages 14 (measured in thousands of pounds per square inch) and has standard deviation 2.
a. What is the probability that the average fracture strength of 100 randomly selected pieces of this glass exceeds 14.5?
b. Find an interval that includes, with probability 0.95, the average fracture strength of hundred randomly selected pieces of this glass.
c. Find n such that the probability that the average fracture strength of n randomly selected pieces of this glass exceeds 14.5 will equal to 0.95.
6. According to a survey conducted by the American Bar Association, 1 in every 410 Americans is a lawyer, but 1 in every 64 residents of Washington, D.C. is a lawyer.
a. If you select a random sample of 1500 Americans, what is the approximate probability that the sample contains at least on lawyer?
b. If the sample is selected from among the residents of Washington, D.C., what is the approximate probability the sample contains more than 30 lawyers?
c. If you stand on a Washington, D.C. street corner and interview the first 1000 persons who walked by and 30 say that they are lawyers, does this suggest that the density of lawyers passing the corner exceeds the density within the city? Explain.
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Effectively deploy those resources and capabilities
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Understanding of the position and performance
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Probability the sample contains more than 30 lawyers
: Find an interval that includes, with probability 0.95, the average fracture strength of hundred randomly selected pieces of this glass.
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Determine the current freight bill for the above shipments
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: In the ASC's handbook, Accounting for the Effect of Changing Prices, accountants are faced with a choice of systems of accounting when dealing with the effects of inflation.
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