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A 100-W light source consists of a filament that is in the form of a thin rectangular strip, 5 mm long by 2 mm wide, and radiates as a blackbody at 2900 K.
(a) Assuming that the glass bulb transmits all incident visible radiation, what is its efficiency? The efficiency is defined as the ratio of the visible radiant power to the consumed electrical power.
(b) Determine the efficiency as a function of filament temperature for the range from 1300 to 3300 K.
a sample of 2 different calculators is randomly selected from a group containing 18 that are defective and 37 that have
Utilizing the .05 level, do the results support the psychologists' theory. Elucidate your answer to somebody whom has never had a course in statistics.
With a sample of n=6 children, the researcher obtains a sample mean of X=18.3 kg. Show values for Z critical and Z calculated. Calculate all values for Z to two decimal places (x.xx)
Use a 95% CI to estimate the difference between the proportions of men and women managers who are married. Interpret the interval and what is the conclusion in terms of the populations from which the samples were drawn.
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
Suppose 10 smokers are randomly selected and the number of smokers who started to smoke before the age of 18 is recorded. a) explain why this is binomial experiment.
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. Find the probability that the family's monthly gasoline purchases will be between 86 and 96 gallons.
A study of 20 worldwide financial institutions shows the correlation between their assets and pretax profit to be .86. At the .05 significant levels, can we conclude that there is positive correlation in the population?
What is the probability that none of the next eight customers who order beer will order light beer? What is the probability that one customer will? What is the probability that two customers will?
a. determine the sample size required to estimate a population proportion to within 0.032 with 97.8 confidence
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Draw the complete decision tree and determine whether the product should be launched or not.
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