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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 population has a mean of 81 and standard deviation of 25. find the mean and standard deviation of sampling
what do they mean? with confidence interval? im just starting out and this is part of our homework for class. i dont
A Variable has a mean of 100 and a standard deviation of 16. Four observations of this variable have a mean of 108 and a sample standard deviation of 12. Test whether the sample has been drawn from the population.
Using α = .01, test to determine whether the type of treatment program entered is independent of an employee's status following treatment. If and only if it is appropriate to do so, offer an informal comment as to where the single largest change i..
test scores for a statistics class had a mean of 79 with a standard deviation of 4.5. test scores for a calculus class
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
the critical boundaries for a hypothesis test are z= +1.96 and -1.96. if the z score for the sample data is z= -1.90, what is the correct statistical decision?
How large of a sample should be studied if the standard deviation from a previous study was 26 cents and he wants his estimate to be accurate to within 15 cents?
The number of students that enroll in a psychology course is a poisson random variable with mean 100.the course incharge has decided that if the enrolling is 120 or more he will teach the course in two separate sections.
twenty-seven items are randomly selected from a population of 295 items. the sample mean is 35 and the sample standard
the chapin social insight test evaluates how accurately the subject appraises other people. in the reference
Is there sufficient evidence to conclude that a difference exists between the proportions of cats and dogs that sleep more than 10 hours per day?
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