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The energy flux associated with solar radiation incident on the outer surface of the earth's atmosphere has been accurately measured and is known to be 1353 W/m2. The diameters of the sun and earth are 1.39 × 109 and 1.29 × 107 m, respectively, and the distance between the sun and the earth is 1.5 × 1011 m.
(a) What is the emissive power of the sun?
(b) Approximating the sun's surface as black, what is its temperature?
(c) At what wavelength is the spectral emissive power of the sun a maximum?
(d) Assuming the earth's surface to be black and the sun to be the only source of energy for the earth, estimate the earth's surface temperature.
As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At = .05, what is the test value?
A 95% confidence interval from an SRS of 30 observations. (a) A 90% confidence interval based on n = 12 observations. S7.1
Use a 5% significance level to test the claim that there appears to be a difference in the effectiveness of the two diets.
a deck of ordinary cards is shu?ed and 13 cards are dealt. what is the probability that the last card dealt is an
99.7% of the final game scores fall within what range, what percent of all final game scores did the pistons have more than 106 points?
Why is it important to study ethics in statistics? Have you seen statistics misused? Without naming specific companies or people, can you provide examples?
GloFish, Inc. has genetically engineered a species of fish that glows in normal lighting conditions.
twenty percent of the employees of a large company are female. use the normal approximation of the binomial
You are estimating the cost of engine overhauls a sample of 99 repairs showed an average overhaul of 285 hours with a standard deviation of 60 hours. Calculate a 95% confidence interval for the average overhaul
What sample size is need if the agency wants to be 90% confidence of being correct to within +/- 5 minutes? if 90% is desired, how many listeners need to be selected?
An elevator starts at the basement with 8 people (not including the elevator operator) and discharges them all by the time it reaches the top floor, number 6.
Purpose: To gain an understanding of how ethics policies can be adequate substitutes for governmental regulation.
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