Mean-variance and standard deviation
The following data lists the average monthly snowfall for January in 15 cities around US:
34 9 28 24 0 46 34 20
1 38 5 16 32 26 25
Find the mean, variance, and standard deviation. Please show all of your work.
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At normal atmospheric pressure a mixture of water and aniline is steam distilled, initially the temperature is 97.3C. At this temperature the partial pressure of water is 745mm Hg. Calculate the percentage by mass of aniline in distillate?
Determine coordinates of vertices of major axis? Find coordinates of vertices of minor axis? Find coordinates of one Foci? Determine the Eccentricity? 16x^2+25y^2=150y+175.
Given following frequency distribution, find out the mean, variance, and standard deviation. Please show all of your work.
Determine the numbers of grams of sodium hydrogen carbonate, baking soda, are needed to totally neutralize 1.00L of 6.00 M sulfuric acid that has been spilled on the floor?
Calculate this probability density for an electron in the 1s-, 2s-, and 3s- orbital of a hydrogenic atom. When an orbital other than s is considered then what happens to the probability density?
Rank the following data in increasing order and find out the positions and values of both the 22nd percentile and 65th percentile. Please show all of your work.
A sample of ammonia gas is totally decomposed to hydrogen and nitrogen gases over heated iron wool. Analyze the partial pressure of hydrogen and nitrogen gas when the total pressure is 866mmHg.
Determine the probability that the student will successfully earn no less than the needed minimum score of 70% on the exam based solely upon randomly guessing answer for each question?
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