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Jun 29th, 2015
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Syracuse University
Course: general
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This is a problem dealing with the normal distribution and we don’t have hard fast values for probabilities, but are given the standard deviation.

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Please note that Forms A & B were the same.1.Based on the summary data below (obtained from StatCrunch summary information on stream concentration data presented earlier this semester), what is ?ColumnnMeanVarianceStd. Dev.Std. Err.MedianRangeMinMaxQ1Q3concentration5058.54270.8469216.4574282.32743260.867.527.194.645.969.3 a. 806.41this answer is 49 times the standard deviationb. 114.04 made upc. 270.85this is the variance stated in the tabled. 271.59not sure, I think this was a made up numbere. 13,271.50We went over this in class. There is a difference between the variance and the variation of X. StatCrunch provides you with the sample variance, which is actually the squared variation of X (which is what is being asked for here), divided by n-1. You can calculation the value being requested here by substituting the values given and solving through algebra.2.Which of the following is an example of independent events? a. None of these answersb. (c) and (d)See discussion below for c and d.c. Sampling with replacementIf you are sampling with replacement, that means that the probability of an event occurring does not change from trial to trial and what happened on prior trials has NO IMPACT on the probability of a specific event.d. The results of successive outcomes when rolling a single die time after time. Much like c above, the probability of any specific number is unaffected by prior roles.e. Revealing a

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