Analysis of Heart Rate For fun a medical school professor once made a class of med students jump up and down for 1 minute and then measure their heart rate. Below are the values that were recorded:

136 144 99 145 135 125 115 127 124 101 100 103 130 119 121 123 116 115 126 114 125 125 116 137 152

Using StatCrunch - report back to the class the mean, median, and std deviation for the data

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.