What is the period during the cardiac cycle when the valves leading to and from the ventricles are completely closed and blood volume in the ventricles remains constant as the walls contract?

Isovolumetric contraction period.

part a: list two pieces of information that are provided by the graph and one piece of information that is not provided by the graph. (4 points)

two pieces of information that are provided by the graph:

the lower quartile (q1) = 37.5

the upper quartile (q3) = 60

one piece of information that is not provided by the graph:

the median is the middle value of the data set = 50

part b: calculate the interquartile range of the data, and explain in a sentence or two what it represents. (4 points)

interquartile range of the data = q3 - q1 = 60 -37.5 = 22.5

interquartile range is the distance between the first quartile and the third quartile. it is the amount of spread in the middle 50 percent of a data-set

part c: explain what affect, if any, there will be if an outlier is present. (2 points)

in this case, 95 is far away from q3 (60) so 95 is an outlier. it will effect the mean and median of the data.

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