Refer to the following diagram Solutiona this is a piston gr

Solution

a) this is a piston graph

b) median is the mid value of the graph = 60

1st quartile = For a set of data, a number for which 25% of the data is less than that number. The first quartile is the same as the median of the data which are less than the overall median. Same as the 25th percentile.

will be = 40

3rd quartile  a number for which 75% of the data is less than that number = 75

c)In positively skewed distributions, the mean is usually greater than the median, which is always greater than the mode = so here is mean not greater than the median hence not skewed

d) outlines value will be 30,40,50,60,70,80,90

e) no we cannot determine the number of observations in this.