need help on this stat please:

We revisit the data given for tips for a pizza girl, given in Example 1.

a).Use technology to find the five number summary.

b).What is the range?

What is the IQR?

If one of the pizza delivery customers had given a $20 tip, which measure of spread would the large tip have a greater effect on:the range or the IQR?

A score of 400 on the SAT Mathematics General Test is at the 16^th percentile for all 2012 college-bound seniors taking the SAT.Clearly explain in terms of SAT scores what it means to be "at the 16^th percentile".

1.A histogram of heights of 355 students is shown on the reverse.Use this graph to give a rough estimate of the five number summary of the heights in this sample.

2.For each five number summary below, indicate whether the data appear to be symmetric, skewed to the right, or skewed to the left.

a).(10, 57, 85, 88, 93)

b).(200, 300, 400, 500, 600)

c).(5, 30, 40, 50, 75)

d).(5, 7, 8, 15, 42)

e).(100, 430, 600, 620, 650)