Homework Chapter 1

Section 1.4

Question 17-20

data n
0 5
1 9
2 6

17

  • Greater than 1 (just 2s): 6
  • Total observations: 20
  • Answer: 0.3

18

  • 1 - answer from 17
  • Answer: 0.7

19

  • Answer: 0.3

20

It doesn’t look like there are any outliers - it is hard to detect them with just three different values. The distribution is relatively symmetric.

Questions 21-22

I used these breaks 55, 63, 71, 79, 87, 95

Q21

The shape of the scores seem pretty flat - with a small peak at > 90.

Q22

There seems to be an even distribution of student scores - meaning there aren’t students who do really well or really poorly.

Question 26

a

b

[1] 0.54

c

[1] 0.94

Question 33

a

b

Histogram is left skewed

c

Maybe because as you move further away you get a chance to see more starbucks - there are only a few that are close to you but once you move out you can get a large swath of them.