Chapter 1 Homework

Study Questions

Section 1.1
Displaying Distributions with Graphs

  1. If a study looks at the hair color, height and weight of unviversity students, what are the individuals, and what are the varibles?
  2. In the example of #1, which variables are categorical and which are quantitative?
  3. What is a distribution?
  4. What is the label of the y-axis of a Histogram?
  5. What are classes or "bins" used for in a Historgram?
  6. What do center, spread and shape describe?
  7. What is an outlier?
  8. If most of the scores are on the low end, is the distribution skewed left or right?
  9. Which is easier to do, a histogram or a stemplot?
  10. A Timeplot is commonly used to represent what kind of data?
  11. What is the difference between the Dow-Jones going up and the Dow-Jones having a positive trend?

Section 1.2
Describing Distributions with Numbers

  1. What is the median between the median and the maximum called?
  2. What statistics are used to make the "5 Number Summary"?
  3. What statistics can be used to measure center?
  4. What statistics can be used to measure spread?
  5. Which is more effected by an outlier, the mean or the median?
  6. Which is more effected by an oullier, the IQR or the standard deviation?

Exercises

Section 1.1

1.1
1.2
1.4
1.6 (p. 48)
1.8
1.7 (p. 55)
1.9 (p. 56)
1.13 (p. 64)
1.17 (p 65)
1.19 (p. 67)
1.20
1.21

Section 1.2

1.24 (p. 68)
1.27 (p. 74)
1.30 (p. 75)
1.31
1.33 (p. 82)
1.34 (p. 43)
1.39 (p. 89)
1.43 (p. 89)
1.47 (p. 97)

Chapter Review

1.61 (p. 106)
1.63 (p. 107)
1.67 (p. 109)
1.69 (p. 111)
106-108, 110-112,115

Terms

Individuals, Categorical and Quatitive variables, distribution, center, spread, normal distribution, geometric distribution, histogram, stem plots, time plot, box plot symetric skewed outlier center spread and shape of a distribution, 5 number summary, mean, standard deviation, median, Q1, Q3, IQR

Skills

Finding the mean, median, standard deviation, inner quartile range of a set of data on calculator or computer

Links