Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg118121 Every 7th question starting with Q3
Chapter 3.1 Homework
Find (a) the mean, (b) the median, (c), the mode, and (d) the midrange for number 3.
3. The reported high temperatures in degrees Fahrenheit) for selected world cities on an
Octob
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg267268 #s13, 11, 14, 20, 26
Chapter 5.3 Homework
1. Which of the following are binomial experiments or can be reduced to binomial
experiments?
a. Yes
b. Yes
c. Yes
d. No
e. No
f. Yes
g. Yes
h. Yes
i. No
j. Yes
2. Compute the probability of X
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework Pg195199 #s 111, 19, 34, 40
Chapter 4.1 Homework
1. What is a probability experiment?
a. It is a chance process that leads to welldefined outcomes.
2. Define sample space.
a. It is the set of all possible outcomes of a probability experiment i
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg173175 #s 2, 4, 12, 16, 22
Chapter 3.4 Homework
2. The number of shark attacks and deaths over a recent 5year period is shown. Find the
mean, median, mode, midrange, variance, and standard deviation for the data. Which data
set is more variab
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg6162 #s 1, 13, 15
Chapter 2.2 Homework
1. For 108 randomly selected college applicants, the following frequency distribution for
entrance exam scores was obtained. Construct a histogram, frequency polygon, and ogive
for the data. (The data for
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework Pg137141 #s 2, 4, 9, 22, 30, 36, 41, 46
Chapter 3.2 Homework
3. Why might the range not be the best estimate of variability?
a. A very high data or a very low data value will influence the range.
4. What are the symbols used to represent the sam
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Chapter 62 Homework
2.
a.
b.
c.
Between $35,000 and $45,000 a year
= (4775035000)/5680 = 2.2447183098591549
z score = .9875 for 35000
(4775045000)/5680 = 0.4841549295774648
z score = .6844 for 45000
.9875.6844 = .3031
more than $40,000 a year
= (47750
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg8487 #s 1, 7, 10, 18
Chapter 2.3 Homework
1. Construct a vertical bar chart for the total number of hurricanes by month from 1851
to 2008.
7. The safe ty record of U.S. airlines for 10 years is shown. Construct a time series
graph for the data
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg258259 #s 118, 21, 26 30
Chapter 5.1 Homework
1. Define and give three examples of a random variable.
a. A random variable is a variable whose values are determined by chance.
Examples will vary.
2. Explain the difference between a discrete a
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg223235 Every 7th starting Q1; pg240241 #s1, 6, 13, 17 ; pg243245 #s 2, 10, 14,
17, 23
Chapter 4.4 and 4.5 Homework
1. How many 5digit zip codes are possible if digits can be repeated? If there cannot be
repetitions?
a. 10*10*10*10*10 = 100,
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg267268 #s15, 7, 11, 13, 19, 27, 29, 31, 33, 37, 40, 44, 49
Chapter 6.1 Homework
1. The characteristics of the normal distribution are:
a. Bellshaped
b. Symmetric about the mean.
c. Mean, median, and mode are equal.
d. Continuous
e. Never tou
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg204206#s 12, 14, 19, 24; pg220224 #s 1, 12, 24, 34, 49
Chapter 4.2 and 4.3 Homework
1. Define mutually exclusive events, and give an example of two events that are mutually
exclusive and two events that are not mutually exclusive.
a. Two eve
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework 1
Chapter 1 Homework
11. Data that can be classified according to color are measure on what scale?
a. Nominal  A
13. A variable that interferes with other variables in the study is called
a. A confounding variable  A
18. Three reasons why sampl
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg153155 #s 18, 12, 14, 21, 28, 30
Chapter 2.3 Homework
1. What is a z score?
a. It tells how many standard deviations the data value is above or below the mean.
2. Define percentile rank.
a. A percentile rank indicates the percentage of a data
Intro to Statistics (8e Elemetary Statistics: A Step by Step Approach book)
MA 151

Fall 2014
Homework pg4647 #2, 3, 5, 15
Chapter 2 Homework
2. Name the three types of frequency distributions, and explain when each should be used.
a. Categorical frequency distribution is used for data that can be placed in
specific categories, such as nominal o