Chapter 11: Onesample Test of Significance
11.1 The HypothesisTesting Process



We determine whether to reject or not to reject this initial hypothesis.
Hypothesis a tentative proposal or statement about a fact.
Needs to be backed up by proven stan
Solutions to Homework, Chapter 16 Section 1.
Shaded or LARGE: Discussed in Class
page 697, problems # 1, 4, 6
page 698, problem # 11
page 699, problems # 15 and 16
Chapter 16, page 697, #1
In a regression analysis the independent variable is used to ma
BUSI1450 Statistics
Fall 2015 Midterm 1
Condensed Solution
Please Note: this is a condensed solution. Below are just the final answers. The intent is that you take
some time to review your exam and retry questions you need to work on (remember, the final
BUSI 1450 Statistics (Fall 2015)
1. D
2. B
3. C
4. D
5. B
6. D
7. A
8. E
9. D
10. D
11. B
12. E
13. B
14. A
15. E
16. A
17. C
18. A
19. B
20. A
Assignment #2 SOLUTION
BUSI 1450 Statistics (Fall 2015)
1. D
2. A
3. D
4. C
5. C
6. B
7. D
8. D
9. C
10. E
11. B
12. B
13. B
14. D
15. D
16. A
17. B
18. B
19. E
20. C
Assignment #4 SOLUTION
BUSI 1450 Statistics (Fall 2015)
1. B
2. D
3. C
4. A
5. B
6. D
7. D
8. F
9. E
10. B
11. C
12. A
13. C
14. D
15. F
16. B
17. A
18. B
19. B
20. A
21. E
22. B
23. D
24. A
25. D
Assignment #3 SOLUTION
BUSI 1450 Statistics (Fall 2015) Assignment #4 Question & Instructions
DUE: Friday, November 6, 2015 BEFORE Midnight (AKA 11:59pm)
Late submissions will NOT be accepted.
This is an INDIVIDUAL assignment. Do NOT copy, send/transmit or share files with
othe
BUSI 1450 Statistics (Fall 2015)
Assignment #2 Question & Instructions
DUE: Thursday, October 1, 2015 BEFORE Midnight (AKA 11:59pm)
Late submissions will NOT be accepted.
This is an INDIVIDUAL assignment. Do NOT copy, send/transmit or share files with oth
BUSI 1450 Statistics (Fall 2015)
1. A
2. D
3. C
4. E
5. A
6. B
7. A
8. C
9. E
10. D
11. C
12. E
13. A
14. B
15. A
16. A
17. B
18. C
19. B
20. C
Assignment #1 SOLUTION
BUSI1450 Statistics
Fall 2015 Midterm 1
Condensed Solution
Please Note: this is a condensed solution. Below are just the final answers. The intent is that you take
some time to review your exam and retry questions you need to work on (remember, the final
BUSI1450 Statistics
Fall 2015 Midterm 1
Condensed Solution
Please Note: this is a condensed solution. Below are just the final answers. The intent is that you take
some time to review your exam and retry questions you need to work on (remember, the final
BUSI1450 Statistics
Fall 2015 Midterm 1
Condensed Solution
Please Note: this is a condensed solution. Below are just the final answers. The intent is that you take
some time to review your exam and retry questions you need to work on (remember, the final
aChapter 12: Two Sample Tests of Significance
12.1 Inference for Two Samples

Two categories of procedures:
o Independent Samples
o Dependent Samples
Independent Samples

Samples are independent if the selection of elements for one sample is not influe
Chapter 10: Estimates and Confidence Intervals
10.1 Point Estimates and Interval Estimates

Estimation a process of obtaining a single numerical value, or a set of values, intended to approximate the
actual value of a parameter in the population.
Point e
Chapter 5: Measures of Spread and Shape
5.1 The Range, Variance, and Standard Deviation

Measures of spread = Measures of Variation = Measures of dispersion a single number that describes the
degree of variety among the values of a distribution.
Range Di
Statistic Notes: Chapter 1
Chapter 1: Introduction to Statistical Data
1.1 Why Study Statistics?
 Statistics can be defined as the art of collecting, classifying, interpreting, reporting numerical information
related to a particular subject.
 Population
Chapter 4: Measures of Location
4.1 Arithmetic Mean


Arithmetic mean Commonly called an average.
Is one indicator of the location of a data set; in particular, it is a measure of centre.
Add all of the values in the data set and then divided by the n
o


The mathematical differences between rank numbers have no interpretation;
only the relative order of the numbers convey information.
IntervalLevel Management These numbers can be compared meaningfully to distinguish higher from lower
ranks.
o Equal
Solutions to Homework on Chapter 02
page 57, problems # 5, 6, 10
Boxed&Underlined: Discuss in class
page 58, problems # 11, 12
Chapter 02, page 57, #5
In general there are six main steps to order a research process. Initially the researcher has to
defin
Solutions to Homework on Chapter 15 (section 15.1 only)
Shaded or Larger: Discuss in Class
page 647, problems # 2, 3, 5, 6, 11, 12, 14 and 15
Chapter 15, page 647, #2
The symbol for the sample coefficient of correlation is r.
Chapter 15, page 647, #3
Pos
Solutions to Homework on Chapter 10
page 433, problems # 26, 28, 30, 32
shaded or
Large: discuss in class
Chapter 10, page 433, #26
_Given: For the population (lengths of jail sentences):
= 9.75;
For the sample: n = 40;
x
= 4.05
a) _the standard error (
Solutions to Homework on Chapter 08 (Section 2; not covering sections 8.3 & 8.4 )
Shaded
or LargeDiscuss in Class
page 363, problems # 17, 27, 28
page 364, problems # 30, 31
For solving problems to assess normality, review the Slides for
section 8.2, post
Solutions to Homework on Section 10.1
shaded or
Large: discuss in class
page 432, problems # 10, 11, 12
What kinds of estimates are the following:
Chapter 10, page 432, #10
_The population estimate of 5.2 million seals is a point
estimate.
Chapter 10, pa
Solutions to Homework on Chapter 09 (Sections 2 & 3;
page 398, problems # 26, 27, 28, 30
page 399, problems # 37, 38, 39, 41, 43
Shaded or
Section 9.4 will not be formally covered)
Large: Discuss in Class
Chapter 09, page 398, #26
_Given:
For lengths of
Solutions to HW on Chaper 09 (Section 1)
Shaded or
Large: Discuss in Class
page 396, problems # 1, 2, 5, 10
page 397, problems # 11, 13, 14
Chapter 09, page 396, #1
The term error in the expression standard error of the mean does not imply that a mistak
Solutions to Exercises on Chpt. 06 (sections 1&2)
Shaded or Large: Discussed in class
page 257, problem # 4
page 258, problems # 9, 10, 11, 13, 14
page 260, problems # 22, 24, 25
Chapter 06, page 257, #4
a) The sample space consists of the genders of all
Solutions to Homework on Chpt. 8, Section 8.1
page 361, problems # 1, 2, 10
Shaded or Large: Discuss in Class
page 362, problems # 12a, b, c, 13, 14, 16
For solving problems of a normal distribution with the computer see In Brief 8.1(a) on pages
329/330
Question #1
Probability of winning sandwich = 0.1
Probability of winning a drink = 0.05
a) Probability of winning a sandwich and drink = 0.1 X 0.05 = 0.005
b) Probability of winning sandwich or drink = 0.1 + 0.05 0.1 X 0.5 = 0.145
Question #2
Year
Enrolme
CHAPTER 3.2
Graphing Data
Single Variable
1) Qualitative Data (& discrete variables)
 Bar chart
 Frequency Polygon
 Pie Chart
 Pareto Chart
2) Quantitative Data
 Histogram
Multiple Variables (displays of association)
 Scatter Diagram
 Contingency T
CHAPTER 6A
(See Dr. Goodmans Slides 18)
Types of Probability
Classical:
a priori, based on definitions
(need not perform actual experiment)
Empirical:
Based on actual observations
(must observe results of an experiment)
Subjective:
based on judgement of
Chapter 5
Measures of Spread and Shape
Range
Standard Deviation
Interquartile Range
Empirical Rule
Chebyshevs Rule
Coefficient of Variation
Skewness
Range: equals the maximum value minimum value
Standard Deviation
See Chapter 5 PowerPoint slide #113
Para
CHAPTER 9
Sampling Distributions
Recall that in Chapter 8 we determined P(x<a) when a
single value, x, was randomly selected from a normal
distribution having a known mean () and standard
deviation ().
a
x
To determine the answer we found we could use any