Tests of goodness of fit and independence
MULTIPLE CHOICE
1. A population where each element of the population is assigned to one and only one of several classes
or categories is a
a. multinomial population
b. Poisson population
c. normal population
d. No
Chapter 4Introduction to Probability
When applicable, selected problems in each section will be done following the appropriate stepby-step procedures outlined in the corresponding sections of the chapter. Other problems will
provide key points and the ans
Chapter 2Graphs, Charts, and TablesDescribing Your Data
When applicable, the first few problems in each section will be done following the appropriate
step by step procedures outlined in the corresponding sections of the chapter. Following
problems will p
Chapter 5Discrete Probability Distributions
When applicable, selected problems in each section will be done following the appropriate stepby-step procedures outlined in the corresponding sections of the chapter. Other problems will
provide key points and
Chapter 9Introduction to Hypothesis Testing
When applicable, selected problems in each section will be done following the appropriate stepby-step procedures outlined in the corresponding sections of the chapter. Other problems will
provide key points and
QUESTION BANK MC 215
A consumer products company is considering introducing a new
product nationally. To help make the decision, it first conducts a test
market by selling the product for a few months in one city. This is an
example of:
a. Estimation
2. A
Midterm Preparation Problems
CASE # 1 HOX PLOT CASE from Lesson 2
CASE #2- Products are returned to stores for a variety reasons. A recent study showed that 60% are for
operational reasons, 30% for cosmetic reasons, a
MCQ
1. Which of the following Statements is true regarding a simple linear
regression model?
@ The proportion of variation that is unexplained is the correlation
coefficient
@ SSR must be greater than SSE if the coefficient of determination is larger
tha
Class 1 STATS
Descriptive Statistics:
o Procedures and techniques designed to describe data
Inferential Statistics
o Tools and techniques that help decision makers to draw inferences from a set of data
Estimation
Hypothesis Testing
Relative frequency
o
COMM 215: Business Statistics
Solution to Practice Problems 2
_
Sampling Distributions
1
240 250
260 250
a) P( x < 240) or P( x > 260) = P z <
+ P z >
7.5
7.5
20
20
P ( z < 5.96) + P ( z > 5.96) 0
z = 1.04,
b)
2
3
4
5
x 250
= 1.04, x = 257.8
7.5
= 5.5
Family Name
Name
ID
1st Individual Practice Assign Comm215 ( Chapters 1-4) - no mark.
- all questions must be done by hand and individually.
-For MCQs YOU MUST HIGHLIGHT or use dark COLOR to circle only
one ANSWER.
-Only show your work when it is required
COMM 215: BUSINESS STATISTICS
REVIEW PROBLEMS 2
_
Sampling Distributions
1. The size of servings of soft ice cream in a fast-food chain is monitored carefully so that the mean
serving is 250g, with a standard deviation of only 7.5g. Treat the weights as b
Interval estimation
MULTIPLE CHOICE
1. The absolute value of the difference between the point estimate and the population parameter it
estimates is
a. the standard error
b. the sampling error
c. precision
d. the error of confidence
ANS: B
PTS: 1
TOP: Inte