Statistics 2103 Sec701 - Business Statistics
CALENDAR This is a tentative calendar. If time permits, we may cover more topics. The chapters listed are from your textbook. DATES Jan 19 Jan 26 TOPICS Introduction, Types of data, Collecting data CHAPTERS Cha
Stat2103 Practice Test Ch5
Department of Statistics
Temple University
October 19, 2011
Name:
1
1. (a) Find z/2 , when = 0.05.
(b) Find z/2 , when = 0.02.
(c) Find z/2 , when = 0.1.
2. What is the condence level of the following condence interval for , ass
Stat2103 Section007 Exam4
Department of Statistics
Temple University
December 6, 2011
Name:
1
1. A new apparatus has been devised to replace the needle in administering vaccines. The
apparatus, which is connected to a large supply of vaccine, can be set t
Answer Key
Testname: CH3
1) A
2) B
3) C
4) P(blue) =
6
= 6 = 0.24
12 + 6 + 4 + 3 25
5) P(A) = .3; P(B) = .4
6) A
7) B
8) B
9) a. cfw_HHH, HHT, HTH, THH, HTT, THT, TTH, TTT
b. Each sample point is assigned the probability 1 .
8
c.
P(A) = P(cfw_HHH) = 1
8
d
Practice Test (Chapter 2)
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
1) What number is missing from the table?
Year in
College
Freshman
Sophomore
Junior
Senior
Frequency
Practice Test 1 (Chapter 1)
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
1) A recent report stated "Based on a sample of 220 truck drivers, there is evidence to indicate th
Answer Key
Testname: CH2
1) A
2)
Color Frequency
Green
3
Blue
7
Brown
5
Orange
2
Red
3
3) D
4) C
5) a.
Total Medals
Frequency
1-5
5
6-10
2
11-15
5
16-20
1
21-25
4
26-30
1
b.
6) D
7) B
8) D
9) D
10) A
11) The mean is the sum of the numbers divided by 18:
1
Simple and M ultiple Regression 10.1 and 10.2 Probabilistic Model The equation of a straight line model is represented as:
are the unknown error components that represent the deviations of the observed value of y from the fitted value of y. They are the u
Practice Test (Chapter 3)
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
1) Which of the following assignments of probabilities to the sample points A, B, and C is valid if
A
Stat2103 Practice Test Ch4(II)
Department of Statistics
Temple University
October 22, 2011
Name:
1
1. Suppose 4% of the items produced by a factory are defective. A shipment of 10,000 items
is sent to a warehouse. Let X denote the number of defective item
Stat2103 Practice Test (Ch4)
Department of Statistics
Temple University
September 28, 2011
Name:
1
1. Consider the given discrete probability distribution. Find the following:
x
P (x)
0
1
2
3
4
5
0.30 0.25 0.20 0.15 0.05 0.05
(a) P (X 4)
(b) P (X < 4)
(c)
Stat2103 Practice Test Section 6.2-6.3
Department of Statistics
Temple University
November 7, 2011
Name:
1
1. State University uses thousands of uorescent light bulbs each year. The brand of bulb
it currently uses has a mean life of 800 hours. A competito
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Exam
Name_
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Solve the problem.
1) A method currently used by doctors to screen women for possible breast cancer fails to
detect cancer in 18% of women who ac
Practice Test 6.4-6.5
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
1) A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas.
Th
Stat 2103
Prof Hopson
Exam 2 Please show ALL work for credit.
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NO WORK = NO CREDIT
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Exercise 1.6 Extra Credit
What kind of sample is used in each case: Simple random, systematic, cluster, stratified,
convenience, or expert?
1. In order to test a new chocolate bar, Hershey asked employees to have their children try
it. Simple Random
2. Co
Probability Formula Sheet
Probability Formulas
Conditional Probability
P( A | B)
P ( A _ and _ B )
P(B)
Independent Events
P ( A | B ) P ( A)
Complement Rule
P ( A ) 1 P ( A)
Multiplication Rule for Independent Events
P ( A _ and _ B ) P ( A | B ) P ( B
on 1 = proportion of items in the success category. f items in the failure category.
e of n1 items, let X 1 be the numberSTAT 2103 Class success category. = , of items from the Topics
on 2= proportion of items in the success category. f items in the failu
STAT 2103 Class Topics Chapter 4 A random variable is a function or rule that assigns a number to each outcome of an experiment. Alternatively, the value of a random variable is a numerical event. Two types of random variables: Discrete Random Variable on
STAT 2103 Class Topics Chapter 1 What is Statistics? Statistics is the science of conducting studies to collect, organize and summarize data and to draw conclusions from the data. Definitions: An experimental unit is an object (e.g., person, thing, transa
P-values with the Ti83/Ti84
Note: The majority of the commands used in this handout can be found under the DISTR menu which you can access by pressing [2nd] [VARS]. You should see the following:
NOTE: The calculator does not have a key for infinity (). In
Which inference?
Which type of inference procedure is called for in each? One Proportion, Two sample means, Two proportions, Matched pairs, One mean, Regression, Will you use z , t? How many degrees of freedom (if appropriate)? 2. Cheating. A teacher bel
Sam Tamika Brian Mike
85 94 78 87
94 87 79 88
Column1
Mean Standard Error Median Mode Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Sum Count
-1 3.27 -1 -1 6.53 42.67 1.5 0 16 -9 7 -4 4
-9 7 -1 -1