Chapter 3
3.2
S = sample space
The subsets of the sample space are called events. The events consisting of the single elements of the
sample space are called the simple events.
If an element of an event is the outcome of the experiment, then the event is
Exam 2 Practice Problems for Math 1140
The formula sheet and tables for Exam 2 are at the end.
Urn
We have an urn which contains 6 green balls and 14 blue balls. Suppose we select a ball from the urn,
record its color and return the ball to the urn. This
Exam 2 Practice Problems for Math 1140
The formula sheet and tables for Exam 2 are at the end.
Urn
We have an urn which contains 6 green balls and 14 blue balls. Suppose we select a ball from the urn,
record its color and return the ball to the urn. This
Exam 2 Math 1140 9/9/2014
Name_
Section_ Show all relevant work. There are 10 problems.
Round your answers to 4 decimal places, unless the answer naturally rounds off to fewer than four.
Please do not detach any pages from the exam. Clearly select the mul
The Key is at the end. Also, the formulas and the tables are located at the end.
Exam 3 Coverage: 5.1,5.2, 5.3, 5.4, 6.1, 6.2, 6.3, 6.4, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6
Review
1) Calculate z0.04. That is, compute the value so the area to the right of the val
Exam 2 Math 1140 9/9/2014
Name_
Section_ Show all relevant work. There are 10 problems.
Round your answers to 4 decimal places, unless the answer naturally rounds off to fewer than four.
Please do not detach any pages from the exam. Clearly select the mul
Ewoks and Wookies
You measure the height of n1=800 Ewoks, a species of teddy-bear-like hunter-gatherers that inhabit
the forest moon of Endor. The average height you measure is = , and the standard deviation
of the measurements is = . .
Independently of t
Review for Exam 1
Math 1140
1) We have a class of 90 students. In how many ways may we select 4 students from the class? Assume the
order doesnt matter.
Answer: ( )
2) Workers a given training sessions until the workers demonstrate mastery of a
certain pr
Chapter 12: 1-5
The multiple linear regression model is
y 0 1x1 2 x2 3 x3 kk
x
k
.
Here y denotes the dependent or response variable, x1, x2, xp denote the independent or
explanatory variables and is a random variable.
Observations: Each observation cons
Chapter 8: Comparing Two Population Mean Values (Independent Samples)
We have two populations, Pop1 and Pop2. We have random variables y1 and y2 defined on Pop1 and
Pop2, respectively. The mean value of y1 is denoted 1 and the mean value of y2 will be den
Chapter 5
5.1, 5.2 and 5.3: The Central Limit Theorem For x
Suppose we have a population consisting of 3 students cfw_a, b, c. Suppose we
have given the students a 6 pt quiz and we define an associated RV x = quiz
score. Suppose the quiz scores are as ind
6.1,6.2 Part 1: Critical Values
Definition 1:For any real number such that 0 1, z/2 is the positive number so that the area to
the right of z/2 and beneath the standard normal curve is /2.
Area = /2
0.5
0
-6
0
6
z/2
Definition 2: For any real number such
Chapter 7
7.1 Hypothesis Testing
In each case describe the null hypothesis and describe (in words) a Type I error. Describe the
meaning of establishing a 5% level of significance.
1) A manager of a store claims that the average purchase by a customer is a
Chapter 2
2.1 Qualitative Data
An instructor has given an exam to 30 students. The letter grades of the exams are recorded below.
X = grade= A, B, A, B, C, C, C, C, D, F, D, F, A, A, B, D, A, C, C, C, B, B, B, B, D, C, C, C, C, F
a) Give the frequency dis
Toss a fair coin 20 times, what is the prob that there are at most 12 heads?
x: number of heads
n: 20
0.5
0.4
0.3
0 9.53674E-007 3.65616E-005 0.00079792
1 2.00272E-005 0.0005240494 0.00763726
2 0.0002012253 0.0036114721 0.03548313
3 0.001288414 0.01596116