STAT 3090
Test 1 - Version A
Fall 2014
Students Printed Name: _
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this
exam. You are NOT allowed to use any textbook, notes, cellpho
Simple Linear Regression
The following data represent the total compensation for 10 randomly selected chief executive
officers (CEOs) and the companys stock performance in 2011. For the following analysis use
compensation as the explanatory (predictor) va
STAT 3090
Test 1 - Version A
Fall 2014
Students Printed Name: _ANSWER KEY_
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this
exam. You are NOT allowed to use any textbook, not
Formula Sheet STAT 3090 Exam 1
Descriptive Statistics:
Population Mean
Sample Mean
Range = Maximum Minimum
Interquartile Range =
(
)
Std. Dev.
(
Sample: Variance
(
)
Std. Dev.
Population: Variance
)
Group Sample Mean
(
)
Group Sample Variance
) ( (
(
)
Bo
Appendix A Table A
A Standard Normal Distribution
Numerical entries represent the probability that a standard normal random variable
is between - and z where z =
x
.
Area
z
z
0
z
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0.0002
0.0003
0.0003
0.0003
0.
STAT 3090
Test 2 - Version A
Fall 2014
Students Printed Name: _
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT
allowed to use any textbook, notes, cellpho
STAT 3090
Test 3 - Version A
Fall 2014
Students Printed Name: _
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT
allowed to use any textbook, notes, cellpho
STAT 3090
Test 2 - Version A
Fall 2014
Students Printed Name: _
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT
allowed to use any textbook, notes, cellpho
STAT 3090
Test 3 - Version A
Fall 2014
Students Printed Name: _
XID:_
Instructor: _
Section # :_
Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT
allowed to use any textbook, notes, cellpho
STAT 3090 Formula Sheet 3 HAWKES
Confidence Intervals:
( )
s
For () - x t
2 n
For (p) - p z
Sample Size:
n=
( )
z
2
2
2
(E)
2
Hypothesis Test about mean
x x x
=
s
sx
n
Degrees of freedom = n 1
Test Statistic: t
=
Hypothesis Test about proportion
STAT 3090 Formula Sheet 2 Hawkes
Discrete Probability Distributions:
= E ( x) = x p( x)
2 = E [( x ) 2 ] = ( x ) 2 p( x) = [ x 2 p( x)] 2
Poisson Distribution:
Binomial Distribution:
n
= p x (1 p ) n x
P( x)
x
n
n!
=
x x!(n x)!
=
= np
p( x) =
x e
Appendix A
D
Table D
Critical Values of t
Numerical entries represent the value of t such that the area to the right of the t is equal to .
Area to the Right of the Critical Value
Degrees
of
Freedom
t0.200
t0.100
t0.050
t0.025
t0.010
t0.005
1
1.376
3.078
haelli3090SonnnerH-2014
Exam 2
Name: at Y F _,._
MULTIPLE CI IDICE. Choose the one alternative that best completes the statement or answers the
question. Solve the problem. Place answer in provided space for given problem. Each MC problem is 3
pt
5.
D_1
MATH 3090 Summer 11 2014
Exam 2
Name:
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the
question. Solve the problem. Place answer in provided space for given problem. Each MC problem is 3
pts.
1) A package deli
(tnal
l.
Exorrri Sr vi er",
KuJ
Consider the following data:
x
p(x)
Step 1. Find the expected value E( X
/,t, F( )- Z x rcfw_f *
).
3
4 5 6 7
0.1 0.1 0.2 0.3 0.3
Round your answer to one decimal place.
2;cfw_0,t)-h
4i*.1t*c'il,2*bi 4.",g" :r'*"vi
Step 2.
Formula Sheet STAT 3090 Exam 1
Descriptive Statistics:
Population Mean
Sample Mean
Range = Maximum Minimum
Interquartile Range =
(
)
Std. Dev.
(
Sample: Variance
(
)
Std. Dev.
Population: Variance
)
Group Sample Mean
(
)
Group Sample Variance
) ( (
(
)
Bo
Hypothesis Testing
1. A soda bottling company produces 16oz bottles of grape soda. In order to test
whether the bottling machinery is working properly, a random sample of 10 soda
bottles of grape soda are weighed. Below are the weights (in oz):
15.68 16.0
Sampling Distributions
1. A variable of a population has a mean of 35 and a standard deviation of 42.
If the variable is normally distributed, give symbol and number of the sampling distribution
mean and sigma of the sample mean for samples of size n= 9.
Confidence Intervals and Sample Size Estimation
1. A Statistics class decided to study the proportion of purple candies in a random
sample of 2500 Skittles. After much time counting the class determined that in their
sample there were 507 were purple. a.
Calculator Tutorial TI 82/83/84
1. Entering Data
(You might need to turn the diagnostics ON to do certain calculations. Press the blue (or
yellow) 2ND button, press the white 0, scroll down to DiagnosticOn, press ENTER twice.)
This stays on until turned-o