Statistics Exam 3 Study Guide
T-distribution:
o Center of zero
o Calculate the t-value using the degrees of freedom and % CIs
Hypothesis Tests for a Single Population Mean:
o Null Hypothesis:
= 0
0 is a specified value
o Alternative Hypothesis:
< 0
>
Normal Distribution
1.
Find the area under the standard normal curve to the left of
(a)
(c)
2.
z = 1.03
z = -1.35
z = 0.83
(b)
z = 2.83
(c)
z = -1.23
Find the area under the standard normal curve over the interval
(a)
(b)
(c)
4.
(b)
(d)
Find the area unde
Stats Final Exam Review:
REMEMBER TO MULTIPLY BY 2 IN TWO-TAIL TESTS
o Even when the Z-Score is very large & p-value < 0.0005
Confidence Interval/Levels:
o The confidence level (ie. 95%) represents the percentage of possible
samples for which the resultin
Alyssa Turner
Spring 2015
February 13, 2015
Statistics Exam 1 Study Guide
Introduction:
o Unit: 1 person or object that is polled
o Population of Units: complete collection of units about which
information is sought
Population: the inferred responses of
Statistics Exam 2 Study Guide:
Sampling Distributions:
o Simple Random Distribution: every sample size n has the same
chance of being selected
Sample Mean might vary from sample to sample
o Sampling Distribution: the probability distribution for the valu
Graphical Descriptive Statistics
1. The frequency table below gives a summary of the results from a recent Nielson survey that
asked 268 people their primary reason for shopping for holiday gifts on-line.
Relative
Frequency Frequency Percentage
Comparison
Introduction
1. The Environmental Protection Agency (EPA) uses a few new automobiles of each model
every year to collect data on gasoline mileage performance. For the 2014 Honda Accord 4cylinder model, they selected a sample of 16 cars and determined thei
Numerical Descriptive Statistics
1. Calculate the mean and median for each of the following data sets.
(a) 4, 7, 3, 6, 5
(b) 24, 28, 36, 30, 24, 29
(c) -2, 1, -1, 0, 3, -2, 1
2. For the data set: 9, 4, 5
(a) Calculate the deviations (x - x) and check to s
Graphical Descriptive Statistics
1. The frequency table below gives a summary of the results from a recent Nielson survey that
asked 268 people their primary reason for shopping for holiday gifts on-line.
Relative
Frequency Frequency Percentage
Comparison
Stats Exam 4 Study Guide:
Correlation Analysis:
o Strong Correlation data points form a line; p is close to 1 or -1
o Weak Correlation scattered data points; p is close to 0
Rho (p): represents the linear relationship (-1 1)
If rho = 0, then there is NO
Introduction
1.
A scientist testifying before a congressional hearing on the effects of estrogenic
pesticides told every man in the room that he is half the man his grandfather
was. The scientist was dramatizing a report on worldwide studies involving
14,
Normal Distribution
1.
Find the area under the standard normal curve to the left of
(a)
(c)
z = 0.83
z = -1.03
2.
Find the area under the standard normal curve to the right of
(a)
z = 0.83
3.
Find the area under the standard normal curve over the interval
Numerical Descriptive Statistics
1.
Calculate the mean and median for each of the following data sets.
(a)
(b)
(c)
2.
For the data set: 9, 4, 5
(a)
(b)
3.
4, 7, 3, 6, 5
24, 28, 36, 30, 24, 29
-2, 1, -1, 0, 3, -2, 1
Calculate the deviations (x - x) and che
Probability
1.
Someone claims to be able to taste the difference among bottled, tap, and
canned draft beer of the same brand. A glass of each is poured and given to the
subject in an unknown order. The subject is asked to identify the contents of
each gla
Random Variables
1.
Identify each of the following as a discrete or continuous random variable.
(a)
(b)
(c)
(d)
(e)
(f)
2.
Two of the integers cfw_2, 4, 6, 7, 8 are chosen at random. Let X represent the
difference of the smaller from the larger number.
(a
The Chi Square Test
A statistical method used to determine
goodness of fit
Goodness of fit refers to how close the observed
data are to those predicted from a hypothesis
Note:
The chi square test does not prove that a
hypothesis is correct
It evaluat
Exam Topics Exam I
5pm in P&As 174 on Feb 27th
NO PHONES OR EMAIL DEVICES IN TEST ROOM
NO OPEN BOOK .
EXIT THROUGH THE FRONT DOOR
No classes are cancelled due to the test.
Bring Calculator, no notes allowed, formula sheets will be given out at the test. T
EXST 301
Introductory Statistics
Spring 2012
Instructor: June Luo
Office: O-15 Martin
Phone: 656-5768
Office Hrs: E-mail me to make an appointment
E-mail address: [email protected]
Class:
EX ST 301
EX ST 301
Section 003
Section 004
MW 11:15-12:05 Kinard 30
Random Variables
1.
Identify each of the following as a discrete or continuous random variable.
(a)
(b)
(c)
(d)
(e)
(f)
2.
Two of the integers cfw_2, 4, 6, 7, 8 are chosen at random without replacement. Let
X represent the difference of the smaller from t