Age Residual Plot
Temperature (F)
1000
500 , o
i , or
.3 U o 0 0
' 0 Q
g 0 50 100% o 159 q, 200 250
500 * 0
1000
Age
Temperature (F) Residual
Plot
200
7: 100 0 *
IE 0 o 0 * . * . '
E 400 0 26 I '40 r330 80
200 circumference (cm) Residual
Plot
How do you figure out what you need on the final for a certain
grade in the class?
Note: Only do this calculation once your final homework and project grade have been
entered into Blackboard!
Lets say your lowest test grade is a 65 and your Current Grade
Day
1/17
1/19
1/24
Topic
Reading
Review Syllabus
Developing a vocabulary for Statistics
Variable Types
Discrete vs continuous data
Bias
Chapter 8
Presenting quantitative data one variable
(histograms, dot diagrams, stem-and-leaf plots)
Measures of center
Data
Classifyin
g Data
Bias
Collecting
Data
Descriptive
(Summary)
Statistics
One
Variable
Inferential
Statistics
Two
Variables
Probability
Sampling
Distributions
Descriptive
(Summary)
Statistics
One
Variable
Two
Variables
Categorical
Quantitative
Categori
STAT 210
Test 2 Formula Sheet
th
Median Location
n 1
2
Sample Mean
X
Sample Variance
s2
Sample Standard Deviation
s=
Lower Fence
Q1 1.5(IQR)
Upper Fence
Q3 + 1.5(IQR)
observation
x
n
(x X) 2
n 1
(x X) 2
n 1
STAT 210
Test 3 Formula Sheet
Sxx =
x2
x 2
n
2
y
2
Syy= y
n
x y
Sxy = xy
n
Correlation coefficient:
Slope =
S xy
S xx
Coefficient of Determination:
r=
S xy
S xx S yy
Intercept = Y slope( X )
r2 =
S xy 2
S xx S yy
STAT 210
Test 5 Formula Sheet
Z-score transformation:
Mean of
p
Z=
:
Standard Deviation of
p
p
X
=
:
p
(1 )
n
Confidence interval for
p Z *
Sample size
n=
p(1 p)
n
2
Z*
(1 - )
m
Test statistic for
Z
p o
o (1 o )
n
X = + Z
STAT 210
Test 6 Formula Sheet
Z-score transformation:
Mean of
X
Z=
:
Standard Deviation of
X
X
X = + Z
X
=
:
X
Confidence interval for
Z*(
X
n
)
n
Sample size determination:
Z*
n
m
Test statistic for
2
Z=
X o
/ n
Confidence interval for
t*(
X
Test 5 Practice Test #3
1.
Consider the three statements below. Draw a circle around any (if any) and all that are valid statistical hypotheses.
H0:
p
= 0.73
H A:
H A:
0.44
X 98 .6
_
2.
Which of the following is the point estimate of the population prop
Test 3 Practice Test #1
During the week of October 2-8, 2011 the lawn area between Harris Hall and the Student Commons contains a display of
red flags. The Red Flag Campaign is a public awareness campaign designed to address dating violence and promote th
Test 2 Practice Test #2
One of the most popular activities for tourists visiting Hawaii is snorkeling, where it is possible to see an assortment of
fish, turtles, eels, octopi, and other sea creatures. A random sample of 24 tourists who visited Hawaii dur
Test 3 Practice Test #2
In the sport of basketball a player scores by shooting a ball through a basket 10 feet in the air, and the goal is to score
more points than your opponent. Five players on a team play at a time, and because of the running involved
Test 6 Practice Test #1
Lymphoma is a cancer in the lymphatic cells of the immune system. Typically, lymphomas present as a solid tumor of
lymphoid cells. Treatment might involve chemotherapy and in some cases radiotherapy and/or bone marrow
transplantati
Final Exam Practice Test #3
Questions 1 through 7 all deal with the following information.
It is of interest to estimate the mean number of classes that all STAT 210 students missed during the fall 2008 semester. A
sample of 50 STAT 210 students was selec
Test 7 Practice Test #3
_ 1.
Which of the following is the point estimate of the difference in population means
(A)
_ 2.
X
(B)
p
(C)
X1 X 2
(D) 0
1 2
?
(E) 1
You have as a goal to estimate the difference between two population means
. To do so you have
1
Test 2 Practice Test #3
1.
Identify which of the following choices is the appropriate description of the statistic listed. It is possible to use a
choice more than once.
(A)
(B)
(C)
(D)
A measure of center that is not resistant to outliers.
A measure of c
Test 7 Practice Test #1
_ 1.
_
Definition: the maximum probability of rejecting the null hypothesis when the null hypothesis is actually true
that a researcher is willing to risk is which of the following?
(A) Significance level
(B) Margin of error (C) Te
Test 5 Practice Test #2
1.
In the current chapter covering statistical inferences on proportions, all of the procedures we have discussed
(sampling distributions, confidence intervals and statistical tests) have involved two assumptions. What are those
tw
Test 4 Practice Test #2
1.
Suppose each of the following variables is known to have an approximate normal distribution. Which of these do
you feel will have a standard normal distribution?
(A) Grade on this test
(B) Weight of students taking this test
(C)
Test 6 Practice Test #3
_
1.
What is the point estimate of the population mean ?
(A) 0
(B) Z
(C)
(D) t
(E) s
X
2.
In the current chapter covering statistical inferences on means, all of the procedures we have discussed (sampling
distributions, confidence
Test 4 Practice Test #1
For questions 1 through 4, write the appropriate answer on the line.
_
1.
Z has a standard normal distribution. What is the probability that Z equals 1.57?
_
2.
What is the standard deviation of a standard normal distribution?
_
3.
Test 7 Practice Test #2
_ 1.
Which of the following is the point estimate of the difference in population means
(A)
_ 2.
3.
X
(B)
p
(C)
X1 X 2
(D) 0
1 2
?
(E) 1
Definition: the maximum probability of rejecting the null hypothesis when the null hypothesis
Test 3 Practice Test #3
For the period November 1, 2013 through February 21, 2014, of interest was to use the average daily low temperature in
degrees Fahrenheit in a city to predict the number of days children in that city missed from school due to weath
Test 6 Practice Test #2
1.
In the current chapter covering statistical inferences on means, all of the procedures we have discussed (sampling
distributions, confidence intervals and statistical tests) have involved two assumptions. What are those two
assu
Test 2 Practice Test #1
_
1.
To estimate the mean age of all students attending her university, a statistician selected a simple random
sample of 15 students. Prior to going on vacation, the statistician collected data for only 13 of the 15
students, and