More Practice Problems: 1-Way ANOVA

November 24, 2008 by  
Filed under ANOVA, Practice Problems

Item 3
Which is the best coffee (most cups ordered):
Blue-Label   Green-Label     Red-Label
13              1              5
4              1              2
10              2              2
13              2              2
11              2              6
3              4              4
SS df ms
Between 
Within 
Total 
F =
Critical value of F =
Item 4
Which is candle lasts more days?
Non-Sented     Low-Sented   High-Sented
3                 5                 8
9                 1                 2
5                 2                 6
11                 5                 4
SS df ms
Between
Within
Total
F =
Critical value of F =  .
Which is candle lasts more days?

Practice Problems: 1-Way ANOVA

November 24, 2008 by  
Filed under ANOVA, Practice Problems

Item 1

Year in school and car accidents.

10th     11th    12th
2        13        4
9        17        8
3        14        2
1          9        1
7         1         4

 

SS     df    ms

Between     ____  ___   ____

Within        ____  ___   ____

Total          ____  ___   ____

F =

Which grade has the most car accidents:

 

 

Item 2

House color and people’s stay (in years).

Blue    Green   Peach
8        11         4
7         9          8
3         7          9
1       18          2
9       12          4

 

SS     df    ms

Between     ____  ___   ____

Within        ____  ___   ____

Total          ____  ___   ____

F =

Which color of house is lived in the longest (in years)?

Answers

 

NOW YOU CHOOSE
Day9: 1-Way ANOVA
Bit More About 1-Way ANOVA
Even More About 1-Way ANOVA
Calculate 1-Way ANOVA
Practice Problems
More Practice Problems
Word Problems
Sim1 Sim2 Sim3
Sim4 Sim5 Sim6
Sim7 Sim8 Sim9
Vocabulary
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Quiz 9
Summary

More Practice Problems: Regression

November 7, 2008 by  
Filed under Practice Problems, Regression

Item 6

If there are 7 professors, how many classes will be taught:

Professors Classes
1                     3
4                     8
12                   13
8                     2
7                     8
7                     9

a =
b =  
r =  
see =
If X (professors) is 7, Y (classes) will be =

Item 7

If there are 150 candles, how many flowers will a wedding have:

Candles Flowers
22                 2
8                 4
6                 9
3               11
12                 4
1                 6
16               19

a =
b =
How accurate is your prediction? (see) =
If X is 150 (candles), Y (flowers) will be =

Item 8

How much will tuition (in thousands) be in 1997:

Year Tuition
1990             1
1991             3
1992             9
1993           12
1994           16

a =  
b =
[Hint: use the last digit of the year or convert Years to your own integers]
If X (year) is 7, Y (tuition) will be =

 

Answers

 

More Practice Problems: Correlation

November 5, 2008 by  
Filed under Correlation, Practice Problems

Item 5

How much variance is NOT accounted for between these two variables:

Strength Anxiety
2                     3
9                     7
3                     4
1                     1
7                   12

SSx =     _____
SSy =     _____
SSxy =   _____
r =         _____
r2 =        _____
1 – r2 = _____

Item 6

Is there a significant relationship between the number of petals on a flower and how much the elephant plant weighs:

Petals Weight
18                     1
15                     7
8                   11
6                     6
4                   18
2                   22

SSx =     _____
SSy =     _____
SSxy =   _____
r =         _____
r2 =        _____

Item 7

What percent of variance do love and peace have in common:

Love Peace
12                     1
22                     3
8                     0
19                     1
2                   11
9                     4

7                     5

SSx =     _____
SSy =     _____
SSxy =   _____
r =         _____
r2 =        _____

 

Answers

 

NOW YOU CHOOSE:
Day 5: Correlation
Bit More About Correlation
Even More About Correlation
Calculate Correlation
Practice Problems
More Practice Problems
Word Problems
Sim1 Sim2 Sim3
Sim4 Sim5 Sim6
Sim7 Sim8 Sim9
Basic Facts About Correlation
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Formulas
Quiz 5
Summary

More Practice Problems: t-Test

November 4, 2008 by  
Filed under Practice Problems, t-test

#4
Which students do significantly better in reading (Words per minute):
High Sch College
7                     5
4                     3
6                     1
6                   11
3                     8
2                     8
1                   13
6                     9
t = 1.77
Which students do significantly better in reading:
#5
Which cars are the safest (accidents):
Foreign Domestic
16             1
14             3
12             9
18           11
12             6
7             1
t = 3.45
Which cars are the safest (accidents):
#6
Which dogs are the meanest (bites per minute):
Big Little
1                   6
4                   3
3                   9
8                 11
2                 16
7                 11
5                 22
3                   7
t = 2.37
Which dogs are the meanest (bites per minute):

Practice Problems: t-Test

November 4, 2008 by  
Filed under Practice Problems, t-test

#1

Calculate am independent t-test for the following data:

X1 X2
6             12
4               4
2               7
3             10
9               5
6               8
5               3

Mean of group 1 _____

Mean of group 2 _____

Difference between the means _____

SS of group 1 _____

SS of group 2 _____

n(n-1) _____

t = _____

How many degrees of freedom (df) at in this study_____

What is the critical value for t (2 tailed, .05 alpha) _____

Is the t significant _____

#2

Calculate am independent t-test for the following data:

X1 X2
15          3
11          5
8          4
12          2
7          6

Mean of group 1 _____

Mean of group 2 _____

SS of X1 _____

SS of X2 _____

t = _____

 

 

#3

Calculate am independen t-test for the following data:

X1 X2
6           3
7           5
6           3
8           2
4           7
11           4

t = _____

How many degrees of freedom (df) at in this study ____

What is the critical value for t (2 tailed, .05 alpha) _____

Is the t significant? _____

 

Answers

 

NOW YOU CHOOSE:
Day 8: Student’s t-Test
Bit More About t-Test
Even More About t-Test
How to Calculate t-Test
Practice Problems
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Sim1
Sim2 Sim3
Sim4 Sim5 Sim6
S
im7 Sim8 Sim9
Basic Facts About t-Test

Vocabulary
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Quiz 8
Summary

More Practice Problems: ANOR

November 4, 2008 by  
Filed under ANOR, Practice Problems

Item 5
To discover if education has a significant impact on people’s income, use the following information, perform an Analysis of Regression and complete the following summary table:
r= .73
SSx = 98
SSy = 44
N = 13
SS df ms
Regression      ____     ____    ____
Error               ____     ____     ____
TOTAL             ____     ____
What is the F for this test: ___________
What is the critical value for F: ________
Is the F significant? _________
Item 6
To discover if music lessons have a significant impact on people’s intelligence, use the following information, perform an Analysis of Regression and complete the following summary table:
r= – .56
SSx = 111.3
SSy = 87.8
N = 16
SS df ms
Regression         ____     ____     ____
Error                   ____     ____     ____
TOTAL                 ____    ____
What is the F for this test: ___________
What is the critical value for F: ________
Is the F significant? _________

Practice Problems: ANOR

November 4, 2008 by  
Filed under ANOR, Practice Problems

Item 1

Calculate an Analysis of Regression on the following data, where Reading is predicting Education:

Reading     Education
15                 11
7                  8
2                  5
9                  4
4                  4
11                  9

What is the Pearson r: _______

Perform the following calculations:

SS     df     ms

Regression         ____     ____     ____

Error                 ____     ____     ____

TOTAL             ____     __

What is the F for this test: ____________

Item 2

Calculate an Analysis of Regression on the following data, where TV watching predicts Violence:

Television Violence
2                       7
4                     14
8                     12
13                       8
16                       5
19                       2

Perform the following calculations:

SS df ms

Regression         ____     ____     ____

Error                 ____     ____     ____

TOTAL             ____     ____

What is the F for this test: ______

Item 3

To discover if TV watching has a significant impact on people’s shyness, use the following information, perform an Analysis of Regression and complete the following summary table:

r= .88
SSx = 50
SSy = 74
N = 12

SS df ms

Regression         ____     ____     ____

Error                 ____     ____     ____

TOTAL             ____     ____

What is the F for this test: ___________

What is the critical value for F: _________

Is the F significant? ________

Item 4

To discover if learning statistics has a significant impact on people’s friendliness, use the following information, perform an Analysis of Regression and complete the following summary table:

r= .32
SSx = 30
SSy = 66
N = 15

SS df ms

Regression         ____     ____     ____

Error                 ____     ____     ____

TOTAL             ____     ____

What is the F for this test: ___________

Is the critical value for F: ____________

 

Answers

NOW YOU CHOOSE:
Day 7: Probability
Bit More About Probability
Even More About Probability
Even More About ANOR
Calculate ANOR
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Sim1 Sim2 Sim3
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Quiz 7
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Practice Problems: Regression

November 4, 2008 by  
Filed under Practice Problems, Regression

Item 1
If there are 6 petals on a flower, how much will an elephant plant weigh (in pounds):
Petals Weight
8                 1
5                 6
2                 7
1                 8
9                 2
SSx = _____
SSy = _____
SSxy = ____
a = _____
b = _____
Item 2
If there are 9 dolls, how many truckes will a child have:
Trucks Dolls
12                   11
8                     7
6                     5
2                     1
4                     3
9                     9
14                   15
a = _____
b = _____
r = _____
standard error of estimate (SEE) = _____
Item 3
If your high school GPA is 3.3, what would you predict your college GPA to be:
High Schl College
1.0             3.9
2.5             3.7
3.3             1.4
4.0             1.0
2.3             2.9
a = _____
b = _____
Item 4
If there are 22 ducks, how many cows will the farmer own:
Ducks Cows
3                     11
6                      6
9                      8
11                      1
15                      2
4                     10
5                      7
a = _____
b = _____
r = _____
standard error of estimate (SEE) = _____
Item 5
If there are 3 doctors, how many nurses will a hospital have
Doctors Nurses
9              15
4                5
2                3
11               1
16             18
17             10
a = _____
b = _____
see = _____

Practice Problems: Correlation

November 3, 2008 by  
Filed under Correlation, Practice Problems

Item 1

What is the correlation between these two variables:
Stress                Sense of Humor
4                             2
10                             8
12                           11
5                             3
7                             8
6                             7
2                             3
14                           13
SSx = _____
SSy = _____
SSxy = _____
r = _____

 

Item 2

What is the correlation between these two variables:
Laughter                      Statistics
11                              19
3                                6
5                                6
15                              12
7                                8
6                                7
9                              14

SSx = _____
SSy = _____
SSxy = _____
r = _____

 

Item 3

How much variance is accounted for between these two variables:

Strength                   Speed
12                           3
9                           7
6                           9
3                         11
1                         15
7                           6

SSx = _____
SSy = _____
SSxy = _____
r = _____
rsquared = _____

 

Item 4

What is the correlation between these two variables:

Strength                Peace
2                         2
6                         5
7                         8
14                       19
15                       12
9                         8
4                         5

SSx = _____
SSy = _____
SSxy = _____
r = _____
rsquared = _____

 

Answers

 

NOW YOU CHOOSE:
Day 5: Correlation
Bit More About Correlation
Even More About Correlation
Calculate Correlation
Practice Problems
More Practice Problems
Word Problems
Sim1 Sim2 Sim3
Sim4 Sim5 Sim6
Sim7 Sim8 Sim9
Basic Facts About Correlation
Vocabulary
Formulas
Quiz 5
Summary

 

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