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Questions on the Classical Approach Probability - Quiz 4 | MATH 1530, Quizzes of Probability and Statistics

Material Type: Quiz; Professor: Carter; Class: Elementary Probability & Statistics; Subject: Mathematics; University: Pellissippi State Technical Community College; Term: Unknown 1989;

Typology: Quizzes

Pre 2010

Uploaded on 08/19/2009

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MATH 1530 QUIZ #4 (Quizpak 2) Name ______________________________
1. Consider a large set of data with a mean of
120x
and a standard deviation of
4s
.
If the data has a mound-shaped distribution, use the Empirical Rule to fill in the blanks
and label each region with the appropriate percentage.
2. What percentage of scores should you expect to fall below 116? ________________
3. Find the
z
-score for a score of
125x
.
z
= ________________ = ________________ = ________________
4. Explain in a complete sentence what this
z
-score tells us about the score
125x
.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
______ ______ ______ ______ ______ ______
2x s
x s
x
x s
2x s
______ ______ ______ ______ ______
pf3
pf4

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MATH 1530 – QUIZ #4 (Quizpak 2) Name ______________________________

  1. Consider a large set of data with a mean of x^ ^120 and a standard deviation of s^ ^4. If the data has a mound-shaped distribution, use the Empirical Rule to fill in the blanks and label each region with the appropriate percentage.
  2. What percentage of scores should you expect to fall below 116? ________________
  3. Find the z^ -score for a score of x^ ^125. z (^) = ________________ = ________________ = ________________
  4. Explain in a complete sentence what this z^ -score tells us about the score x^ ^125.



______ ______ ______ ______ ______ ______

x  2 s xs x xs x  2 s


MATH 1530 – Quiz # 5 (Quizpak 2) Name _________________________

1. Consider the following experiment:

Roll a fair die, record the number facing up.

Consider the following event:

A = { x | x is any even number greater than 2 }

Find each of the following according to the Classical Approach to

Probability.

P ( A ) = ____________

P ( A ) = ____________

2. Consider the following experiment:

One marble is to be randomly selected from a bag containing

5 blue marbles, 4 red marbles, and 3 green marbles.

Let B^ be the event where the marble selected is BLUE.

Find each of the following.

P ( B^ ) = ____________

P ( B ) = ____________

MTH 1530 – STATDISK WORKSHEET – CHAPTER 2 Name ______________________________ 2-1 a. Mean: _______________ Min: _______________ b. Mean: _______________ Max: _______________ c. Provide an explanation for any notable differences between the data for Regular Coke weights per can compared to Diet Coke weights per can._____________________________________


2-2 Mean: ______________ Median: _______________ St. Dev.: ______________ How is the mean affected if the same constant is added to every value in a data set?


How is the standard deviation affected if the same constant is added to every value in a data set?


If a new data set has a mean of (^) x 34.5 and a standard deviation of s 6.7 , what is the mean and standard deviation after 7 has been added to every value? ____________________________ 2-3 Mean: ______________ Median: _______________ St. Dev.: ______________ How is the mean affected if every value in a data set is multiplied by the same constant? ________


How is the standard deviation affected if every value in a data set is multiplied by the same constant? _______________________________________________________________________ If a new data set has a mean of (^) x 34.5 and a standard deviation of (^) s 6.7 , what is the mean and standard deviation after every value has been multiplied by 5? _________________________ 2-4 Mean: _______________ St. Dev.: ________________ Min: _________________ 2-5 Mean: _______________ St. Dev.: ________________ Min: _________________ 2-7 Mean: _______________ Standard Deviation: _______________ Will these results be the same for every set of data? _____________________________________ Explain: _______________________________________________________________________


2-8 Mean: ______________ Median: _______________ St. Dev.: ______________ How is the mean affected by the presence of an outlier? (Compare to 2-1) ________________________________________________________________ How is the median affected by the presence of an outlier? (Compare to 2-1) ________________________________________________________________ How is the standard deviation affected by the presence of an outlier? (Compare to 2-1) ________________________________________________________________ 2.14 Use “Frequency Table Generator” to find each of the following. Mean: _______________ Standard Deviation: _______________