MTH152-Q14

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course MTH 152

Time: 4:29 PMDate: 7/25

If your solution to stated problem does not match the given solution, you should self-critique per instructions at

http://vhcc2.vhcc.edu/dsmith/geninfo/labrynth_created_fall_05/levl1_22/levl2_81/file3_259.htm.

Your solution, attempt at solution.

If you are unable to attempt a solution, give a phrase-by-phrase interpretation of the problem along with a statement of what you do or do not understand about it. This response should be given, based on the work you did in completing the assignment, before you look at the given solution.

014. ``q Query 14

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Question: `q Query problem 13.1.6 freq dist 35 IQ scores class width 5

YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

Your solution:

- My method was to show that to make 5 groups of 9 one must find the lowest quantity and the highest quantity to ensure all values are considered but none are overlapped.

-

-

- 91-95 1 1/50 = 2%

- 96-100 3 3/50 = 6%

- 101-105 5 5/50 = 10%

- 106-110 7 7/50 = 14%

- 111-115 12 12/50 = 24%

- 116-120 9 9/50 = 18%

- 121-125 8 8/50 = 16%

- 126-130 3 3/50 = 6%

- 131-135 2 2/50 = 4%

confidence rating #$&*: 3

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Given Solution:

`a These numbers might or might not be completely accurate, but the calculation of the relative frequencies as percents follows from the tallies:

91-95 1 1/50 = 2%

96-100 3 3/50 = 6%

101-105 5 5/50 = 10%

106-110 7 7/50 = 14%

111-115 12 12/50 = 24%

116-120 9 9/50 = 18%

121-125 8 8/50 = 16%

126-130 3 3/50 = 6%

131-135 2 2/50 = 4% **

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Self-critique (if necessary):

- Pretty straightforward stuff. Feels a bit like clerical work.

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Self-critique Rating:

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Question: `q Query problem 13.1.10 stem and leaf for yards gained by 44 rushers

YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

Your solution:

- My method for approaching this was to first copy down the raw data in pencil below where I’m working, the subsequently finding the highest value. I see that 123 is the highest, so I know to plot my “stem” column from 0 - 12

0 3 7

1 2 6 8 9

2 2 4 5 8 9 9

3 0 2 3 3 5 6 7 9

4 0 1 2 3 3 5 6 9

5 1 4 5 8

6 0 2 7

7 3 3 9

8 6 8

9 4

10 2

11 2

12 3

confidence rating #$&*:

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Given Solution:

`aIn order we get the following:

0 3 7

1 2 6 8 9

2 2 4 5 8 9 9

3 0 2 3 3 6 6 7 9

4 0 1 2 3 3 5 6 9

5 1 4 5 8 6 0 2 7

7 3 3 9

8 6 8

9 4

10 2

11 2

12 3 **

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Self-critique (if necessary):

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Self-critique Rating:

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Question: `q Query problem 13.1.35 empirical probability distribution for letters of alphabet

YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

Your solution:

- The given probabilities are

- A = .08 /.385 = .208

- E = .13 /.385 = .338

- I = .065 /.385 = .169

- O = .08 / .385 = .208

- U = .03 /.385 = .078

Sum = 1.001

confidence rating #$&*:

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Given Solution:

`aThe probabilities for A, E, I, O, U are:

.08. .13, .065, .08, .03.

The sum of these probabilities is .385

The probabilities of the letters given a vowel:

.08 / .385 = .208

.13 / .385 = .338

.065 / .385 = .169

.08 / .385 = .208

.03 / .385 = .078

These probabilities total 1. **

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Self-critique (if necessary):

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Self-critique Rating:

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Self-critique (if necessary):

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Self-critique rating:

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Self-critique (if necessary):

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Self-critique rating:

#*&!

@&

There are things in the second half of the chapter that are a bit more challenging, but this part is a lot like clerical work.

Maybe a relief after the chapters on counting and probability.

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