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Project_3_Grading_Rubric.docx

Project 3 Grading Rubric

Criteria

Levels of Achievement

Content 70%

Advanced

Proficient

Developing

Not Present

Points Earned

Mean, Standard Deviation, and Probability of closing less than the mean (#1)

3.6 to 4.0 points

Correct mean, standard deviation and probability. The probability is based on the normal distribution and not counting individual data values.

2.8 to 3.5 points

Minor error(s) in the standard deviation and probability calculations. The probability is correct and based on the normal distribution, not counting individual data values.

1 to 2.7 points

Probability given by counting data values, not based on the normal distribution.

0 points

Not present.

Probability closing above indicated value (#2)

3.6 to 4.0 points

Correct probability is given, based on the normal distribution, and work is shown.

2.8 to 3.5 points

Errors in probability calculation such as giving z (not probability) or giving less than rather than greater than.

1 to 2.7 points

Incorrect or no work shown or probability was given by counting data values, not based on the normal distribution.

0 points

Not present.

Probability closing within the indicated amount of the mean (#3)

3.6 to 4.0 points

Correct probability is given, based on the normal distribution, and work is shown.

2.8 to 3.5 points

Errors in probability calculation such as not finding correct values, giving z (not probability), or subtracting z’s.

1 to 2.7 points

Incorrect or no work shown or probability was given by counting data values, not based on the normal distribution.

0 points

Not present.

Probability closing below the indicated value (#4)

3.6 to 4.0 points

Correct probability is given, based on the normal distribution, and work is shown. Identify if this value is unusual

2.8 to 3.5 points

Errors in probability calculation such as giving z (not probability) or not identifying if value is unusual.

1 to 2.7 points

Incorrect or no work shown or probability was given by counting data values, not based on the normal distribution.

0 points

Not present.

Unusual closing values (#5)

3.6 to 4.0 points

Correct top and bottom value given

2.8 to 3.5 points

Errors in calculation include using the wrong number of standard deviations or only giving one value

1 to 2.7 points

Gives only definition of unusual but does not calculate or calculated incorrectly or no work is shown or not based on the normal distribution

0 points

Not present.

Quartiles (#6)

3.6 to 4.0 points

Correct quartiles given

2.8 to 3.5 points

Minor error in quartile calculation

1 to 2.7 points

Incorrect quartiles

0 points

Not present.

Validity of normality assumption (#7)

3.6 to 4.0 points

Correctly uses the definition to identify the validity of the normality assumption and connects it to the data set. If a histogram was constructed it is submitted as part of the answer.

2.8 to 3.5 points

Incorrectly concludes if the normality assumption is valid, but uses the definition in argument and connects it to the data set.

1 to 2.7 points

Does not refer to the definition of normality in conclusion, simply answers yes or no and does not connect it to the data set.

0 points

Not present.

Structure 30%

Advanced

Proficient

Developing

Not Present

Points Earned

Miscellaneous items: submitting the correct data range, correct mean, correct standard deviation

4.5 to 5.0 points

Submitted data set with correct date range. Responses were formatted in an easy to read file. Work was clearly shown.

3.5 to 4.4 points

Submitted correct data range. Responses were not formatted in an easy to read file. Work may not be clearly shown.

1 to 3.4 points

Submitted incorrect data range.

0 points

Not present.

Grammar and completeness (1 pt per problem)

6.3 to 7.0 points

Grammar is excellent. Response to last question is in complete sentences. All questions are fully answered.

4.9 to 6.2 points

Grammar has minor errors. Response to last question is in complete sentences. Some questions may not be fully answered.

1 to 4.8 points

Errors in grammar. Last question not in complete sentences. Many questions not fully answered.

0 points

Not present.

Total

/40

Instructor's Comments:

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