statistics project

SEMESTER PROJECT GRADING RUBRIC

Overall Impression - 10 Points

Graded Element 0 1 2 Points Earned

Title Page Title page omitted One or more required elements are missing

All required information provided

Sections 1-5, All Required Content

Present

One or more complete sections missing

One or more required content elements

missing

All required content elements included

Report in Proper Format

Not organized in 5 required sections

and/or has major issues with clarity

Organized in 5 required sections; some content

is difficult to locate/ understand

Organized in 5 required sections; all content is

easy to locate and clearly readable

Rounding of Numerical Calculations

Rounding rules ignored or inconsistently

applied

Isolated calculations rounded incorrectly

All calculations rounded per instructions

Writing Quality Writing is not at college

level (ENG 111 equivalent)

Understandable college- level writing;

noticeable issues w/ grammar/mechanics

Clear, concise, college- level writing; few

grammar/ mechanics mistakes

OVERALL IMPRESSION TOTAL POINTS: 0

Section 1: Visual Data Assessment - 8 Points

Graded Element 0 1 2

Variable #1 Histogram

Major errors in construction or formatting or

histogram omitted

Minor errors in construction or

formatting

Properly constructed/labeled

Variable #1 Histogram Written Analysis

Completely inaccurate, hard to understand,

missing required info, or omitted

Clearly written and covers all required information, but contains minor

inaccuracies

Clearly written, accurate, and covers all

required information

Variable #2 Histogram

Major errors in construction or formatting or

histogram omitted

Minor errors in construction or

formatting

Histogram is properly constructed/labeled

Variable #2 Histogram Written Analysis

Completely inaccurate, hard to understand,

missing required info, or omitted

Clearly written and covers all required information, but contains minor

inaccuracies

Clearly written, accurate, and covers all

required information

SEC 1 TOTAL POINTS: 0

Section 2: Descriptive Statistics - 26 Points

Graded Element 0 1 2

Mean Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Minimum Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Quartile 1 Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Median Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Quartile 3 Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Maximum Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Variance Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Standard Deviation Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Range Both values are incorrect and/or

omitted

One of the two values is incorrect or omitted

Values are correct for both variables

Variable 1 Regular Boxplot

Boxplot constructed/ formatted incorrectly

or omitted

Boxplot properly constructed and

labeled

Variable 1 Regular Boxplot Analysis

Inaccurate/hard to understand/missing

required info/omitted

Clearly written, accurate, and covers all

required information

Variable 2 Regular Boxplot

Boxplot constructed/ formatted incorrectly

or omitted

Boxplot properly constructed and

labeled

Variable 2 Regular Boxplot Analysis

Inaccurate/hard to understand/missing

required info/omitted

Clearly written, accurate, and covers all

required information

Variable 1 Modified Boxplot

Boxplot constructed/ formatted incorrectly

or omitted

Boxplot properly constructed and

labeled

Variable 1 Outlier Analysis

Inaccurate/hard to understand/missing

required info/omitted

Clearly written, accurate, and covers all

required information

Variable 2 Modified Boxplot

Boxplot constructed/ formatted incorrectly

or omitted

Boxplot properly constructed and

labeled

Variable 2 Outlier Analysis

Inaccurate/hard to understand/missing

required info/omitted

Clearly written, accurate, and covers all

required information

SEC 2 TOTAL POINTS: 0

Section 3: Confidence Intervals - 4 Points

Graded Element 0 1 2

Variable #1 95% Confidence Interval

Both limits incorrect, wrong distribution

used, or interval omitted

One of two limits incorrect, interval not in proper format, or

both

Both limits are correct and the interval is in the proper format

Variable #2 95% Confidence Interval

Both limits incorrect, wrong distribution

used, or interval omitted

One of two limits incorrect, interval not in proper format, or

both

Both limits are correct and the interval is in the proper format

SEC 3 TOTAL POINTS: 0

Section 4: Hypothesis Test - 13 Points

Graded Element 0 1 2

Null Hypothesis

Both parameter and relational operator

incorrect or hypothesis missing

Parameter or relational operator incorrect

Correct parameter and relational operator

Alternative Hypothesis

Both parameter and relational operator

incorrect or hypothesis missing

Parameter or relational operator incorrect

Correct parameter and relational operator

Distribution Used Information omitted Incorrect distribution Correct distribution

P-Value P-value incorrect or

omitted P-value correct

Relationship of P-Value to α

Logical relationship is either incorrect or

omitted

Logical relationship is correct (incorrect p-

value)

Correct logical relationship (correct p-

value only)

Decision re Null Hypothesis (Reject/Fail

to Reject)

Decision is incorrect or omitted

Correct decision (incorrect p-value)

Correct decision (correct p-value only)

Interpretation of Evidence (Sufficient/

Insufficient)

Incorrect decision or interpretation is

completely inaccurate or omitted

Interpretation wrt original claim contains

minor inaccuracies (correct decision only)

Accurate interpretation wrt original claim

(correct decision only)

SEC 4 TOTAL POINTS: 0

Section 5: Regression Analysis - 39 Points

Graded Element 0 1 2

Regression Equation Calculation

Both coefficients incorrect or equation

omitted

Equation not in proper format and/ or one of

the coefficients is incorrect

Equation is in proper format and both

coefficients are correct

Scatterplot Format Major construction/ formatting errors or scatterplot omitted

Minor formatting errors

Variables are plotted on proper axes; plot is

formatted correctly

Scatterplot Content Scatterplot omitted Some data values are

missing or plotted incorrectly

All paired data points are correctly plotted

Regression Equation Plot

Equation omitted from plot

Incorrect equation included in plot

Correct equation included in plot

Coefficient of Determination

Coefficient omitted Coefficient incorrect Correct coefficient

Coefficient of Determination Interpretation

Analysis is completely inaccurate, is hard to

understand, or is omitted

Analysis contains minor inaccuracies or is missing required

information

Interpretation is clearly written, complete, and

factually accurate

Influential Observation Analysis

Analysis is completely inaccurate, is hard to

understand, or is omitted

Analysis contains minor inaccuracies or is missing required

information

Interpretation is clearly written, complete, and

factually accurate

Hypothesis Test for Correlation: P-value

P-value incorrect or omitted

P-value correct

Hypothesis Test for Nonzero Slope:

Interpretation of Decision (Sufficient/

Insufficient Evidence)

Incorrect decision or interpretation is

completely inaccurate or omitted

Accurate interpretation wrt original claim

(incorrect decision)

Accurate interpretation wrt original claim

(correct decision only)

Estimated Regression Model: Overall

Assessment of Validity

Assessment incorrect/omitted

Correct assessment, factually inaccurate

justification

Correct assessment, factually accurate

justification

LINE Criterion L: Linear Fit

Analysis is hard to understand or is

omitted

Analysis contains inaccuracies or is missing required

information

Interpretation is clearly written, complete, and

factually accurate

LINE Criterion I: Independence

Independence assumption omitted

Independence assumption included

LINE Criterion N: Residuals Normally

Distributed

Analysis is hard to understand or is

omitted

Analysis contains inaccuracies or is missing required

information

Interpretation is clearly written, complete, and

factually accurate

Residual Histogram Plot is omitted or

wrong type of plot is provided

Plot has structural errors or is improperly

labeled

Plot is properly plotted and labeled

Q-Q Plot Plot is omitted or

wrong type of plot is provided

Plot has structural errors or is improperly

labeled

Plot is properly plotted and labeled

Hypothesis Test for Normality: P-value

P-value incorrect or omitted

P-value correct

Hypothesis Test for Normality:

Interpretation of Decision (Sufficient/

Insufficient Evidence)

Incorrect decision or interpretation is

completely inaccurate or omitted

Accurate interpretation wrt original claim

(incorrect decision)

Accurate interpretation wrt original claim

(correct decision only)

LINE Criterion E: Residuals Have

Constant Variance

Analysis is hard to understand or is

omitted

Analysis contains inaccuracies or is missing required

information

Interpretation is clearly written, complete, and

factually accurate

Residuals vs Predictors Plot

Plot is omitted or wrong type of plot is

provided

Plot has structural errors or is improperly

labeled

Plot is properly plotted and labeled

Estimate of New Response

Estimate incorrect/omitted

Correct estimate, factually inaccurate

justification

Correct estimate, factually accurate

justification

95% Prediction Interval for Mean Response

Interval omitted or derived from invalid model or incorrectly

reported as "N/A" for valid model

Interval derived from valid model but has

one or more incorrect limits

Both limits correct or interval correctly

reported as "N/A"

SEC 5 TOTAL POINTS: 0

OVERALL GRADE: 0