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# Mt139C3 - MTB > Describe'Quiz1 Descriptive Statistics...

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MT139C3.PPT 1 5 4 3 2 10 5 0 Quiz1 Frequency MTB > Describe 'Quiz1'. Descriptive Statistics Variable N Mean Median Tr Mean StDev SE Mean Quiz1 22 4.000 4.000 4.050 1.069 0.228 Variable Min Max Q1 Q3 Quiz1 2.000 5.000 3.000 5.000

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MT139C3.PPT 2 No Response ( 5, 22.7%) 3 (17, 77.3%) Pie Chart of Speed The pace of the first class was (circle one): Way Too Slow (1) Too Slow (2) Just Right (3) Too Fast (4) Way Too Fast (5)
MT139C3.PPT 3 5 4 3 2 1 10 5 0 Quiz2 Frequency MTB > Describe 'Quiz2'. Descriptive Statistics Variable N Mean Median Tr Mean StDev SE Mean Quiz2 21 4.381 5.000 4.421 0.805 0.176 Variable Min Max Q1 Q3 Quiz2 3.000 5.000 4.000 5.000

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MT139C3.PPT 4 Class Lectures Have Prepared Me To Do The Homework (circle one): Not At All Almost Well Enough Very Well Very Well ( 4, 19.0%) Well Enough ( 2, 9.5%) Almost ( 3, 14.3%) No Response (12, 57.1%) Pie Chart of Lecture
MT139C3.PPT 5 Response and Explanatory Variables To Study a Relationship Between Two Variables, We Measure Both Variables on the Same Individuals Sometimes We Simply Observe the Two Variables and the Relationship Between Them Without Attempting to Say that One Variable Explains or Influences the Other Prediction Requires that We Determine Which is the Response Variable and Which is the Explanatory Variable: The Response Variable Measures the Outcome of a Study The Explanatory Variable Explains or Influences Changes in the Response Variable

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MT139C3.PPT 6 Example (BPS 2.1) In Each of the Following Situations, is it More Reasonable to Simply Explore the Relationship Between the Two Variables or to View One as Explanatory and the Other as the Response? In the Latter Case, Which Variable is Explanatory and Which is Response? The Amount of Time a Student Spends Studying for a Statistics Exam and Their Grade on the Exam The Weight and Height of a Person The Amount of Yearly Rainfall and the Yield of a Crop A Student’s Grades in Statistics and in French The Occupational Class of a Father and of His Son Smoking and Lung Cancer Rates Years of Education and Yearly Income Shoe Size and Reading Level Among Elementary Students The Weight and Cost of a New Automobile
MT139C3.PPT 7 800 700 600 500 400 4 3 2 1 0 Verbal GPA Scatterplots Shows the Relationship Between Two Quantitative Variables Measured on the Same Individuals The Values of One Variable are Plotted on the Horizontal or x-Axis The Values of the Second Variable are Plotted on the Vertical or y- Axis Each Individual is Plotted as a Single Point on the Scatterplot Plot the Explanatory Variable on the x-Axis, Response on the y Example: SAT Verbal Scores and First Year College GPA

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MT139C3.PPT 8 700 600 500 50 40 30 20 10 Registered Killed Scatterplot Example (BPS 2.4) The Endangered Manatee 1977 to 1990: Powerboats Manatees Registered Killed 447 13 460 21 481 24 498 16 513 24 512 20 526 15 559 34 585 33 614 33 645 39 675 43 711 50 719 47
MT139C3.PPT

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Mt139C3 - MTB > Describe'Quiz1 Descriptive Statistics...

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