ChE253K Spring09 HW03 Solutions.2a

# ChE253K Spring09 HW03 Solutions.2a - ChE 253K Applied...

This preview shows pages 1–4. Sign up to view the full content.

ChE 253K -- Applied Statistics -- Homework #3 Due Wednesday, February 18 at Lecture 1. IQR and Outliers by Hand ( 5 Points. Scored for accuracy.) 2. Learning to use JMP ( 5 Points. Scored for completion.) 3. Data Distribution in JMP ( 5 Points. Scored for completion.) (a) Print the Distribution results window (b) Is the distribution normal, skewed or ugly? (c) Does the Outlier Box Plot indicate outliers? (d) Select the outlier points,. (e) Are these outliers "bad"? 4. Lecture 07 Problem ( 5 Points. Scored for completion.) 5. Fall 2006 Midterm, Problem 1 – Linear regression ( 10 Points. Scored for accuracy.) (a) Construct a table showing all the S xx , S yy , S xy values (b) Slope and intercept of the regression line. (c) Correlation coefficient (r) and coefficient of determination (r 2 ) (d) 95% confidence limits on the slope and intercept. (e) Based on this linear least-squares fit, calculate . .. Total: 30 Points

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
1. IQR and Outliers by Hand Please calculate the Inter-quartile Range (IQR) and use the IQR test to find any outliers in the following data. X(i) = {850, 740, 900, 1070, 930, 850, 950, 880, 620, 800, 850, 880, 780, 790, 830} Data in ascending order: 620 740 780 790 800 830 850 850 850 880 880 900 930 950 1070 (N = 15) 1st Quartile: X(4) = 790 pN = 0.25(15) = 3.75 round-up 4 = index 3rd Quartile: X(12) = 900 pN = 0.75(15) = 11.25 round-up 12 = index 3-1 Inter-Quartile Range = 900 790 = 110 Outlier Threshold = 1.5 × IQR = 165 Possible Outlier Low: Q1 Min = 790 620 = 170 > Threshold Outlier = 620 Possible Outlier High: Max Q3 = 1070 900 = 170 > Threshold Outlier = 1070
REGAL SPEEDYTYPE WORD-O-MATIC 2. Learning to use JMP Work through JMP Introductory Guide, Chapter 1, Steps 1 thru 6, and analyze the distribution of the TypingData.jmp sample file. Copy and paste your results window to a Word document and print. The Introductory Guide is highlighted to help you in ChE253K_JMP Introductory Guide.1.pdf Copying and pasting from JMP, and neatening-up a little in Word.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 9

ChE253K Spring09 HW03 Solutions.2a - ChE 253K Applied...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online