{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

test - THE UNIVERSITY OF HONG KONG DEPARTMENT OF STATISTICS...

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

View Full Document Right Arrow Icon
THE UNIVERSITY OF HONG KONG DEPARTMENT OF STATISTICS AND ACTUARIAL SCIENCE STAT1303 DATA MANAGEMENT (SEMESTER 1 2009/2010) Class Test November 5, 2009 Time: 4:00 p.m. - 5:00 p.m. Answer ALL THREE questions. Marks are shown in square brackets. 1. Some observations of a data °le ±PERFORM.DAT² are provided and some of the observations are shown as follows. The °le contains 8 variables and values are stored in di/erent column positions. The data values are stored in the data °le in the order of ID, DOE, NAME, DEPT, SECTION, GROUP, PERFORM AND SALARY. Create a SAS data set PERFORM in the folder ±D: n TEMP² . 1 2 3 4 5 ( column index 12345678901234567890123456789012345678901234567890 ( not in the data file -------------------------------------------------- 00112dec1999John Chan MARKETA13.45$12,300 ( observations in 01101jan1997Mary Lai SALES A22.76$4,300 ( the data file The output of PROC PRINT for the data set is given below: Obs ID DOE Name Dept Section group perform salary 1 1 12DEC1999 John Chan MARKET A 1 3.45 12300 2 11 01JAN1997 Mary Lai SALES A 2 2.76 4300 ... The variables ID, GROUP, PERFORM and SALARY are numeric variables. The last value may end at di/erent position (a) Write a SAS program to create the data set. When the column input is used, specify both the starting and ending column positions. [10 marks] (b) Write a SAS program to create the data set. When the column input is used, specify only the starting but not the ending column positions. [10 marks] [Total: 20 marks] 2. A study was conducted to investigate the height of plants with two types of fertilizers. The SAS data set FERTILIZER consists of two variables HEIGHT and FERTILIZER. FERTILIZER = 1 or 2 for the two types of fertilizers. Part of the SAS output are given as followings 1
Background image of page 1

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

View Full Document Right Arrow Icon
For fertilizer 1, The UNIVARIATE Procedure Variable: height Moments N 10 Sum Weights 10 Mean 51.91 Sum Observations 519.1 Std Deviation 3.37027859 Variance 11.3587778 Skewness 0.60003925 Kurtosis -0.2954342 Uncorrected SS 27048.71 Corrected SS 102.229 Coeff Variation 6.49254207 Std Error Mean 1.06577567 Basic Statistical Measures Location Variability Mean 51.91000 Std Deviation 3.37028 Median 51.70000 Variance 11.35878 Mode . Range 10.50000 Interquartile Range 5.50000 Tests for Normality Test --Statistic--- -----p Value------ Shapiro-Wilk W 0.951249 Pr < W 0.6833 Kolmogorov-Smirnov D 0.124543 Pr > D >0.1500 Cramer-von Mises W-Sq 0.028609 Pr > W-Sq >0.2500 Anderson-Darling A-Sq 0.214151 Pr > A-Sq >0.2500 For fertilizer 2, The UNIVARIATE Procedure Variable: height Moments N 8 Sum Weights 8 Mean 56.55 Sum Observations 452.4 Std Deviation 3.14415558 Variance 9.88571429 Skewness 0.1506603 Kurtosis -1.0830816 Uncorrected SS 25652.42 Corrected SS 69.2 Coeff Variation 5.55995681 Std Error Mean 1.11162686 Basic Statistical Measures Location Variability Mean 56.55000 Std Deviation 3.14416 Median 56.55000 Variance 9.88571 Mode . Range 9.00000 Interquartile Range 4.90000 2
Background image of page 2
Tests for Normality Test --Statistic--- -----p Value------ Shapiro-Wilk W 0.970532 Pr < W 0.9021 Kolmogorov-Smirnov D 0.11873 Pr > D >0.1500 Cramer-von Mises W-Sq 0.020152 Pr > W-Sq >0.2500 Anderson-Darling A-Sq 0.149336 Pr > A-Sq >0.2500 (a) Write SAS program(s) to generate the above SAS output. [5 marks] (b) What are the means, standard deviation, skewness and kurtosis of the heights for the two types of the fertilizers. Comment on skewness and kurtosis. [10 marks] (c) Write a SAS program to save the mean and standard deviation for height for the two types of fertilizers to a SAS data set SUMMARY. Do not include overall mean and SD. [10 marks]
Background image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}