Correlation and Regression Worksheet_lab 9

# Correlation and Regression Worksheet_lab 9 - Lab 9:...

This preview shows pages 1–3. Sign up to view the full content.

Lab 9: Correlation and Regression Exercise Please use “CorReg.sav” dataset posted on toolkit. 1) Produce a frequency histogram and boxplot for each of your variables. a) From the histogram, describe the distributions in terms of measures of central tendency, variability, range, and shape. EYBC— Mean—59.03 Median—58.00 Mode—52.00 The scores are fairly tightly clustered around the mean. The median is very close to the mean, and the mode isn’t far off, so the distribution is more or less normal. There aren’t any scores lower than 38, but there are several scores at the top of the range, 90. The standard deviation is ~8.00, or ~13%, nearly the same as the normal curve (~15%)

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

View Full Document
b) From the box plot, describe the median, 25 th and 75 th percentile, and any outliers. Statistics EYBC- age2:PC-Total Intensity T- Score CESDD-Age 2:PC Depression Score N Valid 731 729 Missing 2 4 Mean 59.0342 16.7353 Median 58.0000 15.0000 Mode 52.00 11.00 Std. Deviation 7.96139 10.67227 Variance 63.384
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 04/10/2008 for the course ASTR 121 taught by Professor Tolbert during the Spring '08 term at UVA.

### Page1 / 4

Correlation and Regression Worksheet_lab 9 - Lab 9:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online