29 Jan 11. Create a scatterplot for the data
STAT3001 Statistical Methods and Applications
Week 3 Project
Part I. Analyze Data
Instructions Answers
1. Open the file Car Measurements using menu option Datasets and then Elementary Stats, 12th Edition. This file contains information about measurements of various cars. How many observations are there in this file?
2-7 Analyze the data in this file and complete the following table, indicating for each variable what type of data it represents.
Variable Qualitative/ Quantitative Discrete/ Continuous/ Neither Level of Measurement
Size
Length (LN)
Displacement (Displa in liters)
Breaking Distance (Braking)
8. Would you consider this data to represent a sample or a population? Why?
Part II. ScatterPlots
9. Create a scatterplot for the data in the city MPG (city) and GHG (greenhouse gasses) columns where city MPG is the x value. Paste it here. You may need to resize the plot once it is in this file.
10. Explain the visual relationship between city MPG and greenhouse emissions. Is the relationship positive or negative, weak, moderate or strong?
11. Create a scatterplot for the data in the length and braking distance columns. Paste it here. You may need to resize the plot once it is in this file.
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Part III. Correlation
13. Using Stat Disk, calculate the linear correlation between the data in the City MPG and GHG columns. List the steps used for the calculation and give the resulting correlation coefficient. • Open Stat Disk
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