Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337794503
Author: PECK
Publisher: Cengage
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Chapter 11.2, Problem 36E
The paper “Less Air Pollution Leads to Rapid Reduction of Airway Inflammation and Improved Airway
The authors of the paper used paired t tests to determine that there was a significant difference in the urban and rural means for each of these three measures. One of these tests resulted in a P-value less than 0.001, one resulted in a P-value between 0.001 and 0.01, and one resulted in a P-value between 0.01 and 0.05.
- a. Which measure (Eosinophils, FENO, or PEF) do you think resulted in a test with the P-value that was less than 0.001? Explain your reasoning.
- b. Which measure (Eosinophils, FENO, or PEF) do you think resulted in the test with the largest P-value? Explain your reasoning.
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1. Find the mean of the x-values (x-bar)
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2. Label the second row in the table using proper notation; then, complete the table. In the fifth and sixth
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X
y
x minus x-bar y minus y-bar (x minus x-bar)(y minus y-bar)
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4. Find the slope of the Regression line: bi
=
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5. Find the y-intercept of the Regression line, and then write the equation of the Regression line.
Show your work. Then, BOX your final answer. Express your line as "y-hat equals...
Apply STATA commands & submit the output for each question only when
indicated below
i.
Generate the log of birthweight and family income of children. Name
these new variables Ibwght & Ifaminc. Include the output of this
code.
ii. Apply the command sum with the detail option to the variable
faminc. Note: you should find the 25th percentile value, the 50th
percentile and the 75th percentile value of faminc from the output -
you will need it to answer the next question Include the output of this
code.
iii.
iv.
Use the output from part ii of this question to Generate a variable
called "high_faminc" that takes a value 1 if faminc is less than or
equal to the 25th percentile, it takes the value 2 if faminc is greater
than 25th percentile but less than or equal to the 50th percentile, it
takes the value 3 if faminc is greater than 50th percentile but less than
or equal to the 75th percentile, it takes the value 4 if faminc is greater
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solve this on paper
Chapter 11 Solutions
Introduction To Statistics And Data Analysis
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