Stats: Data and Models
5th Edition
ISBN: 9780135164013
Author: DeVeaux
Publisher: PEARSON CO
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Chapter 7, Problem 5E
a.
To determine
Find an estimate of slope
b.
To determine
Describe the meaning of slope estimate in this context.
c.
To determine
Find the interpret
d.
To determine
Describe the meaning of intercept in this context and find whether it is meaningful or not.
e.
To determine
Write the equation that predicts sales from number of sales people working.
f.
To determine
If 18 people are working, predict the sales.
g.
To determine
If sales are actually $25,000, find the value of the residual.
h.
To determine
Find whether the sales are overestimated or underestimated.
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Students have asked these similar questions
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
than the 75th percentile. Include the outcome of this code…
solve this on paper
Apply STATA commands & submit the output for each question
only when indicated below
i. Apply the command egen to create a variable called "wyd"
which is the rowtotal function on variables bwght & faminc.
ii. Apply the list command for the first 10 observations to
show that the code in part i worked. Include the outcome of
this code
iii. Apply the egen command to create a new variable called
"bwghtsum" using the sum function on variable bwght by
the variable high_faminc (Note: need to apply the bysort'
statement)
iv. Apply the "by high_faminc" statement to find the
V.
descriptive statistics of bwght and bwghtsum Include the
output of this code.
Why is there a difference between the standard deviations
of bwght and bwghtsum from part iv of this question?
Chapter 7 Solutions
Stats: Data and Models
Ch. 7.4 - A scatterplot of house Price (in dollars) vs....Ch. 7.4 - Prob. 2JCCh. 7.4 - Prob. 3JCCh. 7.4 - Prob. 4JCCh. 7.4 - Prob. 5JCCh. 7.4 - Prob. 6JCCh. 7.6 - Prob. 7JCCh. 7.6 - Prob. 8JCCh. 7.6 - Prob. 9JCCh. 7 - Prob. 1E
Ch. 7 - 2. True or false II If false, explain...Ch. 7 - 3. Least squares interpretations A least squares...Ch. 7 - 4. Residual interpretations The newborn grandson...Ch. 7 - Prob. 5ECh. 7 - 6. Disk drives 2016 again Recall the data on disk...Ch. 7 - Prob. 7ECh. 7 - 8. Sophomore slump again? An online investment...Ch. 7 - Prob. 9ECh. 7 - 10. Disk drives 2016, residuals Here are the...Ch. 7 - 11. Bookstore sales last time For the regression...Ch. 7 - Prob. 12ECh. 7 - Prob. 13ECh. 7 - Prob. 14ECh. 7 - Prob. 15ECh. 7 - Prob. 16ECh. 7 - Prob. 17ECh. 7 - Prob. 18ECh. 7 - Prob. 19ECh. 7 - Prob. 20ECh. 7 - Prob. 21ECh. 7 - 22. Another car The correlation between a car’s...Ch. 7 - Prob. 23ECh. 7 - 24. Last tank! For Exercise 16’s regression model...Ch. 7 - 25. Regression equations Fill in the missing...Ch. 7 - Prob. 26ECh. 7 - Prob. 27ECh. 7 - 28. Residuals Tell what each of the residual plots...Ch. 7 - Prob. 29ECh. 7 - 30. Coasters 2015, revisited The data set on...Ch. 7 - Prob. 31ECh. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Prob. 34ECh. 7 - Prob. 35ECh. 7 - 36. More misinterpretations A Sociology student...Ch. 7 - 37. Real estate redux The regression of Price on...Ch. 7 - Prob. 38ECh. 7 - Prob. 39ECh. 7 - Prob. 40ECh. 7 - 41. More real estate Consider the Albuquerque home...Ch. 7 - Prob. 42ECh. 7 - Prob. 43ECh. 7 - Prob. 44ECh. 7 - Prob. 45ECh. 7 - 46. Attendance 2016, revisited Consider again the...Ch. 7 - Prob. 47ECh. 7 - Prob. 48ECh. 7 - Prob. 49ECh. 7 - 50. Interest rates and mortgages 2015 again In...Ch. 7 - 51. Online clothes An online clothing retailer...Ch. 7 - Prob. 52ECh. 7 - Prob. 53ECh. 7 - Prob. 54ECh. 7 - Prob. 55ECh. 7 - Prob. 56ECh. 7 - Prob. 57ECh. 7 - Prob. 58ECh. 7 - 59. Used cars 2014 Carmax.com lists numerous...Ch. 7 - Prob. 60ECh. 7 - Prob. 61ECh. 7 - Prob. 62ECh. 7 - Prob. 63ECh. 7 - Prob. 64ECh. 7 - Prob. 65ECh. 7 - 66. Cost of living 2016 Numbeo.com lists the cost...Ch. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Prob. 70ECh. 7 - Prob. 71ECh. 7 - Prob. 72ECh. 7 - 73. Women’s heptathlon revisited We discussed the...Ch. 7 - Prob. 74ECh. 7 - Prob. 75ECh. 7 - 76. Gators Wildlife researchers monitor many...Ch. 7 - Prob. 77ECh. 7 - Prob. 78E
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- According to a health information website, the distribution of adults’ diastolic blood pressure (in millimeters of mercury, mmHg) can be modeled by a normal distribution with mean 70 mmHg and standard deviation 20 mmHg. b. Above what diastolic pressure would classify someone in the highest 1% of blood pressures? Show all calculations used.arrow_forwardWrite STATA codes which will generate the outcomes in the questions & submit the output for each question only when indicated below i. ii. iii. iv. V. Write a code which will allow STATA to go to your favorite folder to access your files. Load the birthweight1.dta dataset from your favorite folder and save it under a different filename to protect data integrity. Call the new dataset babywt.dta (make sure to use the replace option). Verify that it contains 2,998 observations and 8 variables. Include the output of this code. Are there missing observations for variable(s) for the variables called bwght, faminc, cigs? How would you know? (You may use more than one code to show your answer(s)) Include the output of your code (s). Write the definitions of these variables: bwght, faminc, male, white, motheduc,cigs; which of these variables are categorical? [Hint: use the labels of the variables & the browse command] Who is this dataset about? Who can use this dataset to answer what kind of…arrow_forwardApply STATA commands & submit the output for each question only when indicated below İ. ii. iii. iv. V. Apply the command summarize on variables bwght and faminc. What is the average birthweight of babies and family income of the respondents? Include the output of this code. Apply the tab command on the variable called male. How many of the babies and what share of babies are male? Include the output of this code. Find the summary statistics (i.e. use the sum command) of the variables bwght and faminc if the babies are white. Include the output of this code. Find the summary statistics (i.e. use the sum command) of the variables bwght and faminc if the babies are male but not white. Include the output of this code. Using your answers to previous subparts of this question: What is the difference between the average birthweight of a baby who is male and a baby who is male but not white? What can you say anything about the difference in family income of the babies that are male and male…arrow_forward
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