Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 2.3, Problem 20BB
Interpreting a Histogram. In Exercises 5-8, answer the questions by referring to the following Minitab-generated histogram, which represents the heights (inches) of people randomly selected from those who entered New York City’s Museum of Natural History during a recent Friday morning.
MINITAB
20. Interpreting a Histogram Refer to the histogram given for Exercises 5-8 and answer the following questions:
- a. What are the possible values (rounded to the nearest inch) of the largest height included in the histogram? What are those values expressed in feet and inches?
- b. Why is it wrong to say that the people with heights between 43 in. and 55 in. are the tallest people because they have the tallest bars in the histogram?
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1. Find the mean of the x-values (x-bar)
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X
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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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(simplify your answer)
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
than the 75th percentile. Include the outcome of this code…
solve this on paper
Chapter 2 Solutions
Elementary Statistics
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