STATS:DATA+MODELS-MY LAB ACC >CUSTOM<
21st Edition
ISBN: 9780137643127
Author: DeVeaux
Publisher: PEARSON
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Chapter 3, Problem 41E
a.
To determine
Find the marginal distribution of blood pressure level.
b.
To determine
Find the conditional distribution of blood pressure level within each age group.
c.
To determine
Compare these distributions with a segmented bar graph.
d.
To determine
Write a brief description of the association between age and blood pressure among these employees.
e.
To determine
Explain whether the people’s blood pressure increases as they age.
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Students have asked these similar questions
One hundred students were surveyed about their preference between dogs and cats. The following two-way table displays data for the sample of students who responded to the survey.
Preference
Male
Female
TOTAL
Prefers dogs
\[36\]
\[20\]
\[56\]
Prefers cats
\[10\]
\[26\]
\[36\]
No preference
\[2\]
\[6\]
\[8\]
TOTAL
\[48\]
\[52\]
\[100\]
problem 1
Find the probability that a randomly selected student prefers dogs.Enter your answer as a fraction or decimal.
\[P\left(\text{prefers dogs}\right)=\]
Incorrect
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Hide explanation
Preference
Male
Female
TOTAL
Prefers dogs
\[\blueD{36}\]
\[\blueD{20}\]
\[\blueE{56}\]
Prefers cats
\[10\]
\[26\]
\[36\]
No preference
\[2\]
\[6\]
\[8\]
TOTAL
\[48\]
\[52\]
\[100\]
There were \[\blueE{56}\] students in the sample who preferred dogs out of \[100\] total students.
Business discuss
You have been hired as an intern to run analyses on the data and report the results back to Sarah; the five questions that Sarah needs you to address are given below.
Does there appear to be a positive or negative relationship between price and screen size? Use a scatter plot to examine the relationship.
Determine and interpret the correlation coefficient between the two variables. In your interpretation, discuss the direction of the relationship (positive, negative, or zero relationship). Also discuss the strength of the relationship.
Estimate the relationship between screen size and price using a simple linear regression model and interpret the estimated coefficients. (In your interpretation, tell the dollar amount by which price will change for each unit of increase in screen size).
Include the manufacturer dummy variable (Samsung=1, 0 otherwise) and estimate the relationship between screen size, price and manufacturer dummy as a multiple linear regression model.
Interpret the…
Chapter 3 Solutions
STATS:DATA+MODELS-MY LAB ACC >CUSTOM<
Ch. 3.2 - A statistics class reports the following data on...Ch. 3.2 - A statistics class reports the following data on...Ch. 3.2 - Prob. 3JCCh. 3.2 - A statistics class reports the following data on...Ch. 3.2 - A statistics class reports the following data on...Ch. 3.2 - A statistics class reports the following data on...Ch. 3.2 - Prob. 7JCCh. 3 - Prob. 1ECh. 3 - 2. Cyber comparison shopping It has become common...Ch. 3 - 3. College value again Consider the survey data in...
Ch. 3 - 4. Cyber comparison shopping again
Find the...Ch. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - 8. College value? revisited Here is a mosaic plot...Ch. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - 17. Death from the sky A recent article in...Ch. 3 - Prob. 18ECh. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - Prob. 22ECh. 3 - Prob. 23ECh. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Prob. 27ECh. 3 - 28. A sense of identity The Pew Research survey...Ch. 3 - 29. Seniors Prior to graduation, a high school...Ch. 3 - 30. Politics Students in an Intro Stats course...Ch. 3 - Prob. 31ECh. 3 - 32. Minimum wage workers The U.S. Department of...Ch. 3 - 33. More about seniors Look again at the table of...Ch. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Prob. 37ECh. 3 - Prob. 38ECh. 3 - Prob. 39ECh. 3 - 40. Twin births In 2000, the Journal of the...Ch. 3 - 41. Blood pressure A company held a blood pressure...Ch. 3 - 42. Obesity and exercise The Centers for Disease...Ch. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - 45. Drivers’ licenses 2014 The table below shows...Ch. 3 - Tattoos A study by the University of Texas...Ch. 3 - 47. Diet and politics shuffled In Exercise 5 you...Ch. 3 - 48. College values shuffled In Exercise 8 you were...Ch. 3 - 49. Hospitals Most patients who undergo surgery...Ch. 3 - 50. Delivery service A company must decide which...Ch. 3 - 51. Graduate admissions A 1975 article in the...Ch. 3 - 52. Be a Simpson Can you design a Simpson’s...
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