Question
In: Statistics and Probability
A professor using an open source introductory statistics book predicts that 60% of the students will...
A professor using an open source introductory statistics
book
predicts that 60% of the students will purchase a hard copy of
the book, 25% will print it out from the web, and 15% will read it
online. At the end of the semester he asks his students to complete
a survey where they indicate what format of the book they used. Of
the 126 students, 73 said they bought a hard copy of the book, 30
said they printed it out from the web, and 23 said they read it
online.
(a) State the hypotheses for testing if the professor’s
predictions were inaccurate.
(b) How many students did the professor expect to buy the
book, print the book, and read the book exclusively online?
(c) This is an appropriate setting for a chi-square test. List
the conditions required for a test and verify they are
satisfied.
(d) Calculate the chi-squared statistic, the degrees of
freedom associated with it, and the p-value.
(e) Based on the p-value calculated in part (d), what is the
conclusion of the hypothesis test? Interpret your conclusion in
this context.
Solutions
orchestra answered 1 year agoRelated Solutions
A professor using an open source introductory statistics book predicts that 60% of the students will...
A professor using an open source introductory statistics book
predicts that 60% of the students will purchase a hard copy of the
book, 25% will print it out form the web, and 15% will read in
online. At the end of the semester he asks his students to complete
a survey where they indicate what format of the book they used. Of
the 126 students, 71 said they bought a hard copy of the book, 30
said they printed it...
1) A professor using an open-source introductory statistics book predicts that 60% of the students will...
1)
A professor using an open-source introductory statistics book
predicts that 60% of the students will purchase a hard copy of the
book, 25% will print it out from the web, and 15% will read it
online. At the end of the semester she asks her students to
complete a survey where they indicate what format of the book they
used. Of the 126 students, 71 said they bought a hard copy of the
book, 30 said they printed it...
1)A professor using an open-source introductory statistics book predicts that 60% of the students will purchase...
1)A professor using an open-source introductory statistics book
predicts that 60% of the students will purchase a hard copy of the
book, 25% will print it out from the web, and 15% will read it
online. She has 200 students this semester. Assuming that the
professor's predictions were correct, calculate the expected number
of students who read the book online.
2)The number of AIDS cases reported for Santa Clara County,
California is broken down by race in the table below....
6.41 Open source textbook: A professor using an open source introductory statistics book predicts that 60%...
6.41 Open source textbook: A professor using an
open source introductory statistics book predicts that 60% of the
students will purchase a hard copy of the book, 25% will print it
out from the web, and 15% will read it online. At the end of the
semester he asks his students to complete a survey where they
indicate what format of the book they used. Of the 126 students, 71
said they bought a hard copy of the book, 30...
1. A professor using an open source introductory statistics book predicts that 10% of the students...
1. A professor using an open source introductory statistics book
predicts that 10% of the students will purchase a hard copy of the
book, 55% will print it out from the web, and 35% will read it
online. At the end of the semester he asks his students to complete
a survey where they indicate what format of the book they used. Of
the 200 students, 25 said they bought a hard copy of the book, 85
said they printed...
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In a large introductory statistics lecture hall, the professor
reports that 53% of the students enrolled have never taken a
calculus course, 28% have taken only one semester of calculus,
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COIN TOSSES In a large class of introductory Statistics students, the professor has each student toss...
COIN
TOSSES In a large class of introductory Statistics
students, the professor has each student toss a coin 16 times and
calculate the proportion of his or her tosses that were heads. The
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histogram of these several proportions.
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A professor who teaches a large introductory statistics class (197 students) with eight discussion sections would...
A professor who teaches a large introductory statistics class
(197 students) with eight discussion sections would like to test if
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ni...
1) A statistics professor is examining if using the book in his class has any impact...
1) A statistics professor is examining if using the book in his
class has any impact on student test scores. For a sample of 30
Statistics students who were required to buy and read the book for
class, final semester grades were measured at the end of the
semester. The mean final grade for this class was 87. If the mean
final grade for all the previous classes (where students had not
been required to use the book) was 83...
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