Dropouts A Statistics professor has observed that forseveral years about 13% of the students who initiallyenroll in his Introductory Statistics course withdrawbefore the end of the semester. A salesman suggests thathe try a statistics software package that gets studentsmore involved with computers, predicting that it will cut the dropout rate. The software is expensive, and the sales-man offers to let the professor use it for a semester to see if the dropout rate goes down significantly. The professorwill have to pay for the software only if he chooses tocontinue using it.a) Is this a one-tailed or two-tailed test? Explain.b) Write the null and alternative hypotheses.c) In this context, explain what would happen if theprofessor makes a Type I error.d) In this context, explain what would happen if theprofessor makes a Type II error.e) What is meant by the power of this test?
Dropouts A Statistics professor has observed that forseveral years about 13% of the students who initiallyenroll in his Introductory Statistics course withdrawbefore the end of the semester. A salesman suggests thathe try a statistics software package that gets studentsmore involved with computers, predicting that it will cut the dropout rate. The software is expensive, and the sales-man offers to let the professor use it for a semester to see if the dropout rate goes down significantly. The professorwill have to pay for the software only if he chooses tocontinue using it.a) Is this a one-tailed or two-tailed test? Explain.b) Write the null and alternative hypotheses.c) In this context, explain what would happen if theprofessor makes a Type I error.d) In this context, explain what would happen if theprofessor makes a Type II error.e) What is meant by the power of this test?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
Dropouts A Statistics professor has observed that for
several years about 13% of the students who initially
enroll in his Introductory Statistics course withdraw
before the end of the semester. A salesman suggests that
he try a statistics software package that gets students
more involved with computers, predicting that it will cut
several years about 13% of the students who initially
enroll in his Introductory Statistics course withdraw
before the end of the semester. A salesman suggests that
he try a statistics software package that gets students
more involved with computers, predicting that it will cut
the dropout rate. The software is expensive, and the sales-
man offers to let the professor use it for a semester to see
man offers to let the professor use it for a semester to see
if the dropout rate goes down significantly. The professor
will have to pay for the software only if he chooses to
continue using it.
a) Is this a one-tailed or two-tailed test? Explain.
b) Write the null and alternative hypotheses.
c) In this context, explain what would happen if the
professor makes a Type I error.
d) In this context, explain what would happen if the
professor makes a Type II error.
e) What is meant by the power of this test?
will have to pay for the software only if he chooses to
continue using it.
a) Is this a one-tailed or two-tailed test? Explain.
b) Write the null and alternative hypotheses.
c) In this context, explain what would happen if the
professor makes a Type I error.
d) In this context, explain what would happen if the
professor makes a Type II error.
e) What is meant by the power of this test?
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