Let’s say that I want to test a hypothesis that drivers who are pooled over driving a sports car receive speeding fines that are higher than drivers operating other types of cars. Using a large sample (n over 30), I find that Zobt=1.87. Is this difference statistically significant (i.e., would I reject the null) at α=0.05 level? Why/why not? Would I reject the null if this was a non-directional
Let’s say that I want to test a hypothesis that drivers who are pooled over driving a sports car receive speeding fines that are higher than drivers operating other types of cars. Using a large sample (n over 30), I find that Zobt=1.87. Is this difference statistically significant (i.e., would I reject the null) at α=0.05 level? Why/why not? Would I reject the null if this was a non-directional
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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Let’s say that I want to test a hypothesis that drivers who are pooled over driving a sports car receive speeding fines that are higher than drivers operating other types of cars. Using a large sample (n over 30), I find that Zobt=1.87.
- Is this difference statistically significant (i.e., would I reject the null) at α=0.05 level? Why/why not?
- Would I reject the null if this was a non-directional (two-tailed) test at α=0.05 level? In other words, if the problem was asking to examine whether driving a sports car makes a difference in speeding fines.
Why/why not?
- Which of these tests is more likely to lead to a Type I error? Why?
- Which of these tests is more likely to lead to a Type II error? Why?
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