2. What do we know about the p-value compared to alpha?
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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How do I do question 2 I’m lost and don’t know the answer

Transcribed Image Text:2. What do we know about the p-value compared to alpha?
3. Which error could we be making (Type I or Type II)?
type I was
involued when null wco rejecte
+ype Il 0cG urs when we reject the null even though
it
was actually true,
4. What does this article tell you about statistical and practical significance?
the articie Says that eating more vecjetables
is assEcicted with Statistically prove n
Significan+ reduction in cancer risk, Since the
Conciusionis based on Just #S B StatistICS,
practical Significance Occurs when it has proven
+hat,eating more vegetables indicates healthy
diet whicn may rea uce cancer risk.
76 Theme 5: Hypothesis Testing

Transcribed Image Text:BEYOND THE NUMBERS 5.3
Statistical Significance
in the Media-Part II
Name:
Section Number:
To be graded, all assignments must be completed and submitted on the original book page.
EXHIBIT 1
Should I Eat My Vegetables?
Eat Your Veggies
Title:
Eating Vegetables Doesn't Stop Cancer
Author:
Tara Parker-Pope
New York Times, April 8, 2010, http://well.blogs.nytimes.com/2010/04/08/eating-
vegetables-doesnt-stop-cancer/
Source:
A recent New York Times article reported, "A major study tracking the eating habits of 478,000
Europeans suggests that consuming lots of fruits and vegetables has little if any effect on
preventing cancer." The study, which was published in The Journal of the National Cancer
Institute, "tracked 142,605 men and 335,873 women for an average of nearly nine years.
Eating more vegetables was associated with a small but statistically significant reduction in
cancer risk."
Questions
1. What was the conclusion in their test? Did they reject H, or fail to reject H,? How do you know?
they rejected the ull hy pothesis Since it is
mentioned in the final sentence that after
observing for a
1ong period o+
been found that eating more regetabies was
time, it has
directly related w Sighiticant requction in
Cancer risk
Theme 5: Hypothesis Testing 75
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