9. An experiment was conducted to see if advertisements affect the choice of snack a person cats. Twenty teenage volunteers were assigned randomly to two groups and watched a television program. One group of voluntcers watched a program with no ads and the other group watchcd the same program, but with ads about healthy snacks. After the program, the teenagers were offered healthy and unhcalthy snacks. The proportion of tcenagers choosing healthy snacks in the group that watched the program with the ads was larger than the proportion of teenagers choosing healthy snacks that watchcd the program without ads, and the difference was statistically significant. What does it mean that the difference was statistically significant? The observed difference in the proportion of teenagers choosing healthy snacks in the two groups is so large that it is unlikely to occur only as a result of random assignment to the groups, so the ads seem to affect the choice of snacks chosen to a. eat. b. The obscrved difference in the proportion of teenagers choosing healthy snacks in the two groups was small enough to attribute to chance variation, so the ads secm to affect the choice of snacks chosen to cat. C. The obscrved difference in the proportion of teenagers choosing hcalthy snacks in the two groups is so large that it is unlikcly to occur only as a result of random assignments to groups, so the ads do not seem to affect the choice of snacks chosen to cat. d. The observed difference in the proportion of teenagers choosing healthy snacks in the two groups was small cnough to attribute to chance variation, so the ads do not seem to affect the choice of snacks chosen to cat.
9. An experiment was conducted to see if advertisements affect the choice of snack a person cats. Twenty teenage volunteers were assigned randomly to two groups and watched a television program. One group of voluntcers watched a program with no ads and the other group watchcd the same program, but with ads about healthy snacks. After the program, the teenagers were offered healthy and unhcalthy snacks. The proportion of tcenagers choosing healthy snacks in the group that watched the program with the ads was larger than the proportion of teenagers choosing healthy snacks that watchcd the program without ads, and the difference was statistically significant. What does it mean that the difference was statistically significant? The observed difference in the proportion of teenagers choosing healthy snacks in the two groups is so large that it is unlikely to occur only as a result of random assignment to the groups, so the ads seem to affect the choice of snacks chosen to a. eat. b. The obscrved difference in the proportion of teenagers choosing healthy snacks in the two groups was small enough to attribute to chance variation, so the ads secm to affect the choice of snacks chosen to cat. C. The obscrved difference in the proportion of teenagers choosing hcalthy snacks in the two groups is so large that it is unlikcly to occur only as a result of random assignments to groups, so the ads do not seem to affect the choice of snacks chosen to cat. d. The observed difference in the proportion of teenagers choosing healthy snacks in the two groups was small cnough to attribute to chance variation, so the ads do not seem to affect the choice of snacks chosen to cat.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:d. So that if two of the voluntéers khow eacil
groups.
9. An experiment was conducted to see if advertisements affect the choice of snack a person cats. Twenty
teenage volunteers were assigned randomly to two groups and watched a television program. One group
of voluntcers watched a program with no ads and the other group watched the same program, but with ads
about healthy snacks. After thc program, the teenagers were offered healthy and unhcalthy snacks. The
proportion of teenagers choosing healthy snacks in the group that watched the program with the ads was
larger than the proportion of teenagers choosing healthy snacks that watchcd the program without ads,
and the difference was statistically significant. What does it mean that the difference was statistically
significant?
The observed difference in the proportion of teenagers choosing healthy snacks in
the two groups is so large that it is unlikely to occur only as a result of random
assignment to the groups, so the ads seem to affect the choice of snacks chosen to
a.
eat.
b. The obscrved difference in the proportion of tcenagers choosing healthy snacks in
the two groups was small enough to attribute to chance variation, so the ads secm to
affect the choice of snacks chosen to cat.
The observed difference in the proportion of teenagers choosing hcalthy snacks in
the two groups is so large that it is unlikcly to occur only as a result of random
assignments to groups, so the ads do not seem to affect the choice of snacks chosen
to eat.
d. The observed difference in the proportion of teenagers choosing healthy snacks in
the two groups was small enough to attribute to chance variation, so the ads do not
seem to affect the choice of snacks chosen to cat.
c.
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