Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter 17, Problem 15E
To determine
Test the null hypothesis.
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MORE BENEFITS OF EATING ORGANIC
Using specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic
potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional
data. In this case, we are testing
Họ : Po = Pc
Ha: Po > Pc
where p, and p. represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those
eating conventional food, respectively. Use a 5 % significance level.
Effect of Organic Bananas After 25 Days
After 25 days, the proportion of fruit flies eating organic bananas still alive is 0.45 , while the proportion still alive eating conventional
bananas is 0.42. The standard error for the difference in proportions is 0.029.
What is the value of the test statistic?
Round your answer to two decimal places.
z =
i
What is the p-value?
Round your answer to three decimal places.
p-value =
What…
MORE BENEFITS OF EATING ORGANIC
Using specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic
potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional
data. In this case, we are testing
Họ : Po = Pc
Ha: Po > Pc
where p, and p. represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those
eating conventional food, respectively. Use a 5 % significance level.
Effect of Organic Soybeans After 5 Days
After 5 days, the proportion of fruit flies eating organic soybeans still alive is 0.92, while the proportion still alive eating conventional
soybeans is 0.86. The standard error for the difference in proportions is 0.023.
What is the value of the test statistic?
Round your answer to two decimal places.
Z =
What is the p-value?
Round your answer to three decimal places.
p-value = i
What…
Do consumers spend more on a trip to Target or Walmart? Suppose researchers interested
in this question collected a systematic sample from 81 Target customers and 77 Walmart
customers by asking customers for their purchase amount as they left the stores. The data
collected is summarized by the accompanying table. Suppose researchers decide to test
the hypothesis that the means are equal. The degrees of freedom formula gives 155.63 df.
Test the null hypothesis at x = 0.01.
OA. Ho: HA-HB = 0
HA: HA-HB >0
B. Ho: HA-HB = 0
HA: HA-HB #0
OC. Ho: HA-HB=0
HA: HA-HB <0
D. Ho: HA-HB #0
HA: HA-HB=0
Compute the test statistic.
t= -3.14
(Round to two decimal places as needed.)
Find the P-value.
The P-value is
(Round to three decimal places as needed.)
n
y
S
Target
81
40
21
Walmart
77
50
19
14
8
1
Chapter 17 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 17.2 - A public broadcasting station plans to launch a...Ch. 17.2 - Prob. 2JCCh. 17.3 - Prob. 3JCCh. 17.3 - Prob. 4JCCh. 17.4 - Prob. 5JCCh. 17.4 - Prob. 6JCCh. 17.4 - Prob. 7JCCh. 17.4 - Prob. 8JCCh. 17.5 - Prob. 9JCCh. 17.5 - Recall the experiment comparing patients 4 weeks...
Ch. 17.5 - Prob. 11JCCh. 17 - Canada Suppose an advocacy organization surveys...Ch. 17 - Non-profits Do people who work for non-profit...Ch. 17 - Canada, deux The information in Exercise 1 was...Ch. 17 - Prob. 4ECh. 17 - Prob. 5ECh. 17 - Prob. 6ECh. 17 - Prob. 7ECh. 17 - Prob. 8ECh. 17 - Prob. 9ECh. 17 - Non-profits test Complete the analysis begun in...Ch. 17 - Prob. 11ECh. 17 - Prob. 12ECh. 17 - Prob. 13ECh. 17 - Athlete ages, again Using the summary statistics...Ch. 17 - Prob. 15ECh. 17 - Athlete ages, ninth inning The researchers in...Ch. 17 - Prob. 17ECh. 17 - Athlete ages, overtime Repeat the test you did in...Ch. 17 - Prob. 19ECh. 17 - Prob. 20ECh. 17 - Prob. 21ECh. 17 - Prob. 22ECh. 17 - Prob. 23ECh. 17 - Prob. 24ECh. 17 - Prob. 25ECh. 17 - Prob. 26ECh. 17 - Prob. 27ECh. 17 - Graduation The U.S. Department of Commerce...Ch. 17 - Prob. 29ECh. 17 - Carpal tunnel The painful wrist condition called...Ch. 17 - Prob. 31ECh. 17 - Prob. 32ECh. 17 - Ear infections A new vaccine was recently tested...Ch. 17 - Anorexia The Journal of the American Medical...Ch. 17 - Prob. 35ECh. 17 - Prob. 36ECh. 17 - Teen smoking A Vermont study published by the...Ch. 17 - Depression A study published in the Archives of...Ch. 17 - Birthweight The Journal of the American Medical...Ch. 17 - Politics and sex One month before the election, a...Ch. 17 - Prob. 41ECh. 17 - Prob. 42ECh. 17 - Pain Researchers comparing the effectiveness of...Ch. 17 - Gender gap Candidates for political office realize...Ch. 17 - Prob. 45ECh. 17 - Prob. 46ECh. 17 - Sensitive men In the same article from Exercise...Ch. 17 - Carbs Recently, the Gallup Poll asked 1005 U.S....Ch. 17 - Food preference GfK Roper Consulting gathers...Ch. 17 - Prob. 50ECh. 17 - Hot dogs In the July 2007 issue, Consumer Reports...Ch. 17 - Prob. 52ECh. 17 - Prob. 53ECh. 17 - Prob. 54ECh. 17 - Hot dogs, last one In Exercise 53, we saw a 90%...Ch. 17 - Third load of wash In Exercise 54, we saw a 98%...Ch. 17 - Prob. 57ECh. 17 - Prob. 58ECh. 17 - Prob. 59ECh. 17 - Prob. 60ECh. 17 - Commuting A man who moves to a new city sees that...Ch. 17 - Pulse rates A researcher wanted to see whether...Ch. 17 - Prob. 63ECh. 17 - New construction The house sales we looked at in...Ch. 17 - Cereal sugar The data below show the sugar content...Ch. 17 - Prob. 66ECh. 17 - Prob. 67ECh. 17 - Prob. 68ECh. 17 - Cholesterol and gender Are men or women at higher...Ch. 17 - Prob. 70ECh. 17 - Home runs 2016 American League baseball teams play...Ch. 17 - Prob. 72ECh. 17 - Prob. 73ECh. 17 - Prob. 74ECh. 17 - Prob. 75ECh. 17 - Ad campaign You are a consultant to the marketing...Ch. 17 - Prob. 77ECh. 17 - Thirsty? Researchers randomly assigned...Ch. 17 - Prob. 79ECh. 17 - Prob. 80ECh. 17 - Tees Does it matter what kind of tee a golfer...Ch. 17 - Golf again Given the test results on golf tees...Ch. 17 - Music and memory Is it a good idea to listen to...Ch. 17 - Rap Using the results of the experiment described...Ch. 17 - Prob. 87ECh. 17 - Prob. 88E
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