Controlled experiments often make use of opportunity samples (college students), while survey research often makes use...
Controlled experiments often make use of opportunity samples (college students), while survey research often makes use of random sampling. Do you think this is a problem for experiments? Why do you think experimental research does not suffer as much when opportunity samples are used?
Homework Answers
Answer
Yes, this is a problem for experiments because we know that in the opportunity samples (college students), not every student is going to participate and some might decline to participate which will directly affect the probability distribution in sample.
I think experimental research does not suffer as much when opportunity samples are used because the researcher can judge about the participants and researcher also has the control to manage the research on selected participant, i.e. researcher can decide to whom he has to ask the research questions.
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Controlled experiments often make use of opportunity samples
(college students), while survey research often makes use...
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I created a survey to see if tobacco use increased for students while in college (see below). What hypothesis test should I use to test the data I collected and what level of significance would be appropriate? Thank you. How many cigs/day did you smoke b4 college? How many cigs/day did you smoke while in college? None: 10 2 1 to 3: 14 10 4 to 6: 9 12 7 to 9: 4 9 More than 10/day: 3 7 Total:...
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Total sleep time of college students. A recent survey describes the distribution of total sleep time...
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5.1.36 Question Help In a national survey college students were asked, "How often do you wear...
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In a national survey college students were asked, "How often do you wear a seat belt...
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can you tell me if this project plan makes sense, including the survey? if not, what...
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including the survey? if not, what can I fix?
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Total sleep time of college students. A recent survey describes the distribution of total sleep time among college students as approximately Normal with a mean of 6.78 hours and standard deviation of 1.24 hours.3 Suppose that we select a college student at random and obtain his or her sleep time. This result is a random variable X because, prior to the random sampling, we don't know the sleep time. We do know, however, that in repeated sampling, X will have...
5.1.36 Question Help In a national survey college students were asked, "How often do you wear a seat belt when riding in a car driven by someone else? The response frequencies appear in the table to the right. (a) Construct a probability model for seat-belt use by a passenger. (b) Would you consider it unusual to find a college student who never wears a seat belt when riding in a car driven by someone else? 141 Response Frequency Never Rarely...
In a national survey college students were asked, "How often do you wear a seat belt when riding in a car driven by someone else?" The response frequencies appear in the table to the right. (a) Construct a probability model for seat-belt use by a passenger. (b) Would you consider it unusual to find a college student who never wears a seat belt when riding in a car driven by someone else? Response Frequency Never Sometimes Most of the time...
Outbreak on a Cruise ship Your job is to think about the results and to use the information to make a recommendation to the Cruise line. How can they best get rid of the problem? Part I -Legionnaire's Disease 1) What causes Legionnaire's Disease? Briefly describe the lifestyle of the pathogen Involved in this disease. Why is it such a problem on cruise ships? (2 points) Part II - Sampling the Environment 2A) The Direct Fluorescent Antibody (DFA) Assay was...
Outbreak on a Cruise ship! Your job is to think about the results and to use the information to make a recommendation to the Cruise line. How can they best get rid of the problem? Part 1-Legionnaire's Disease 1) What causes Legionnaire's Disease? Briefly describe the lifestyle of the pathogen involved in this disease. Why is it such a problem on cruise ships? (2 points) Part II - Sampling the Environment 2A) The Direct Fluorescent Antibody (DFA) Assay was used...
can you tell me if this project plan makes sense,
including the survey? if not, what can I fix?
B. Details of regression analysis you plan to conduct a) Target population: (adults) (my) College students (18-34) b) Research variables: (response) BMI and Erercise (erplanatory) c) Rescarch questionHow much exercise affects a person BMI? d) Hypothesis: We expecta 0 positive correlation z negative correlation and predict that it will be D weak & moderate strong We predict this because As one...
Professor Jennings claims that only 35% of the students at Flora College work while attending school. Dean Renata thinks that the professor has underestimated the number of students with part- full-time jobs. A random sample of 81 students shows that 39 have jobs. Do the data indicate that more than 35% of the students have jobs? Use a 5% level of significance. What are we testing in this problem? single proportion single mean (a) What is the level of significance?...
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