1) Problem #PRAJBQF "PRAJBQF - 239697 - Word Bank: bi..." |
A)
Word Bank:
Refer to the words above to answer the following questions. A word can only be used once. Please answer all fill-ins using lower case letters. A(n)_________________________ observes individuals and measures variables of interest but does not attempt to influence responses. © STATS4STEM.ORG |
Exact Match (case sensitive):
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B)
A(n)_________________________ deliberately imposes some treatment on individuals in order to observe their responses. |
Exact Match (case sensitive):
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C)
A(n)_________________________ is an entire group of individuals that we want information about. |
Exact Match (case sensitive):
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D)
A(n)_________________________ is a part of the population that we actually examine in order to gather information. |
Exact Match (case sensitive):
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E)
A study that systematically favors a certain outcome is_____________________. |
Exact Match (case sensitive):
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F)
A(n)_________________________ attempts to contact every individual in the entire population. |
Exact Match (case sensitive):
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2) Problem #PRAJBQH "PRAJBQH - 239699 - In a table of ran..." |
In a table of random digits ___________________. a. each digit can be any of the 10 digits 0 through 9 b. entries are independent of each other c. each entry is equally likely to be a certain digit d. All of the above © STATS4STEM.ORG |
Multiple Choice:
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3) Problem #PRAJBQJ "PRAJBQJ - 239700 - Voluntary respons..." |
Voluntary response samples are ___________________. a. biased b. unbiased c. required by the government d. required by phone companies © STATS4STEM.ORG |
Multiple Choice:
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4) Problem #PRAJBQG "PRAJBQG - 239698 - Undercoverage is ..." |
Undercoverage is when ___________________. a. an individual chosen for the sample can't be contacted or does not cooperate b. some groups in the population are left out of the process of choosing the sample c. there are too little people in the sample d. there are too little people in the population © STATS4STEM.ORG |
Multiple Choice:
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5) Problem #PRAJBP3 "PRAJBP3 - 239685 - WORD BANK: ..." |
A)
WORD BANK: simulation, experiment, sample, observational study, census, sampling, voluntary, population a. A(n) _________ intentionally influences the response of individuals for observation. © STATS4STEM.ORG |
Exact Match (case sensitive):
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B)
b. A(n) _________ observes individuals and measures variables without influencing the responses of individuals. |
Exact Match (case sensitive):
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C)
c. An example of an alternative method for producing data is a(n) _________. |
Exact Match (case sensitive):
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D)
d. A(n) ________ is an entire group of individuals. |
Exact Match (case sensitive):
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E)
e. A(n) _______ is the part of an entire group of individuals being examined. |
Exact Match (case sensitive):
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F)
f. ________ is the act of studying a part of a group to gain information about the whole. |
Exact Match (case sensitive):
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G)
g. A ________________ attempts to contact each individual in the group. |
Exact Match (case sensitive):
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H)
h. A commercial is aired on morning radio to ask for males between the ages of 35 and 60 to be part of a trial for a test of the new Rogaine product, and in addition complete a survey with their opinions on the product and overall experience. Those who chose to become involved are part of a(n) _______________ response sample. |
Exact Match (case sensitive):
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6) Problem #PRAKFGU "PRAKFGU - 273127 - _________________..." |
___________________ is the arranging of experimental units or subjects into different groups so that the experimental units or subjects are similar to one another. This is done under the belief that the response to the treatment may potentially be different for the different groups. © STATS4STEM.ORG |
Exact Match (case sensitive):
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Hints: |
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7) Problem #PRAKM47 "PRAKM47 - 278532 - Supose you need t..." |
A)
Supose you need to pick a random sample of 5 people from a group of 20 people to participate in an observational study about the number of hours they spend daily using an Apple product. If you will be using a table of random digits, how many digits should each number assigned to every person be? (In other words, how many digits will you read off at a time?) |
Multiple Choice:
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B)
The following is a section of the table of random digits you are using to pick 5 people out of 20. Which two-digit number, corresponding to a person, will be chosen first? |
Exact Match (case sensitive):
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8) Problem #PRAKM48 "PRAKM48 - 278533 - Which of the foll..." |
Which of the following are true? 1. Association and causation are totally unrelated concepts. 2. Strong association always implies causation. 3. In an experiment without flaws in design or technique, strong association implies causation. |
Multiple Choice:
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9) Problem #PRAKM49 "PRAKM49 - 278534 - You are conductin..." |
You are conducting an observational study on the number of hours students spend watching TV at home and wish to break up the sample into smaller groups based on age. This method is called |
Multiple Choice:
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10) Problem #PRAKM5A "PRAKM5A - 278535 - Sampling error co..." |
A)
Sampling error comes from an error in the way you conduct an experiment. |
Multiple Choice:
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B)
The bigger the sample size, the smaller the sampling error. |
Multiple Choice:
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11) Problem #PRAKM5B "PRAKM5B - 278536 - For a study about..." |
For a study about average square footage of private homes in California, a statistician decides to cover his eyes and randomly point to a place on a map of California. He wants to survey all the homes in the county closest to where he points as his sample. Which of the following is true about his experiment? 1. His surveying method incorporates chance. 2. His method will result in a simple random sample. 3. His method of selection could result in bias. |
Multiple Choice:
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12) Problem #PRAKM5C "PRAKM5C - 278537 - A study seeks to ..." |
A study seeks to measure the sprinting speed of blonde people versus that of brunettes. This study should be conducted as a(n) |
Multiple Choice:
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13) Problem #PRAKM5D "PRAKM5D - 278538 - Beantown High Sch..." |
Beantown High School decides to study the effect of class length on student productivity. The results show that the longer a class lasts, the more productive students are. However the results show that students are also more productive when the class is shorter. If all students knew that they were part of a study, the results can be explained by |
Multiple Choice:
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14) Problem #PRAKM5E "PRAKM5E - 278539 - An adult patient ..." |
An adult patient visits a doctor complaining of a persistent headache that he has had for months. The doctor, while filling out the prescription, mistakenly prescribes a very weak form of medicine usually prescribed to newborns. It can be assumed that this medication will have no effect on the adult patient. However, a week passes and the patient approaches the doctor while walking down the street. The patient thanks the doctor for curing his headache. This is an example of: © STATS4STEM.ORG |
Multiple Choice:
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15) Problem #PRAKM5F "PRAKM5F - 278540 - A paper published..." |
A paper published by the Brain Injury Research Institute reported: 1) Over 60 percent of NFL athletes have sustained at least one concussion and approximately one-quarter has had three. 2) In the NFL, retired athletes have a 37 percent higher risk of being diagnosed with Alzheimer’s Disease than men in the general population. An article published in the New York Times reports: 3) Michigan researchers conducted a phone survey in late 2008 in which 1,063 retired players — those who participated from an original random list of 1,625 — were asked questions on a variety of health topics. Players had to have played at least three or four seasons to qualify. Questions were derived from the standard National Health Interview Survey so rates could be compared with those previously collected from the general population, the report said. The Michigan researchers found that 6.1 percent of players age 50 and above reported that they had received a dementia-related diagnosis, five times higher than the cited national average, 1.2 percent. Players ages 30 through 49 showed a rate of 1.9 percent, or 19 times that of the national average, 0.1 percent. Based on these facts, one can claim: A) Concussions cause Alzheimer's Disease. B) There appears to be a relationship between concussions and Alzheimer's Disease and a randomized controlled experiment is the most appropriate method to show causation between the concussions and Alzheimer's Disease. C) There appears to be a relationship between concussions and Alzheimer's Disease and a randomized controlled experiment is needed to show causation between the concussions and Alzheimer's Disease. However, a randomized controlled experiment would most likely never occur due to ethical reasons. D) While experiments are typically required to prove causation, the facts presented overwhelmingly support the claim that concussions cause Alzheimer's Disease. Thus, and experiment is not needed in this specific case. © STATS4STEM.ORG |
Multiple Choice:
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16) Problem #PRAKM5X "PRAKM5X - 278555 - An oil company is..." |
A)
An oil company is running an experiment to determine how little they have to refine the oil before cars start performing poorly. The company is planning to use oil that is refined at the following levels: 80%, 85%, 90%, 95%, and 100%. The study will use 50 cars, so 10 cars will be used for each percentage of refination. The researchers will fill up each car with the same amount of fuel and then test the efficiency of the engine, in miles per gallon, over a set distance. All the cars used are the same model and in the same condition. a) What are the experimental units for this experiment? © STATS4STEM.ORG |
Multiple Choice:
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B)
b) What are the treatments for this experiment? |
Multiple Choice:
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C)
c) What is the response variable for this experiment? |
Multiple Choice:
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17) Problem #PRAKM5Y "PRAKM5Y - 278556 - Ice Cream Flavor:..." |
Ice Cream Flavor: Mint Vanilla Chocolate Coffee Cherry Total
# of Ice Cream Cones Sold: 110 175 165 32 18 500
The table above shows the flavors of ice cream sold at Jerry's Cool Cones in a certain month. Jerry would like to collect a simple random sample of 100 customers to survey customer satisfaction. He is afraid that the customers buying his most popular flavors will have a greater probability of being chosen than the customers buying Coffee or Cherry. What method should Jerry use to collect a simple random sample if he wants to ensure that at least 15 customers of each ice cream flavor are chosen?
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Multiple Choice:
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18) Problem #PRAKM5M "PRAKM5M - 278545 - A drug company wa..." |
A)
A drug company wants to test the effectiveness of one cough syrup A over cough syrup B on children under 12 years old. The experiment will be conducted randomly on the sample population and the researchers will measure how long it takes each child to fully recover from their cough. Cough syrup A is a red liquid while cough syrup B is a purple liquid. Is it possible to conduct this experiment using double-blinding? A double-blind study is when neither the patient nor the researchers administering the treatments know which treatment (in this case, syrup A or B) they are giving/receiving. |
Check All That Apply:
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B)
What is the response variable for this experiment? |
Multiple Choice:
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19) Problem #PRAKN89 "PRAKN89 - 279619 - A school principa..." |
A school principal wishes to conduct a study in his school about bullying. There are 6 grades in his school, grades 7-12. Grades 7 and 8 have much lower enrollment compared to the rest of the school. For the study, the principal wants to research the prevelance and effects of bullying by grade. For this study, the most appropriate method to collect data would be: © STATS4STEM.ORG |
Multiple Choice:
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20) Problem #PRAKN9T "PRAKN9T - 279636 - A patient decides..." |
A patient decides to participate in a research study, but neither the doctor nor the patient knows which treatment is being administered. This can be best described as a: © STATS4STEM.ORG |
Multiple Choice:
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21) Problem #PRAKN92 "PRAKN92 - 279643 - The basic princip..." |
The basic principles of experimental design include: © STATS4STEM.ORG |
Multiple Choice:
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22) Problem #PRAKPMS "PRAKPMS - 279976 - Definition:  ..." |
Definition: Every individual in a population is assigned to one, and only one group. Then a sample of groups is chosen using a simple random sample and then individuals are sampled from the chosen groups. Which sampling method is described by this definition? © STATS4STEM.ORG |
Multiple Choice:
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