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MAT 202 EXAMINING RELATIONSHIPS CHECKPOINT 2 (Straighterline)
EXAMINING RELATIONSHIPS CHECKPOINT 2 Step 1 of 1 Question 1 of 7 Seat belts are supposed to save lives. Here are the results of a 1988 study of accident records conducted by the Florida State Department of Highway Safety. The researchers classified people in vehicles involved in accidents as having worn seat belts or not. The following two-way table gives the results of the study: Accident Nonfatal Seat Belt? Yes No Total 574,895 In this example, it would be appropriate to calculate...
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MAT 202 SAMPLING CHECKPOINT QUIZ (Straighterline)
SAMPLING CHECKPOINT Step 1 of 1 Question 1 of 7 When conducting a survey, it is important to use a random sample: to ensure truthful answers to the survey's questions. so that we can make causal conclusions. to avoid bias and to get a representative sample. to get a significant result. none of the above. Good job! Random selection ensures that the sample is unbiased and represents the population, so that the results of the study can be generalized to the population. Question 2 ...
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MAT 202 DESIGNING STUDIES CHECKPOINT 1 QUIZ (Straighterline)
DESIGNING STUDIES CHECKPOINT 1 Step 1 of 1 Question 1 of 7 The most important reason for the use of random allocation of subjects to the different treatments is: to ensure that each subject in the trial receives the best possible treatment. to guarantee that approximately the same number of subjects is assigned to each treatment group. to protect the experimenters from legal action in the event that the experiment goes drastically awry. to ensure that the different treatment group...
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MAT 202 INTRODUCTION TO PROBABILITY QUIZ (Straighterline)
INTRODUCTION TO PROBABILITY Step 1 of 1 Question 1 of 7 Which of the following is NOT a legitimate probability of an event? 0.999 0.001 1.001 1.0 0.0 Correct. 1.001 is not a legitimate probability of an event since probability cannot be a number that is larger than 1. Question 2 of 7 Suppose that P(A) = 0.03. Which of the following best describes event A? Event A will never occur Event A will not occur more often than it will occur, but it is very likely. Event A is very unl...
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MAT 202 PROBABILITY CHECKPOINT 1 QUIZ (Straighterline)
A family plans to have 3 children. For each birth, assume that the probability of a boy is the same as the probability of a girl. What is the probability that they will have at least one boy and at least one girl? 0.5 0.125 0.75 0.875 none of these Good job! Since the outcomes are equally likely, the easiest way to work this problem is to write out the 8 outcomes in this sample space. In two of these outcomes the genders of all three children are the same (GGG, BBB). The other 6...
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MAT 202 PROBABILITY CHECKPOINT 2 QUIZ (Straighterline)
PROBABILITY CHECKPOINT 2 Step 1 of 1 Question 1 of 11 A fair die is rolled 12 times. Consider the following three possible outcomes: (i) 2 2 2 2 2 2 2 2 2 2 2 2 (ii) 1 1 2 2 3 3 4 4 5 5 6 6 (iii) 4 6 2 1 3 5 2 6 4 3 1 5 Which of the following is true? It is absolutely impossible to get sequence (i). (ii) is more likely than (i). (iii) is more likely than (i) or (ii). The three outcomes are equally likely. Both (B) and (C) are true. Good job! The die is fair. This means that all...
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MAT 202 CONDITIONAL PROBABILITY AND INDEPENDENCE CHECKPOINT 2 (Straighterline)
CONDITIONAL PROBABILITY AND INDEPENDENCE CHECKPOINT 2 Step 1 of 1 Question 1 of 5 These days with the cost of a college education it is important to be able to graduate with a bachelors degree in 4 years. The National Association of Independent Colleges and Universities (NAICU) certainly would encourage students to attend independent schools. They provided the following information: (i) 20% of all college students attend private colleges and universities. (ii) 55% of all college stude...
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MAT 202 RANDOM VARIABLES CHECKPOINT 1 QUIZ (Straighterline)
RANDOM VARIABLES CHECKPOINT 1 Step 1 of 1 The first three questions refer to the following information: The random variable X, representing the number of accidents in a certain intersection in a week, has the following probability distribution: x 0 1 2 P(X=x) 0.20 0.30 0.20 Question 1 of 4 What is the probability that in a given week there will be at most 3 accidents? 0.70 0.85 0.35 0.15 1.00 Good job! P(X ≤ 3) = .20 + .30 + .20 + .15 = .85 or P(X ≤ 3) = 1 - P(X ≤ 4) = 1...
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Post-Midterm | MAT E 202 Questions With Complete Solutions
What is interdiffusion in an alloy? correct answer: In an alloy atoms tend to migrate from regions of high concentrations to regions of low concentrations. What is self-diffusion in a solid? correct answer: In an element solid atoms migrate. What are the conditions for diffusion of one atom from one lattice site to another? correct answer: 1. Must have an empty adjacent site. 2. Atom must have sufficient energy to break bonds with neighbor atoms and cause some lattice distortion during...
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