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University of Idaho *

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150

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Statistics

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Jan 9, 2024

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12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 1/6 Module 1 Quiz Due Aug 29 at 11:59pm Points 15 Questions 15 Time Limit None Instructions Attempt History Attempt Time Score LATEST Attempt 1 10 minutes 15 out of 15 Correct answers are hidden. Score for this quiz: 15 out of 15 Submitted Aug 28 at 6:08pm This attempt took 10 minutes. Welcome to the Module 1 quiz. This quiz will comprise of 15 questions. You will have 1 attempt. No consulting with other people or resources while taking this quiz. 1 / 1 pts Question 1 An observational study uses treatments and some form of blinding. True False 1 / 1 pts Question 2 A ___________ is made to appear as if it is the treatment in an experiment and is given to the control group.
12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 2/6 placebo 1 / 1 pts Question 3 In a statistical study, the complete set of people or things being studied is called the _________________ population 1 / 1 pts Question 4 Sample statistics are specific numbers that describe characteristics of the population. True False 1 / 1 pts Question 5 Researchers are trying to find out the average amount of money that students at the University of Idaho spend on food each week. They randomly sample 100 students using simple random sampling. They find that the students in the sample spend an average of $75 a week on food. Please find and match the correct answer for the population, sample, raw data, and sample statistic. Population
12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 3/6 Students at the Universi Sample The 100 randomly selec Raw Data The money each individ Sample Statistic The $75 dollars that the 1 / 1 pts Question 6 The __________________ in a statistical study is used to describe the range of values likely to contain the population parameter. confidence interval 1 / 1 pts Question 7 Which one of the following is NOT one of the basic steps of a statistical study. Collect raw data and summarize Choose a representative sample Gather Sample to match known population parameter. Make inferences about population of interest
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12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 4/6 1 / 1 pts Question 8 A ____________ is a collection of data from every member of a population. census 1 / 1 pts Question 9 A statistical study suffers from __________ if its design or conduct tends to favor certain results. bias 1 / 1 pts Question 10 A researcher is doing quality assurance for a drill factory. in an attempt to gather a representative sample, the researcher takes every 20th drill from the conveyor belt to test the quality of the drill. What type of sampling did the researcher use. systematic sampling 1 / 1 pts Question 11
12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 5/6 In a different drill manufacturing company, another researcher is sampling drills for quality control reasons. This drill factory packages drills into boxes to ship around the nation to a variety of stores. The factory has 50 boxes, each box containing 10 drills, ready to ship. To get a sample of drills to test, the researcher selects 5 of the 50 boxes at random and then tests every drill within the 5 selected boxes. What type of sampling did the researcher use? cluster sampling 1 / 1 pts Question 12 A researcher is doing an experiment and selects participants in advance to be in either the control group or the treatment group. He does not tell the participants who is in which group, but he keeps a list of who is in what group so that he can keep track of that information. What type of blinding was used for the experiment, if any? No blinding was used Single-blind Double-Blind 1 / 1 pts Question 13 What type of data does a retrospective study use? Data from the past Data collected all at once in the present
12/11/23, 6:53 PM Module 1 Quiz: F23 STAT153-02 https://canvas.uidaho.edu/courses/23232/quizzes/68030 6/6 Data from the future 1 / 1 pts Question 14 You are conducting an experiment to see if a contact with a new type of paint causes a rash. What type of blinding should you use, if any? None should be used Single-Blind Double-blind 1 / 1 pts Question 15 A study suffers from ____________ if the effects of different variables are mixed so that we cannot determine the specific effects of the variables of interest. confounding Quiz Score: 15 out of 15
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