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Design of experiments
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In a well-designed experiment, there is only one systematic difference between the conditions. This difference is manipulated by the experimenter and is called the ____________. a. between-subject variable b. within-subject variable c. dependent variable
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Design of experiments
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Three new brands of fertilizer that a farmer can use to grow crops just came on the market. Before deciding which brand he should use permanently for all crops, a farmer decided to experiment for one
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Design of experiments
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A new research study proves that Smarties, Canada’s favorite chocolate candy, is as addictive as cocaine. Cocaine is a psychedelic drug that is known to be highly addictive. To examine if Smarties are as addictive as cocaine, Professor Zucker recruited pa
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Design of experiments
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Why do we need to use dummy variables in statistics?
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Design of experiments
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Jenny wants to determine if a new brand name washing detergent is better than her old detergent. She washes ten dirty t-shirts with the new washing detergent and ten dirty t-shirts with the old detergent. Identify the dependent and independent variables f
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Design of experiments
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A Minitab ANOVA from a randomized complete block experiment output is shown below. (a). Fill in the blanks. You may give bounds on the P
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Design of experiments
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When a plant is placed on a window sill, it grows faster than when it is placed on a coffee table in the middle of the living room. Is this observation testable? If not, explain why not. If so, determine the following. a. Write a hypothesis. b. What are t
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Design of experiments
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During a recent year, the average cost of making a movie was $54.8 million. This year, a random sample of 15 recent action movies had an average production cost of $62.3 million with a variance of $ 8 million. a) At the 0.05 level of significance, can it
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Design of experiments
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The Crown Bottling Company has just installed a new bottling process that will fill 13-ounce bottles of the popular Crown Classic Cola soft drink Both overfilling and underfilling bottles are undesira
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Design of experiments
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Describe three ways in which Walmart or Target could use the Analysis of Variance technique to help analyze retail customer purchasing behavior. Include the necessary technical assumptions that would
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Design of experiments
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In Relief from Arthritis published by Thorsons Publishers, Ltd., John E. Croft claims that over 40% of those who suffer from osteoarthritis receive measurable relief from an ingredient produced by a p
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Design of experiments
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Last year’s mean hourly wage (in dollars) for all hospital clerical workers in a large state was 7.5. An administrator for the state believes that this year’s mean hourly wage for hospital clerical workers is greater than last year’s mean.
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Design of experiments
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A company is willing to renew its advertising contract with a local radio station only if the station can prove that more than 20% of the residents of the city have heard the ad and recognize the comp
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Design of experiments
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In science, a hypothesis is: a. an educated guess. b. the current best explanation. c. a statement of fact. d. based upon one or several proven hypotheses. e. both b and d
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Design of experiments
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The Willow Run Outlet Mall has two Haggar Outlet Stores, one located on Peach Street and the other on Plum Street. The two stores are laid out differently, but both store managers claim their layout maximizes the amounts customers will purchase on impulse
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Design of experiments
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The following statement appeared on a box of Tide laundry detergent Individual packages of Tide may weigh slightly more or less than the marked weight due to normal variations incurred with high speed packaging machines, but each day’s production of
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Design of experiments
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A current trend among professional baseball players is wearing braided titanium necklaces. The titanium reportedly regulates the flow of energy through the body. The player wearing the necklace then improves strength, tires less, and recovers more quickly
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Design of experiments
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In spectrophotometry experiment, students add different amounts of dye to the same amount of water. Students then measure the absorbance of each solution. What is the dependent variable in this experiment? A. Amount of water B. Concentration of the solut
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Design of experiments
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Identify the independent and dependent variables and write a function rule to describe each situation. a. The amount of money you earn mowing lawns at $15 per lawn? b The profit you make by selling fl
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Design of experiments
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How do offshore tax shelters work?
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Design of experiments
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Stock market investors are always seeking the “Holy Grail,” a sign that tells them the market has bottomed out or achieved its highest level. There are several indicators. One is the buy signal developed by Gerald Appel, who believed that a bottom has bee
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Design of experiments
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If you contrast case control study and randomized clinical trial, which could be the advantages and disadvantages of each one?
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Design of experiments
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National Bearings manufactures bearings at plants located in Portland Oregon, Houston Texas, and Jacksonville Florida. To measure employee knowledge of Total Quality Management (TQM), six employees were randomly selected at each plant and tested. The test
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Design of experiments
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The Consumer Reports Restaurant Customer Satisfaction survey is based upon 148, 599 visits to full-service restaurant chains. One of the variables in the study is meal price, the average amount paid p
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Design of experiments
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If we collect experimental data on alcohol consumption from the same 100 individuals before and then after a course on the dangers of overdrinking, we are using a: A. randomized comparative design B. post-test only design C. matched pairs design D. contro
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Design of experiments
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Describe the four phases of clinical trials.
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Design of experiments
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In the following research question, what is the independent variable? Can diabetics on oral antiglycemic medications achieve better control of blood sugar, as measured by HgbA1C, if they are taught to meditate and do this on a daily basis? a. Oral antigly
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Design of experiments
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When investigating the relationship between the power produced by an electrical heater and the time taken to heat a beaker of water, why is the time the independent variable and plotted on the x-axis when the power produced is what the experimenter contro
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Design of experiments
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USA Today reported that \approx imately 25% of all state prison inmates released on parole become
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Design of experiments
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A manufacturer of television sets is interested in the effect on tube conductivity of four different types of coating for color picture tubes. A completely randomized experiment is conducted and the f
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Design of experiments
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A polygraph (lie detector) is an instrument used to determine if the individual is telling the truth. These tests are considered to be 88% reliable. In other words, if an individual lies, there is a 0
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Design of experiments
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If a research question focused on whether students who got at least 7 hours of sleep the night before a big exam did better on that exam than students who got less than 7 hours of sleep the night before, what would be the independent variable and the depe
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Design of experiments
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A clinical trial testing two research hypotheses at the same time is called which of the following? a. Run-in-design b. Factorial design c. Randomized matched pair design d. Quasi-experimental design
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Design of experiments
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A hypnosis program designed to help individuals quit smoking claims a 57 % success rate. A consumer watch group suspects that this claim is high and randomly selects 50 individuals who have completed the program in order to conduct a hypothesis test. What
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Design of experiments
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Consider the following variable: Student IQ ratings (Assume that the range is 69-130). Classify the variable as either Discrete or Continuous, qualitative or quantitative. Also, classify its scale as nominal, ordinal, interval or ratio.
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Design of experiments
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A nutritionist would like to test whether green coffee extract will impact weight loss in middle-aged women. Which of the following is the best hypothesis for the experiment? a. Middle age women taking green coffee extract pills daily will lose more weigh
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