Classify the variables as independent or dependent. 1. your grade in math and your test scores b Independent variable: Dependent variable: 2. the spread of the Covid-19 virus and breaking chains of transmission Independent variable: Dependent variable: 3. your habit of reading and your knowledge noltoon Independent variable: Dependent variable: 4. the number of boxes of pizza and its price Independent variable: Dependent variable: gidanoalor 5. the internet plan and internet bill of a household Independent variable: Dependent variable: oa onola svil on
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- A researcher selected an all-girls high school to study math achievement by comparing text lessons vs. visual lessons (the independent variable) and used final exam scores as the dependent variable. He arranged for text lessons in the Fall and visual lessons in the Spring. What is confounded with what? a. type of lesson with season of year b. Girls with exam scores and season of year c. type of lesson with exam scores d. season of year with exam scoresA) With Monthly Construction Permits as the independent variable, the carpet sales forecast if 20 construction permits for new homes are filed is: a. 7,400 yards b. 12,160 yards c. 24,310 yards d. 38,960 yards B) Using correlation coefficient as the criterion, the better forecasting model is: a. The one with Time Period as the independent variable b. The one with Monthly Construction Permits as the independent variableA popular fast food chain wants to open an outlet in a particular district. The research department collected some data from the district. Among the variables collected were i. the number of persons who buy gasoline during a particular period ii. the number of business places in the district iii. the types of businesses in the district iv. the area of land used for each house in the neighborhood v the days of late closing of the businesses vi the number of students from the two schools in the area who wait for the bus near the proposed site of the outlet. SELECT ALL THE QUALITATIVE VARIABLES
- A 2012 suvey conducted by Idea Works provided data showing the percentage of seats avail- able when customers try to redeem points or miles for free travel. For each airline listed, the column labeled 2011 Percentage shows the percentage of seats available in 2011 and the column labeled 2012 shows the correponding percentage in 2012 (The Wall street Journal, May 17, 2012). Develop a scatter diagram with 2011 Percentage as the independent variable. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? Develop the estimated regression equation. Test for a significant relationship. Use α = 0.05. Did the estimated regression equation provide a good fit?A company provides maintenance service for water-filtration systems throughout southern Florida. Customers contact the company with requests for maintenance service on their water-filtration systems. To estimate the service time and the service cost, the company's managers want to predict the repair time necessary for each maintenance request. Hence, repair time in hours is the dependent variable. Repair time is believed to be related to three factors, the number of months since the last maintenance service, the type of repair problem (mechanical or electrical), and the repairperson who performed the service. Data for a sample of 10 service calls are reported in the table below. Repair Timein Hours Months SinceLast Service Type of Repair Repairperson 2.9 2 Electrical Dave Newton 3.0 6 Mechanical Dave Newton 4.8 8 Electrical Bob Jones 1.8 3 Mechanical Dave Newton 2.5 2 Electrical Dave Newton 4.9 7 Electrical Bob Jones 4.6 9 Mechanical Bob Jones 4.8 8 Mechanical Bob…A researcher is interested in comparing the effectiveness of three popular diets for weightloss: The Paleo diet, Keto, and the Atkins diet. She randomly assigns participants to follow one of the three diet trends for 6 months, and then compares the amount of weight lost in each group. What is the Independent Variable and the Dependent Variable?
- A researcher is trying to develop an improved version of cognitive behavioral treatment (deluxe CBT) for depression. He recruits 50 patients with a depression diagnosis and randomly assigns them to two groups (25 patients in each group). One group gets the new treatment (deluxe CBT) and the other group gets standard treatment. He then measures their depression symptoms one month later. a. What type of research design (correlational vs. experimental) is this? [Be as specific as possible with the name.] b. What is the independent variable and the dependent variable? c. Is this a good or bad study design for making statements about causality? If yes, why? If no, what design would be better?A researcher is interested in examining whether the location that a person lives is related to the number of hours that they spend on the internet each week. The researcher collected data from a sample of 30 participants who were classified in one of three groups: (1) 10 people who live in an urban setting, (2) 10 people who live in a suburban setting, and (3) 10 people who live in a rural setting. Each participant reported the number of hours they spend on the internet in a typical week (the dependent variable). The researcher found the following descriptive statistics: Urban participants reported an average of 8.9 hours of internet use per week with a standard deviation of 2.77. Suburban participants reported an average of 12.7 hours of internet use per week with a standard deviation of 4.88. Rural participants reported an average of 9.8 hours of internet use per week with a standard deviation of 2.82. Using the data that was collected, the researcher found the following: The…A researcher is interested in examining whether the location that a person lives is related to the number of hours that they spend on the internet each week. The researcher collected data from a sample of 30 participants who were classified in one of three groups: (1) 10 people who live in an urban setting, (2) 10 people who live in a suburban setting, and (3) 10 people who live in a rural setting. Each participant reported the number of hours they spend on the internet in a typical week (the dependent variable). The researcher found the following descriptive statistics: Urban participants reported an average of 8.9 hours of internet use per week with a standard deviation of 2.77. Suburban participants reported an average of 12.7 hours of internet use per week with a standard deviation of 4.88. Rural participants reported an average of 9.8 hours of internet use per week with a standard deviation of 2.82. Using the data that was collected, the researcher found the following: The…
- A researcher is interested in examining whether the location that a person lives is related to the number of hours that they spend on the internet each week. The researcher collected data from a sample of 30 participants who were classified in one of three groups: (1) 10 people who live in an urban setting, (2) 10 people who live in a suburban setting, and (3) 10 people who live in a rural setting. Each participant reported the number of hours they spend on the internet in a typical week (the dependent variable). The researcher found the following descriptive statistics: Urban participants reported an average of 8.9 hours of internet use per week with a standard deviation of 2.77. Suburban participants reported an average of 12.7 hours of internet use per week with a standard deviation of 4.88. Rural participants reported an average of 9.8 hours of internet use per week with a standard deviation of 2.82. Using the data that was collected, the researcher found the following: The…A researcher is interested in studying how the number of books parents read to their children can influence a child's reading skills in kindergarten. She randomly assigns families with 5 year old children to either read their child 3 books per day, 2 book per day, or 1 book per day for the first 2 months of kindergarten. They then measure the children's reading ability. What is the independent variable?In an experiment, the purpose for manipulating the independent variable is to help? A. Establish the direction of the relationship by showing that the dependent variable changes when you manipulate the independent variable B. Ensure that any effects of selection or other randomization failures are minimized C. Establish the direction of the relationship and help eliminate the third variable problem D. Eliminate the third variable problem because you decide when to manipulate rather than waiting for the variable to change