Week-3-codes

Correlational designs have one independent variable and one dependent variable  true or false?

Reading is fundamental to a teenager's ability to perform well in school. Assume a researcher is interested in the ability of the number of books read over the summer to predict ACT Reading scores. Using a random sample of 10 random high school students the researchers recorded the number of books read over the summer and the students' ACT Reading scores. Books Read (X) ACT Score (Y) (X- Xmean) (Y - Ymean) (X-Xmean)(Y-Ymean) (X-Xmean)? (Y - Ymean)? 2 16 -5.4 -14.9 81 29 221 2 19 -5.4 -11.9 64 29 141 3 17 -4.4 -13.9 61 20 192 4 25 -3.4 -5.9 20 12 34 21 -3.4 -9.9 34 12 97 24 -1.4 -6.9 10 2 47 6 21 -1.4 -9.9 14 2 97 8 24 0.6 -6.9 -4 47 7 27 -0.4 -3.9 2 15 10 22 2.6 -8.9 -23 7 78 Total 52 216 259.1 113.3 969.3 МEAN 7.4 30.9 a. Identify the regression line using the number of books read to predict ACT Reading score. Use a = .05 to evaluate the quality of the prediction of the regression line. b. What is the predicted ACT Reading score when 5 books are read?

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Use the table to answer the question In Equation 2, what variables are NOT significantly related to the dependent variable? The dependent variable is health

What are Dependent Variables?

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 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 Time Months Since in Hours Last Service 2.9 3.0 4.8 1.8 2.5 4.9 4.2 4.8 4.4 4.5 2 6 8 3 2 7 9 8 4 6 Type of Repair Repairperson Electrical Mechanical Electrical Mechanical Electrical Electrical Mechanical Mechanical Electrical Electrical Dave Newton ŷ = X Check which variable(s)/term(s) should be in your…

Why would the male lifespan not be the dependent variable?

which scatter plot shows a non linear association between the two variables

College GPA and Salary. Do students with higher college grade point averages (GPAs) earn more than those graduates with lower GPAs (CivicScience)? Consider the college GPA and salary data (10 years after graduation) provided in the file GPASalary. Develop a scatter diagram for these data with college GPA as the independent variable. PLEASE MAKE SIMPLE GRAPH. What does the scatter diagram indicate about the relationship between the two variables? Use these data to develop an estimated regression equation that can be used to predict annual salary 10 years after graduation given college GPA. At the .05 level of significance, does there appear to be a significant statistical relationship between the two variables? GPA Salary 2.21 71000 2.28 49000 2.56 71000 2.58 63000 2.76 87000 2.85 97000 3.11 134000 3.35 130000 3.67 156000 3.69 161000

My first variable is Social media use. My second variable is stress among adults 18-35

What are Independent variables?

MAPEH-10-Q3-Week-4.pdfX Filipino-10-Q3-Week-4.pdf X TLE CSS 10 Quarter3 Week X ESP-10-03-Weeks-3-4.pdf Math 10 Q3 Week 5.p sers/L%20E%2ON%200%20V%200%20-%20P%20C/Downloads/Math%2010%20Q3%20Week%205.pdf Facebook - + E| D Page view A Read aloud | Draw E Highlight b. 362 880 b. 181 440 C. 60 480 d. 30 240 3. Abby is selecting 3 desserts from 10 possible choices displayed on the dessert cart at a restaurant. How many selections are there? b. 120 b. 240 C. 360 d. 720 4. A mother, a father, and their 4 children will dine in a restaurant with circular tables. In how many ways can the family be seated in a table? b. 24 b. 56 C. 120 d. 720 5. From a Grade 10 class of 28 students, five representatives are to be chosen for academic competition. In how many ways can students be chosen to represent their class? b. 12 285 b. 19 565 C. 49 140 d. 98 280 6. Mr. Reyes has a vault with four-digit combination lock. He can set the combination himself. He can use the digits 0 - 9. Each digit can be used…

Suppose that in a research it was discovered that those who majored in math, engineering, or computer science scored higher on tests measuring "problem-solving" ability at the end of 4 years of college than did those students who did not major in these fields.    What is the dependent variable in this study? Is the dependent variable clearly defined?

Tire pressure (psi) and mileage (mpg) were recorded for a random sample of seven cars of thesame make and model. The extended data table (left) and fit model report (right) are based on aquadratic model   What is the predicted average mileage at tire pressure x = 31?

Explain the Chain Rule for two independent Variables ?