CSCI N207 Quiz Four Answers

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Ivy Tech Community College, Indianapolis *

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Computer Science

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Feb 20, 2024

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CSCI N207 Quiz Four Answers

Question What does it mean if R value is +2.6? Answer There was an error when calculating the correlation. Moderate correlation Strong correlation Weak correlation Question What s the R value for "perfect negative"? Answer Question Which of the following R value indicates no correlation? +1 Answer o

Question :t Answer Which of the following task can be best achieved using a multivariate analysis? Display the amount of potatoes consumed last year and this year. Seeif Colorado has more women employees or more men employees. Compare the GPAs of computer science majors and the GPAs of music majors. Check if discounts promote sales. Question :t Answer Anegative correlation indicates that as the values of one variable increase, the values of another variable decrease. True False Question :t Answer What type of chart is used to illustrate a multivariate analysis? scattered chart line chart with two data series pie chart column chart with two data series

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Question What does an R value of -0.83 indicate? Answer Strong negative correlation Strong positive correlation Moderate positive correlation Weak negative correlation Question Which R value best indicates this correlation description? "The data clearly shows that the more people go out travelling, the more expensive the airplane tickets are:" :Answer 091 Question Which of the following describes m in a linear equation? y-intercept : Answer slope independent variable dependent variable

Question If "age" is found to be correlated to "online game purchasing",in predicting how many games a person would purchase if the person's age is 29, "age" is considereda dependent variable Answer independent variable Question Inalinear equation, what s true about b? It shows the the slope of the line. Answer It shows where the line crosses the y axis. It shows where the line crosses the x axis. It must be a positive value. Question Give two points, (3, 6) and (1, 8), what is the value of m? Answer 1

Question If the new x s not included in the data set, but is within the range of the data set, using the linear equation to predit ay value is called Answer _ interpolation extrapolation Question The value for the coeffcient of determination will be between -1and 1. True Answer Fase Question The closer the R squared value is to 1, the more confident the prediction is. Answer True False Question Which of the following is an Excel function to find the R value? COVAR Answer CORREL R VAR

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Question Aperfect negative R value indicates no correlation between two variables. Answer Fase Question Regression analysis involves finding the equation for a line where about half of the data points are above the line and another half below the line. Answer True False Question Which of the following is an Excel function that finds the b value in a linear regression analysis? TREND SLOPE Aosueg INTERCEPT Question If data points on a scatter chart shows a strong pattern, the R value will be close to 0. Answer Fase

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