Math 225n week 8 ass - Study guides, Class notes & Summaries

MATH 225N Week 8 Assignment Correlation and Causation.

MATH 225N Week 8 Assignment Coefficient of Determination.

MATH 225N Week 8 Assignment Predictions Using Linear Regression.

MATH 225N Week 8 Assignment Predictions Using Linear Regression

1. Question: An economist is studying the link between the total value of a country's exports and that country's gross domestic product, or GDP. The economist recorded the GDP and Export value (in millions of $'s) for 30 nations for the same fiscal year. This sample data is provided below. Use Excel to calculate the correlation coefficient r between the two data sets. Round your answer to two decimal places. 2. Question: The table below shows data on annual expenditure, x(in dollars), on recr...

1. Question: Janet is studying the relationship between the average number of minutes spent exercising per day and math test scores and has collected the data shown in the table. The line of best fit for the data is yˆ=0.46x+66.4. Assume the line of best fit is significant and there is a strong linear relationship between the variables. Minutes Test Score (a) According to the line of best fit, what would be the predicted test score for someone who spent 23 minutes exercising? Round your ans...

1. Question: The table shows data collected on the relationship between the time spent studying per day and the time spent reading per day. The line of best fit for the data is yˆ=0.16x+36.2. Assume the line of best fit is significant and there is a strong linear relationship between the variables. Studying (Minutes) 50, 70,90,110 Reading (Minutes) 44,48,50,54 According to the line of best fit, what would be the predicted number of minutes spent reading for someone who spent 67 minutes st...

MATH 225N Week 8 Assignment: Correlation Questions-Answers 1. Question: A scientific study on gerbil population growth results in the data below…. The least squares regression line modeling this data is given by yˆ=13.3 5.567x. What is the slope of the regression line? Round your answer to three...

MATH 225N WEEK 8 ASSIGNMENT

MATH 225N Week 8 Assignment Coefficient of Determination A medical experiment on tumor growth gives the following data table……… The least squares regress