The data table found below contains the listed prices and weights of the diamonds in 20 rings offered for sale in a newspaper in a foreign city. The prices are in local dollars with the weights in carats. Complete parts (a) through (9) below. Click the icon to view the data table. (Round to three decimal places as needed.) What is the correct interpretation of r2? O A. The value of r? is the standard deviation of the residuals. O B. The value of r? is the fraction of the variation accounted for by the least squares regression line. OC. The value of r? is the fraction of the variation not accounted for by the least squares regression line. O D. The value of r? is the average residual. What is the correct interpretation of s,? O A. The value of s, is the average residual. O B. The value of s̟ is the fraction of the variation accounted for by the least squares regression line. OC. The value of s̟ is the standard deviation of the residuals. O D. The value of se is the fraction of the variation not accounted for by the least squares regression line.

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.