The Test Scores of 6 Randomly Picked Students and the Numbers

question 58

Multiple Choice

The test scores of 6 randomly picked students and the numbers of hours they prepared are as follows: $$\begin{array} { | r | r r r r r r } \hline \text { Hours } & 5 & 10 & 4 & 6 & 10 & 9 \\\hline \text { Score } & 64 & 86 & 69 & 86 & 59 & 87\end{array}$$ The equation of the regression line is $$\hat { \mathrm { y } } = 1.06604 x + 67.3491$$ 67.3491. Find the coefficient of determination.

• A) 0.0503
• B) -0.2242
• C) 0.2242
• D) 0.6781

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Definitions:

Variable++

Variable++ denotes the increment operator in programming languages like C and C++, which increases the value of the variable by one.

Cast Operator

A unary operator that forces one data type to be converted into another data type.

Assignment Operator

In programming, an operator that assigns a value to a variable, commonly represented by the "=" symbol.

Lvalue

A location value, representing an object that occupies some identifiable location in memory (such as a variable), which can be assigned a value.