The Reading Speeds (In Tens of Words Per Minute)and Typing

question 38

Multiple Choice

The reading speeds (in tens of words per minute) and typing speeds (in words per minute) of nine randomly selected secretaries were recorded. Dependent variable is: Reading speed
R-squared = 97.9521%
S = 2.094847 with 9 - 2 = 7 degrees of freedom $$\begin{array} { l c l l l } \text { Variable } & \text { Coefficient } & \text { SE(Coeff) } & \text { t-ratio } & \text { P-value } \\\text { Constant } & - 40.738 & 5.820749 & - 6.99876 & 0.000212 \\\text { Typing Speed } & 2.260433 & 0.123535 & 18.29785 & 3.61 \times 10 ^ { - 7 }\end{array}$$

• A)Reading speed = -40.738 + 2.260433 × Typing speed; We estimate that the reading speeds for these secretaries increase about 2.260433 words per minute for each 10 word per minute increase in their typing speed.
• B)Typing speed = -40.738 × Reading speed + 2.260433; We estimate that the typing speeds for these secretaries increase about 2.260433 words per minute for each 10 word per minute increase in their reading speed.
• C)Reading speed = -40.738 + 2.260433 × Typing speed; We estimate that the reading speeds for these secretaries increase about 22.60433 words per minute for each 1 word per minute increase in their typing speed.
• D)Typing speed = -40.738 + 2.260433 × Reading speed; We estimate that the typing speeds for these secretaries decrease about 40.738 words per minute for each 10 word per minute increase in their reading speed.
• E)Typing speed = -40.738 × Reading speed + 2.260433; We estimate that the typing speeds for these secretaries decrease about 40.738 words per minute for each 10 word per minute increase in their reading speed.

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