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

Multiple Choice

The typing speeds (in words per minute) and reading speeds (in words per minute) of nine randomly selected secretaries were recorded.Use the regression analysis and summary statistics provided below to determine a 90% confidence interval for the average reading speed of a secretary whose typing speed is 71. $$\begin{array} { l c l l c } \text { Variable } & \text { Count } & \text { Mean } & \text { StdDev } & \text { Range } \\\text { Typing speed } & 9 & 60.44444 & 3.3587 & 35 \\\text { Reading speed } & 9 & 501.8889 & 33.42298 & 297\end{array}$$ Dependent variable is: Reading speed R-squared = 12.385%
S = 100.3348 with 9 - 2 = 7 degrees of freedom $$\begin{array} { l l l l l } \text { Variable } & \text { Coefficient } & \text { SE(Coeff) } & \text { t-ratio } & \text { P-value } \\\text { Constant } & 290.2093 & 215.4116 & 1.347231 & 0.219884 \\\text { Typing speed } & 3.502052 & 3.520579 & 0.994737 & 0.352998\end{array}$$

A) 330.4 to 747.3 words per minute
B) 444.1 to 633.6 words per minute
C) 532.2 to 545.5 words per minute
D) 405.9 to 450.9 words per minute
E) 326.4 to 751.3 words per minute