Suppose You Estimate the Following the Degree to Which HDTV

Multiple Choice

Suppose you estimate the following the degree to which HDTV sales (in millions of units) are related to price,consumer income,and a time-trend as (p-values in parentheses)

$$\begin{array} { lllll } HD\widehat {TV~ S}ales _ { t } =& 15.43 -& 0.168 \text {Price} +& 0.247 \text {Income } +& 3.52 \text {Time Trend }\\& ( 0.023 ) & ( 0.102 ) & ( 0.028 ) & ( 0.046 ) \\\end{array}$$
You should conclude that the data do

A) not exhibit a time-trend because the estimated coefficient for Price is not statistically significant.
B) exhibit a time-trend because the estimated coefficient for Income is positive and statistically significant.
C) not exhibit a time-trend because the estimated coefficient for the Time Trend is positive.
D) exhibit a time-trend because the estimated coefficient for the Time Trend is statistically significant.