題組內容

四、 A retailer of satellite dishes would like to know the impact of advertising on her sales. For 8 months she records the number of ads run in the newspaper and the number of sales:

  1. Calculate and <strong>interpret</strong> the least square estimates of \( \beta_0 \) and \( \beta_1 \) for the linear model \( y = \beta_0 + \beta_1x + \varepsilon \). (10%)