Aproducer of outdoor clothing used a focus group to obtain information about the demand for fleece jackets with built-in battery operated warming panels. at prices of $100, $90, $80, $70, $60, and $50, the focus group demanded 23, 31, 40, 44, 48, and 60 jackets, respectively. is price statistically significantly different from zero at the 0.05 level of significance?   (hint: use excel's linest tool or, if you have the window's version, the regression tool.) the price coefficient's standard error is seequals nothing (enter your response rounded to three decimal places.) and t-statistic is tequals nothing. (enter your response rounded to three decimal places and include a minus sign.)