4) Which of the following is a reliable and unbiased method to rate the performance of smartphones? a. Survey users of various smartphones b. Have the Marketing Directors from a variety of smartphone manufacturers test the phones. CHire an independent firm like Consumer Reports to test the phones d Evaluate advertisements for the most impressive sales pitch. 5) Among Division College Football head coaches, the mean salary is $1,600,000 and the median salary is $1,450,000. In addition, the lowest salary is $250,000 and the highest salary is $5,650,000. If a frequency graph of head coach salaries is generated, which shape should be expected? a. Symmetric b. Right skewed Left-skewed I 6) Which statement is correct in comparing the two distribution curves shown? {a} (b) a) has lets variation than (b) a) has more variation thao (b) al is more skewed than (b)