An experiment is designed to compare the effects of five different advertisements on product perception. A sample of 35 respondents are taken from a larger group. After reading the advertisement all respondents unknowingly received the same pen to evaluate. The respondents are then asked to rate the pen from 1 to 21 on the product characteristics. The score of the ratings for the 35 respondents (seven respondents to each strategy) are as follows Advertising strategies a b c d e 10 9 5 18 15 17 8 6 17 18 18 11 9 21 17 11 10 11 18 23 11 9 5 18 22 13 11 5 19 19 11 11 11 17 22 a. At the 0.05 level of significance, is there evidence of a significant difference in mean rating of five advertisements? b. If appropriate, which aisle advertisements appear to differ significantly in mean ratings? c) Rank the strategies: place the means into the 1st (best), 2nd and so on place. Please type your work from top to bottom starting from the left margin. Keep everything visible as I scroll up or down (do not make me scroll right or left) Solve this problem after you studied the solved example and solved the practice problem Follow the same format as the solved example