Interactive Statistics

4.9 Thinking of You An overwhelming number of cards are bought to celebrate Christmas and Valentine's Day. The accompanying graph shows how many cards were exchanged on various holidays. (Source: The New York Times, May 15, 1995, page F9.) 1993 Greeting Card Sales Figures 2,300 Christmas million Valentine's Day 900 Mother's Day 155 Father's Day 102 Thanksgiving 42 New Year's Day 10 (a) For Valentine's Day, there were 900 million in card sales, while for Christmas there were over 2.5 times that level (namely, 2300 million). However, the length of the Christmas bar is not 2.5 times the length of the Valentine's Day bar. Explain why this is the case (notice the width of the bars). (b) Display the sales-figures data for greeting cards with a bar graph using bars of equal widths