Question: A Sales and Marketing Management survey included 651 sales managers, and 94% of them said that being a sloppy dresser can make a sales representative's job more difficult. For that same group, 75% said that being an unstylish dresser can make a sales representative's job more difficult.

1. Construct a 90% confidence interval estimate of the percentage of sales managers who say that being a sloppy dresser can make a sales representative's job more difficult.
2. Construct a 90% confidence interval estimate of the percentage of sales managers who say that being an unstylish dresser can make a sales representative's job more difficult.
3. Given that sample proportions naturally vary, can we conclude that when sales managers state reasons for a sales representative's job becoming more difficult, the percentage is higher for sloppy dressing than for unstylish dressing? Why or why not?

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