A B2B marketing Insider blog of October 7, 2010 examined five currently-used sales closing techniques. Sales scenarios are presented to a sample of 230purchasing executives. Each subject received one of the five closing techniques or a scenario in which no sales close was achieved. After reading the sales scenario, each executive was asked to rate his/her level of trust in the salesperson on a 7-point scale. The following table reports the six treatments employed in the study and the number of subjects receiving each treatment :

No Close: 35

Financial close: 35

Time Line close: 30

Sympathy close: 40

The visual close: 35

Thermometer close: 55

Is the salesperson's level of trust influenced by the choice of closing method? Test at 5% significance level.