7.29Rudeness and its effect on onlookers.Many believe that an uncivil environment has a negative effect on people.A pair of researchers performed a series ofexperimentsto test whether witnessing rudeness and disrespect affects task performance.¹¹In one study,34 participants met in small groups and witnessed the group organizer being rude to a "participant" who showed up late for the group meeting.After the exchange,each participant performed an individual brainstorming task in which he or she was asked to produce as many uses for a brick as possible in 5 minutes.The mean number of uses was 7.88 with a standard deviation of 2.35.

1. (a)Suppose that prior research has shown that the average number of uses a person can produce in 5 minutes under normal conditions is 10.Given that the researchers hypothesize that witnessing this rudeness will decrease performance,state the appropriate null and alternative hypotheses.
3. (b)Carry out the significance test using a significance level of 0.05.Give theP-value and state your conclusion.