Question

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Elena Martin is campaigning for the city council. She has two types of lawn signs to distribute: large ones and small ones. She wonders if the size of the sign affects residents willingness to display the signs on their property. Early in the campaign, her staff obtain a list of homeowners in cach of the city's 10 voting districts who are registered in her and presumably not averse to advertising their support for her. The staff randomly selects homeowners in each of the 10 districts, to some of whom they send large signs and to others, small signs. Two weeks later, staff members drive by each home to which they sent the signs to record whether or not the sign is being displayed Refer to question 4 on page 242 for the table. Calculate t and compare it with the tabled critical t at the 01 a level. Can you reject the null hypothesis? O Yes O No Not enough information O Both QUESTION 16 4 points Save Answer An Internet provider wonders if its cable Internet customers are significantly more satisficd surveys 12 customers currently receiving free e-mail with their cable Internet and 12 customers currently receiving free basic TV with their cable Intemet. Satisfaction scores range from I to 10 based on answers to the survey questions. a two-tailed t test at the 05 a level. Are the customers significantly more satisfied with one package or the other? O Reject the null hypothesis O Do not reject the null hypothesis O Not enough information O Both Here are the scores. Conduct QUESTION 17 4 points Save Answer An Internet provider wonders if its cable Internet customers are significantly more satisfied with one or the other of its two packages -free e-mail or free basic TV. The company surveys 12 customers currently receiving free e-mail with their cable Internet and 12 customers currently receiving free basic TV with their cable Intemet. Satisfaction scores range from 1 to 10 based on answers to the survey questions. Conduct a two-tailed t test at the .05 α level. Are the customers significantly more satisfied with one package or the other? O Reject the null hypothesis O Do not reject the null hypothesis O Not enough information O Both QUESTION 18 4 points Save Answer A research conducts a one-tailed two-sample t test on 32 subjects (16 subjects in each group) and finds that t 2.182. How many degrees of freedom are there in this study? O 31 O 30 O 29

Answer 1

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