An Internet provider wonders if its cable Internet customers

| September 12, 2019


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 Internet.  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? (answer choices: reject, do not reject, not enough information or both)?

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 Internet.  Satisfaction scores range from 1 to 10 based on answers to the survey questions.  Here are the scores. Conduct a two-tailed t test at the .05 α level.  Are the customers significantly more satisfied with one package or the other? (answer choices: reject, do not reject, not enough information or both)?

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 each of the city’ s 10 voting districts who are registered in her political party 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.

Large sign: 34, 41, 30, 32, 28, 31, 40, 27, 26, 22

Small sign: 41, 44, 36, 38, 29, 47, 49, 39, 43, 37

Calculate t and compare it with the tabled critical t at the .01 α level.  Can you reject the null hypothesis?(answer choices: yes, no, both, or not enough information)

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 each of the city’s 10 voting districts who are registered in her political party 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. Here are the percentages of homes displaying the signs in each district:

Large signs: 6, 7, 5, 7, 8, 6, 10, 9, 6, 7, 7, 5, 7

Small Signs: 7, 10, 8, 5, 9, 10, 7, 6, 5, 6, 8, 6

is the study directional or non-directional, both, or not enough information to tell
state research hypothesis: (answer choices: not enough information, Voting district will differ by the preference of sign size , The effectiveness of the city counsel will effect the community’s preference of sign size or, Homeowner’s willingness to display the campaign signs will differ by the size of the sign)

A researcher conducts a one-tailed independent samples t test on 20 subjects (10 subjects in each group) and finds that t = 2.32665.How confident can the research be that the results are true and not due to mere sampling error? (answer choices: 50,79, or 100)

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