In the current pandemic situation, students on our GMU campus are making greater use of robotic food delivery service. University dining services wants to know how satisfied students are with the robotic service during this crisis It surveyed 40 students on campus and asked them to rate the service on a 100 point scale They obtained a sample average of 79 points. This service has been provided by the University for some time and the population standard deviation of satisfaction is known to be 7 points. (a) What is the population for which inferencing is being done? [narrative, no calculation] (b) What is the population parameter for which inferencing is being done? [narrative, no calculation] (c) at a 91% level of confidence, what is the margin of error? (d) What is the 91% confidence interval for the population parameter? [Note: be sure to express the confidence interval in narrative form for the context of this problem.]
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