What is the population for which inferencing is being done? (narrative, no calculation) What is the population parameter for which inferencing is being done? (narrative, no calculation) At a 99% level of confidence, what is the margin of error? What is the 99% confidence interval for the population parameter?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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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 45 students on campus and asked them to rate the service on a 100 point scale.  They obtained a sample average of 78 points.  This service has been provided by the University for some time and the population standard deviation of satisfaction is known to be  5.5 points.

 

  1. What is the population for which inferencing is being done? (narrative, no calculation)
  2. What is the population parameter for which inferencing is being done? (narrative, no calculation)
  3. At a 99% level of confidence, what is the margin of error?
  4. What is the 99% confidence interval for the population parameter?
Expert Solution
Step 1

A population is a set or group of observations associated with a certain phenomenon under statistical investigation. In this case, University dining services want to know how satisfied are students of GMU campus are with the robotic service during this crisis. Therefore, all the students of the GMU campus can be considered as population.

 

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