For each of the given scenarios do the following: state whether the study is obs
ID: 3354692 • Letter: F
Question
For each of the given scenarios do the following: state whether the study is observational or experimental; state the population and the sample; state whether the sample is a random sample of the population 1. A company is trying to determine how user friendly their new website is. Randomly selected visitors to the website are asked to completé a short survey before leaving the site. The survey consists of several questions where the user is asked to rank certairn features of the website using a scale from 1 to 5. Based on the data collected the website can be revised. a. A certain car manufacturer claims that its vehicles will not need major repairs, those costing more than $500, until after 70,000 miles. To determine the validity of this claim an independent researcher gathers service records from a random sample of repair shops who service this type of vehicle. b. In order to test the effectiveness of a new training program that all employees at the company must participate in, a random sample of employees was asked to complete a set of tasks and then time it took to complete the tasks was noted. c. Is it possible to predict college GPA from High School GPA? To answer this question a group of researchers randomly selected 10,000 college students from the United States and recorded their GPA from both high school and college. d. It has been claimed that a mere 18% of people stick with their New Year's Resolution throughout the year. To test this claim I randomly asked people on UNL campus how long they were able to keep their 2017 resolution. From my sample I found that 31% of people stick with their New Year's Resolution throughout the year. e.Explanation / Answer
its is an observational studyy. The number of visitors to the website are the population and number peple selected for the survey is the sample and is a random sample. Its is an observational study, service records form service centers is the population and service records is the random sample. its is an experimental study , coz we can control tha training, the population is the employees and samples is no. of employes selected for training. it is an observational study , populaton of interest is 10000 college student gpa marks, and a sample students is selected to observe their gpa and it is random sample.
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