US News and World report conducts an annual report of top colleges and universit
ID: 3204236 • Letter: U
Question
US News and World report conducts an annual report of top colleges and universities This report ranks each school based on the resources and reputation of the school. A critic of this ranking noted that the rankings look only at endowments grants and other resources but does not look at how successful students who attend the school are after they graduate. Is this critic addressing the bias, reliability or validity of the rankings? Explain. An important factor in determining the value of a home is to examine the size of the lot on which the home is located. A local real estate agent measures the width of a lot by counting the number of squares in the sidewalk across the front of the lot. He then multiplies the number of squares by 3 feet to determine the width of the lot in feet. Another agent offered the following criticisms of this method. Criticism 1: The squares in the sidewalk are often over 3 feet in length. Criticism 2: The squares are rarely the same size. Several lots of the same size could have very different numbers of squares and very different measurements. Criticism 3: To estimate the value of a home the agent should concentrate on the size and features of the home not on the size of the lot. Which of these is about the reliability, which about bias, and which about validity. Explain fully.Explanation / Answer
Answer no. 2. This is a situation of absolute Baisness. There are four types Bias as mentioned below and the critic is trying to answer that universities ranking are based on sample of Non-response Bias and Convenience Biasness. This sample take is biased hence the ranking may not be accurate.
Following are four types of sampling bias: 1. Convenience Bias 2. Environmental Bias 3. Measuremeent Bias 4. Non response bias.
The given case is a combination of Convenience & Non response sampling Bais. Sample is drawn from the most easily accessible part of the population and all respondents are not covered while deciding the ranking. As per critic of university ranking also data collected is a case conveinence bias when data collected of Endowment, grant & other resourcees available in the universities but students who graduated from universities are not covered while giving ranking.
Bais is occurs when systematic differences are introduced into the sample as a result of the sample selection and measurement process. A biased sample would not adequately represent the population & would lead to incorrect conclusions about the population. In this case also the sample collected is biased and not covering the wholestic view of all parameteers.
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