Choose the best answer. Justify for full credit. (a) On the day of the Virginia
ID: 3293326 • Letter: C
Question
Choose the best answer. Justify for full credit. (a) On the day of the Virginia Primary Election, UMUC News Club organized an exit poll at three polling stations were randomly selected and all voters were surveyed as they left those polling stations.
This type of sampling is called: (i) cluster (ii) convenience (iii) systematic (iv) stratified
(b) A study was conducted at a local college to analyze the trend of average GPA of students graduated from the college. According to the Registrar, the average GPA for all students graduated from the college in 2016 is 3.5.
The value 3.5 is a (i) statistic (ii) parameter (iii) cannot be determined
(c) The hotel ratings are usually on a scale from 0 star to 5 stars.
The level of this measurement is (i) interval (ii) nominal (iii) ordinal (iv) ratio 3.
Explanation / Answer
a) i) It is cluster sampling. Polling stations are the clusters. Out of available clusters, three are chosen and studied completely. Therefore, it is Cluster Sampling.
b) (ii) Parameter. 3.5 is the avarage GPA of all the students. i.e. it is the value concerned with entire population. Therefore, it is a constant. It is Population Parameter.
c) (iii) Ordinal. This scale is like nominal scale, but in addition, it has certain hierarchy. i.e. 3 star is more than 2 star etc. So, this scale is Ordinal Scale.