STAT 2430: Business Statisties 5. Identify each of the following as a Parameter

Question

STAT 2430: Business Statisties 5. Identify each of the following as a Parameter or s a) In a survey of a sample of Canadian Adults, 65% support legalizing marijuana b) The heights of all the basketball players at Michigan State University. c) The total number of grammatical errors for all the books at the National Library d) A sample of ML.B starting pitchers resulted in a mean ERA of 3,.84 a Statistics: 6. Identify which sampling method was used in cach of the following: Hint: The sampling methods we learned about are Simple Random (SRS). Stratified, Custer Systematic, Comvenience, or Voluntary Response a) Law enforcement officials use a radar gun to measure the speed of every tenth vehicle on an interstate. A study on attitudes about smoke is conducted at a college. The students are divided by class [freshman, sophomore, junior, and senior). Then a random sample is selected from each class and interviewed. b) In order to assess the opinion of students at the Ohio State University on campus snow removal, a reporter for the student newspaper interviews the first 20 students he meets on c) campus that day d) Calling randomly generated telephone numbers, a study asked 800 U.S. adults which medical conditions could be prevented by their diet. e) A radio DJ wants to know listeners opinion of the new Shinedown album, so he asks them to call or write in their opinions. 7. Of the six sampling methods we learned (Simple Random (SRS), Stratifed, Custer, Systematic Convenience, or Voluntary Response which two are biased? Explairn.

Explanation / Answer

Question 5:

Parameter are numbers that summarizes information for an entire population vs statistic is for a sample only.

a) As we are doing a sample of Canadian Adults survey here and not doing it for all the population of Canadian adults, therefore this is a case of a statistic.

b) As we are doing the analysis of all the basketball players population in the university, and not just taking a small sample from the university, therefore this is a case of a parameter.

c) As we are doing analysis of all the books at the library and not taking some small sample of books, therefore this is a case of a population and therefore this is again an example of a parameter.

d) As we are taking a sample of MLB pitches here, this is again an example of a statistic.

So whenever we see the word sample, it refers to a statistic.

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