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Statistics 101 Essay

2053 words - 8 pages

1. Determine whether the evaluated group is a population or a sample
A. Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer.

Answer: The evaluated group of 500 patients within this study is considered to be a sample. The 500 patients whom possess high cholesterol are comprised of the larger group of patients of which serve holistically as the population. The 500 patients randomly selected from the total population with high cholesterol of which 67% were found with heart disease constitute as the sample.

B. An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants have serious health code violations. Is this a population or a sample; explain your answer.

Answer: The fact that an investigation of local restaurants was conducted in which 150 were selected randomly indicates that this is a sample. This sample indicates that out of the 150 randomly selected, 42% of this random selection out of the total population of restaurants possessed series health code violations.

2. Determine whether the given value is a statistic or a parameter.
A. A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer.

Answer: The identification of 42.7% of all the downtown office building of which possess ventilation problems serves as the population parameter. A population parameter is understood as the numerical identification of which is utilized in order to describe specific features given towards the population (Bennett, Briggs, & Triola, 2014).

Within this example, the suggested implication is that the researcher conducted their specific study upon an entire given population of which constitute of all the office buildings located within a downtown location. Of this research the researcher discovered that a particular percentage of the building possessed ventilation complications.

B. After taking the first exam, 15 of the students dropped the class. Is this a statistic or a parameter; explain your answer.

Answer: Sample statistics are understood as numerical ascriptions given towards a sample of which is determined by the consolidation or summarizing of collected data within research (Bennett, Briggs, & Triola, 2014). This definitional explanation shares that the given example is that of a sample statistic. The example provides no understanding of a viable population of which has been studied or the total numerical identification of the complete student population of which participated within the exam. Rather it only shares that 15 students, after participating within the first exam, dropped the course.

3. Identify the type of sampling used.
A. A tax auditor selects every 1000th income tax return that is received. What type of sample is this and why?


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