Domanda del libro di testo
Determine whether the survey question is biased. If the question is biased, suggest a better wording.
Do you agree that the town’s ban on skateboarding in parks is unfair?
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Ch. 1 - Introduction to Statistics
Larson8th EditionElementary Statistics: Picturing the WorldISBN: 9780137493470
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TOC.tableOfContents
- Ch. 1 - Introduction to Statistics87
- Ch. 2 - Descriptive Statistics176
- Ch. 3 - Probability184
- Ch. 4 - Discrete Probability Distributions102
- Ch. 5 - Normal Probability Distributions183
- Ch. 6 - Confidence Intervals154
- Ch. 7 - Hypothesis Testing with One Sample165
- Ch. 8 - Hypothesis Testing with Two Samples134
- Ch. 9 - Correlation and Regression87
- Ch. 10 - Chi-Square Tests and the F-Distribution87
Larson8th EditionElementary Statistics: Picturing the WorldISBN: 9780137493470Non è quello che usi tu?Cambia libro di testo
Capitolo 1, Problema 1.T.2
Determine whether each number describes a population parameter or a sample statistic. Explain.
In a recent year, the average evidence-based reading and writing score on the SAT was 528. (Source: College Board)
Guida verificata passo dopo passo1
Understand the definitions: A population parameter is a numerical value that describes a characteristic of an entire population, while a sample statistic is a numerical value that describes a characteristic of a subset (sample) of the population.
Identify the context of the problem: The problem states that the average evidence-based reading and writing score on the SAT was 528 for a recent year. This value is based on all test-takers in that year, as it is provided by the College Board, which collects data for the entire population of SAT test-takers.
Determine whether the value represents a population parameter or a sample statistic: Since the value of 528 is based on the entire population of SAT test-takers for that year, it is a population parameter.
Explain the reasoning: A population parameter is used when the data represents the entire group being studied. In this case, the College Board has access to the scores of all SAT test-takers, so the average score of 528 is a parameter, not a statistic.
Conclude: The number 528 describes a population parameter because it summarizes a characteristic (average score) of the entire population of SAT test-takers for that year.
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Population Parameter
A population parameter is a numerical value that summarizes a characteristic of an entire population. It is a fixed value, often unknown, and is typically estimated through statistical methods. In the context of the SAT score, if the average score of 528 represents all test-takers in a given year, it is a population parameter.
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Percorso guidato
05:53
Parameters vs. Statistics
Sample Statistic
A sample statistic is a numerical value that summarizes a characteristic of a sample, which is a subset of the population. Sample statistics are used to estimate population parameters and can vary from sample to sample. If the average SAT score of 528 was calculated from a smaller group of test-takers rather than all, it would be considered a sample statistic.
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Percorso guidato
05:11Sampling Distribution of Sample Proportion
Descriptive Statistics
Descriptive statistics are methods for summarizing and organizing data to describe the main features of a dataset. This includes measures such as mean, median, mode, and standard deviation. The average SAT score of 528 is an example of descriptive statistics, as it provides a summary measure of the reading and writing scores for the population or sample in question.
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Percorso guidato
05:53Parameters vs. Statistics
Pratica correlata
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Determine whether the number describes a population parameter or a sample statistic. Explain your reasoning.
In a survey of 1000 household food purchasers, 24.7% say that they avoid meat, dairy, and eggs produced by animals living in confined conditions. (Source: FoodPrint)
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Domanda del libro di testo
Determine whether the data are qualitative or quantitative, and determine the level of measurement of the data set. Explain your reasoning.
The numbers of employees at fast-food restaurants in a city are listed.
20 11 6 31 17 23 12 18 40 22 13 8 18 14 37 32 25 27 25 18
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Domanda del libro di testo
Determine whether the survey question is biased. If the question is biased, suggest a better wording.
How many hours of sleep do you get on a normal night?
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Domanda del libro di testo
Which part of the survey described in Exercise 3 represents the descriptive branch of statistics? Make an inference based on the results of the survey.
158
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Domanda del libro di testo
Determine the level of measurement of the data set. Explain.
The total compensations (in millions of dollars) of the ten highest-paid CEOs at U.S. public companies are listed. (Source: 24/7 Wall St.)
280.6 66.9 42.9 36.5 34.3 31.6 31.6 28.8 26.4 25.8
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