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BESC 3010 Exam 2 Questions and Answers | Latest Version | 2024/2025 | Already Passed CA$13.73   Add to cart
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BESC 3010 Exam 2 Questions and Answers | Latest Version | 2024/2025 | Already Passed What is statistical significance, and why is it important? Statistical significance indicates whether the results of a study are likely due to chance or reflect a true effect in the population, guiding res...

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  • November 4, 2024
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BESC 3010 Exam 2 Questions and
Answers | Latest Version | 2024/2025 |
Already Passed
What is statistical significance, and why is it important?


✔✔Statistical significance indicates whether the results of a study are likely due to chance or

reflect a true effect in the population, guiding researchers in decision-making and conclusions.




How can visual representations like histograms enhance data interpretation?


✔✔Histograms provide a visual summary of data distribution, allowing us to quickly identify

patterns, such as skewness or modality, that might not be apparent in numerical data alone.




What is a skewed distribution, and what does it tell us about the data?


✔✔A skewed distribution occurs when data points are not evenly distributed around the mean; it

suggests that there may be outliers or that the data is influenced by external factors.




Why is it essential to consider the sample size in statistical studies?


✔✔Sample size impacts the reliability of results; larger samples typically yield more accurate

estimates and reduce the margin of error, leading to more robust conclusions.




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,How does the concept of "central tendency" help summarize data?


✔✔Central tendency refers to the typical value within a dataset, using metrics like mean,

median, and mode to provide a quick snapshot of the data's overall behavior.




What role does a scatter plot play in understanding relationships between variables?


✔✔A scatter plot visually depicts the relationship between two variables, helping us identify

trends, correlations, and potential outliers in the data.




What are the implications of a high correlation coefficient between two variables?


✔✔A high correlation coefficient suggests a strong relationship between two variables,

indicating that changes in one variable are closely associated with changes in the other.




How does hypothesis testing guide scientific inquiry?


✔✔Hypothesis testing helps researchers make informed decisions by providing a systematic

method for assessing the validity of assumptions and claims based on empirical evidence.




What is a confidence level, and how does it relate to confidence intervals?




2

, ✔✔A confidence level represents the percentage of times we expect the confidence interval to

contain the true population parameter if we repeated the study multiple times, often set at 95% or

99%.




How does data normalization improve the analysis of datasets?


✔✔Data normalization adjusts values measured on different scales to a common scale,

enhancing the comparability of data points and improving the accuracy of statistical analyses.




What are outliers, and how can they impact statistical conclusions?


✔✔Outliers are data points that deviate significantly from the rest of the dataset; they can skew

results and lead to incorrect interpretations, making it crucial to investigate their causes.




Why is it beneficial to use both descriptive and inferential statistics in research?


✔✔Descriptive statistics summarize and describe the main features of a dataset, while inferential

statistics allow us to draw conclusions and make predictions about a larger population based on

sample data.




How can the use of control groups in experiments mitigate bias?




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