Straighter Line Statistics Questions and Answers | Latest Version | 2024/2025 | Already Passed
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Course
Straighter Line Statistics
Institution
Straighter Line Statistics
Straighter Line Statistics Questions and
Answers | Latest Version | 2024/2025 |
Already Passed
Describe how the mean is calculated in a dataset.
The mean is calculated by summing all the data values and dividing by the number of values
in the dataset.
Explain the difference between p...
Straighter Line Statistics Questions and
Answers | Latest Version | 2024/2025 |
Already Passed
Describe how the mean is calculated in a dataset.
✔✔ The mean is calculated by summing all the data values and dividing by the number of values
in the dataset.
Explain the difference between population variance and sample variance.
✔✔ Population variance is calculated using the entire population data, while sample variance is
computed from a sample and uses \( n - 1 \) (degrees of freedom) in the denominator.
What is the purpose of the central limit theorem in statistics?
✔✔ The central limit theorem states that the distribution of the sample mean approaches a
normal distribution as the sample size increases, regardless of the population's distribution.
Describe how standard deviation is used to interpret data variability.
✔✔ Standard deviation measures the average distance of data points from the mean, indicating
the spread or dispersion of the dataset.
1
, Explain the concept of confidence intervals and their significance.
✔✔ Confidence intervals provide a range within which a population parameter is likely to fall
with a certain level of confidence.
What is the difference between discrete and continuous variables?
✔✔ Discrete variables are countable and have distinct, separate values, while continuous
variables can take on an infinite number of values within a range.
Describe the null hypothesis and its role in hypothesis testing.
✔✔ The null hypothesis is a statement of no effect or no difference, used as a starting point for
statistical testing to determine if there is enough evidence to reject it.
Explain the use of the Chi-square test in statistical analysis.
✔✔ The Chi-square test is used to determine if there is a significant association between
categorical variables or if the observed frequencies differ from expected frequencies.
What is the purpose of regression analysis in statistics?
✔✔ Regression analysis is used to model and analyze the relationship between a dependent
variable and one or more independent variables.
2
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