BESC 3010 POSTTEST 3 QUESTIONS
AND ANSWERS | LATEST UPDATE |
2024/2025 | GRADED A+
What is the definition of a statistic?
A statistic is a numerical characteristic or measure obtained by using the data values from a
sample.
What is the difference between a parameter and a statistic?
...
BESC 3010 POSTTEST 3 QUESTIONS
AND ANSWERS | LATEST UPDATE |
2024/2025 | GRADED A+
What is the definition of a statistic?
✔✔A statistic is a numerical characteristic or measure obtained by using the data values from a
sample.
What is the difference between a parameter and a statistic?
✔✔A parameter is a numerical characteristic of a population, while a statistic is a numerical
characteristic of a sample drawn from that population.
How do you calculate the mean of a data set?
✔✔The mean is calculated by summing all the data points and dividing by the number of points
in the dataset.
What does the standard deviation measure?
✔✔The standard deviation measures the amount of variability or dispersion in a set of data
values, indicating how much the values deviate from the mean.
1
, What is a skewed distribution, and how can you identify it?
✔✔A skewed distribution is one where the data points are not symmetrically distributed around
the mean. It can be identified by comparing the mean and median; in a right-skewed distribution,
the mean is greater than the median.
What is the purpose of a hypothesis test?
✔✔The purpose of a hypothesis test is to determine whether there is enough statistical evidence
in a sample of data to support a specific claim about the population.
How do you interpret a confidence interval?
✔✔A confidence interval provides a range of values that is believed to contain the true
population parameter with a certain level of confidence, usually expressed as a percentage.
What is the significance of the p-value in hypothesis testing?
✔✔The p-value indicates the probability of observing the test results under the null hypothesis.
A low p-value suggests that the null hypothesis may be rejected.
What is the difference between Type I and Type II errors?
2
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