A few big picture questions to wrap up the semester: a.) What is a statistic, an
ID: 3231141 • Letter: A
Question
A few big picture questions to wrap up the semester:
a.) What is a statistic, anyway?
A number that summarizes a sample. It estimates the value of a number summarizing a population.
The values a variable can take along with their probabilities.
A person randomly selected from a population.
A number that summarizes a population.
A sample of people from a population.
b.) What does a confidence interval tell us?
A range of plausible values for the value of a statistic from the next random sample.
A range of plausible values for a population parameter.
The probability the next statistic falls in that interval.
A range of plausible values for the next individual to fall.
The difference between two parameters.
Explanation / Answer
ANSWERS:
a) A number that summarizes a sample. It estimates the value of a number summarizing a population
EXPLANATION: The statistical constants (sample mean(Xbar,sample variance(s2)), which are calculated from the sample is known as statistic. These are used for estimating the population parameters
b )A range of plausible values for a population parameter.
EXPLANATION: Interval estimation is most imporatant procedure for estimating the unknown population parameters, It gives interval of the parameter with certain confidence.
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