Descriptive Statistics: Numerical Summaries and Plots

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What is the totality of all observations of a phenomenon of interest?

Sample mean

Sample variance

Histogram

Population (correct)

Which visual data display can be used to construct and interpret visual data displays, including the stem-and-leaf display, the histogram, and the box plot?

Probability plots

Frequency distributions

Time sequence plots

Stem-and-leaf diagram (correct)

What is the concept used to visually compare two or more samples of data?

Sample variance

Time sequence plots

Box plots (correct)

Sample standard deviation

What is used to explain the concept of random sampling?

Normal probability plots Signup and view all the answers

What is used to visually display the important features of time-oriented data?

Time sequence plots Signup and view all the answers

Which measure is used to compute and interpret the sample mean, sample variance, sample standard deviation, sample median, and sample range?

Numerical summaries of data Signup and view all the answers

What is the measure used to describe the center of a collection of data?

Mean Signup and view all the answers

Which parameter is used to measure the spread of a population?

Standard deviation Signup and view all the answers

In a random sample, what is used to estimate the parameters of a population?

Mean Signup and view all the answers

What is the population mean symbol?

$μ$ Signup and view all the answers

Which term refers to the balance point in a sample?

Mean Signup and view all the answers

What is the formula for calculating the sample variance?

$s^2 = \frac{1}{n-1} \sum_{i=1}^{n} (x_i - \bar{x})^2$ Signup and view all the answers

What is the symbol for population standard deviation?

$σ$ Signup and view all the answers

What units are the same as the standard deviation?

$\mu$ Signup and view all the answers

Which parameter is used to measure the spread of a sample?

$s$ Signup and view all the answers

What formula is used to calculate the population variance?

$rac{1}{N} \[ \[ \] \]$ \sum_{i=1}^{N} (x_i - μ)^2 f(x_i) Signup and view all the answers

Descriptive Statistics: Numerical Summaries and Plots

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Questions and Answers

What is the totality of all observations of a phenomenon of interest?

Which visual data display can be used to construct and interpret visual data displays, including the stem-and-leaf display, the histogram, and the box plot?

What is the concept used to visually compare two or more samples of data?

What is used to explain the concept of random sampling?

What is used to visually display the important features of time-oriented data?

Which measure is used to compute and interpret the sample mean, sample variance, sample standard deviation, sample median, and sample range?

What is the measure used to describe the center of a collection of data?

Which parameter is used to measure the spread of a population?

In a random sample, what is used to estimate the parameters of a population?

What is the population mean symbol?

Which term refers to the balance point in a sample?

What is the formula for calculating the sample variance?

What is the symbol for population standard deviation?

What units are the same as the standard deviation?

Which parameter is used to measure the spread of a sample?

What formula is used to calculate the population variance?

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