Statistical Distributions

One way to measure the duration of subterranean disturbances such as earthquakes and mining is to calculate the root-mean-square time. The following histograms summarize the distributions of the root-mean-square times for two sources of disturbances. Based on the histograms, which of the following correctly compares the two distributions?

• The median of the earthquake disturbances is equal to the median of the mining disturbances.

• The median of the earthquake disturbances is less than the median of the mining disturbances.

• The range of the earthquake disturbances is equal to the range of the mining disturbances.

• The range of the earthquake disturbances is less than the range of the mining disturbances.

• The mode of the earthquake disturbances is equal to the mode of the mining disturbances.

Answer explanation

The following list shows the selling prices of 8 houses in a certain town. What is the median selling price of the houses in the list?

• $263,200

• $283,300

• $288,450

• $290,600

• $293,400

Answer explanation

The ___________ of a statistic is the distribution of values taken by the statistic in all possible samples of the sample size from the population.

• Sample Distribution

• Normal Distribution

• Unnatural Distribution

• Standard Normal Distribution

You should always use " The Distribution of________" when talking about the sampling distribution.

• True

• False

Sampling Distributions are the foundations for Statistical Inference.

• True

• False

A statistic used to estimate a parameter is an ____________ if the mean of its sampling distribution is equal to the value of the parameter being estimated.

• unbiased estiamtor

• biased estimator

• highly variable

• less variable

Choose all shapes that apply to the distribution shown.

• Bell-Shaped

• Bimodal

• Skewed Right

• Uniform

• Skewed Left

Choose all shapes that apply to the distribution shown.

• Uniform

• Skewed Right

• Symmetric

• Bimodal

• Skewed Left

Choose all shapes that apply to the distribution shown.

• Bell-Shaped

• Uniform

• Skewed Left

• Symmetric

• Skewed Right

Which two distributions have the same mean?

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