Quantitative Methods Online Course Five Questions Answers with screen shots

The median is often a better representative of the central value of a data set when the data set:
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Is bimodal.

Has a high standard deviation.

Is highly skewed.

Has no outliers.
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The histogram below plots the carbon monoxide (CO) emissions (in pounds/minute) of 40 different airplane models at take-off.

The distribution is best described as is:
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Uniform.

Heteroskedastic.

Normal.

Skewed right.
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The histogram below plots the carbon monoxide (CO) emissions (in pounds/minute) of 40 different airplane models at take-off.

Which of the following statements is the best inference that can be drawn from this histogram?
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The mean amount of carbon monoxide emissions is greater than the median amount of carbon monoxide emissions.

The mean amount of carbon monoxide emissions is less than the median amount of carbon monoxide emissions.

The mean and median amounts of carbon monoxide emissions are about equal.

The relative sizes of the mean and median amounts of carbon monoxide emissions cannot be inferred from the histogram
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n the data set shown below, the correlation coefficient of the two variables is:
Correlation Data
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-1.0.

-0.5

0.0

None of the above
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The data in the Excel spreadsheet linked below give the ages and salaries of the chief executive officers of 59 companies with sales between \$5 million and \$350 million.

The correlation between age and salary can be characterized as:
CEO Salaries
Source
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Strong and positive.

Strong and negative.

Weak and positive.

Weak and negative
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