Summary: Emba: Data And Decisions

Read the summary and the most important questions on EMBA: DATA AND DECISIONS

• 1 ONE-VARIABLE STATISTICS

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• 1.1 Chapter 1: Measuring the Center

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• True or False. Outliers have values that are significantly higher or lower than the other numbers in a data set.

  True

• 1.1.1 Measuring Central Tendency: Mean, Median, and Mode

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• True or False. Median is the "middle" of the set. If there is an even number, get the median of both the middle numbers.

  True

• What is bimodal and multimodal?

  Bimodal is 2 modes, and multimodal is 3 modes or more, in a set.

• True or False. If outliers present Median better represents the center of the data than the mean.

  True

• 1.1.2 Standard Deviation

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• True or false. Standard deviation can be considered before and after the mean value i.e. Mean of 50u and standard deviation of 20u, it is between 30 and 70u.

  True

• True or false. The standard deviation gives a rough idea of where most of the data in a set falls in relation to the mean.

  True

• True or False. If we want to know how the data values vary from the mean, we need to find the standard deviation.

  True

• 1.1.3 Five Number Summary

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• True or false. The five number summary not only describes the center of a data set, but also how it spreads out from the median.

  True

• What is the 1st step in computing the five-number summary?

  Arrange the data in numerical order

• True or False. We need to ignore the median of the entire data set when identifying medians of the lower and upper halves.

  True