Front

What is median in statistics?

Back

The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of observations, the median is the average of the two middle numbers.

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How do you determine which company has a higher median wait time?

Back

To determine which company has a higher median wait time, compare the median values of the wait times for each company. The company with the higher median value has the longer wait time.

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What does it mean if a company has the longest wait time?

Back

The longest wait time refers to the maximum wait time recorded for that company, indicating the highest individual wait time experienced by a customer.

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What is the significance of the 75th percentile in data analysis?

Back

The 75th percentile indicates that 75% of the data points fall below this value, which can help in understanding the distribution and identifying outliers.

Front

How can you compare two sets of data?

Back

You can compare two sets of data by analyzing measures such as mean, median, mode, range, and standard deviation, as well as visual representations like box plots or histograms.

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What is a box plot?

Back

A box plot is a graphical representation of a data set that shows the median, quartiles, and potential outliers, providing a visual summary of the data distribution.

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What does it mean if data is skewed?

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Skewed data means that the distribution of values is not symmetrical, with a longer tail on one side. Positive skew has a tail on the right, while negative skew has a tail on the left.

Front

What is the difference between mean and median?

Back

The mean is the average of all data points, while the median is the middle value when data points are arranged in order. The mean can be affected by outliers, while the median is more robust.

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What is a data outlier?

Back

An outlier is a data point that is significantly different from other observations in a data set, often lying outside the range of the majority of the data.

Front

How do you interpret a median wait time of 15 minutes?

Back

A median wait time of 15 minutes means that half of the customers waited less than 15 minutes, and half waited more, indicating a central tendency of wait times.