Select the outlier in the data set. 31, 41, 53, 54, 66, 69, 77, 89, 409

Identify data set: Step 1: Identify the data set and look for any number that seems unusually high or low compared to the others. Data set: 31, 41, 53, 54, 66, 69, 77, 89, 409 Observation: 409 is significantly higher than all other numbers.Calculate range and median: Step 2: Calculate the range and median to confirm if 409 is an outlier. Range = Maximum value - Minimum value Range = 409 - 31 = 378 Median (middle value of sorted data) = 66Compare to rest of data set: Step 3: Compare 409 to the rest of the data set to see if it falls outside a typical range. All other numbers are between 31 and 89, which makes 409 stand out as it is much higher.

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Select the outlier in the data set. $\newline$ $31, 41, 53, 54, 66, 69, 77, 89, 409$

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Grade 7

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Q. Select the outlier in the data set.

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31, 41, 53, 54, 66, 69, 77, 89, 409

Identify data set: Step $1$ : Identify the data set and look for any number that seems unusually high or low compared to the others. $\newline$ Data set: $31, 41, 53, 54, 66, 69, 77, 89, 409$ $\newline$ Observation: $409$ is significantly higher than all other numbers.
Calculate range and median: Step $2$ : Calculate the range and median to confirm if $409$ is an outlier. $\newline$ Range = Maximum value - Minimum value $\newline$ Range = $409 - 31 = 378$ $\newline$ Median (middle value of sorted data) = $66$
Compare to rest of data set: Step $3$ : Compare $409$ to the rest of the data set to see if it falls outside a typical range. $\newline$ All other numbers are between $31$ and $89$ , which makes $409$ stand out as it is much higher.