Lesson 2.102.10 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can choose the best measure of center for a data set based on its shape — one step at a time, with support.
Remember2.10 Small Group · Group 1
An outlier pulls the mean toward it, so the median is the better measure of center when the data has an outlier. Use the median when the data has an outlier. Use the mean when the data has no outliers.
Words: Mean (Media)Median (Mediana)Outlier (Valor atípico)Skewed (Sesgado)Data distribution (Distribución de datos)
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1Complete each step, then write the final answer.
Ana's quiz scores are 8, 9, 7, 8, 1. Which measure better shows a typical score: the mean or the median?
Show your workHint Look for a score far from the rest. Does it pull the mean down?
Final answer: -
2Complete each step, then write the final answer.
Which measure better shows a typical value for 12, 13, 14, 15, 51: the mean or the median?
Show your workHint Is there an outlier? An outlier pulls the mean toward it.
Final answer: -
3Complete each step, then write the final answer.
A cat weighed 9, 10, 11, 10 and 10 pounds at 5 vet visits. Which measure should the vet use for a typical weight: the mean or the median?
Show your workHint Check for an outlier first. With no outlier, which measure uses every value?
Final answer: -
4Complete each step, then write the final answer.
Six bikes cost $120, $150, $130, $140, $160 and $600. Choose the better measure of center. What is its value?
Show your workHint Find the outlier first. With 6 values, the median is halfway between the 3rd and 4th values.
Final answer:
Explain your thinkingWhen is the mean a good choice? When is the median better? Use Lily's miles and the fair data to explain.
Sentence starter I use the mean when ___. · I use the median when ___ because ___.