Practice Mean (9.4.1) - Statistics

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the mean of the scores 10, 20, and 30?
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Add the numbers together and divide by how many values there are.
Question 2.
If a dataset has the numbers 5, 15, and 10, what is the mean?
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Remember to sum all the numbers and divide by 3.
3Question 3.
What formula is used to calculate the mean?
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Think about how you first learned to find averages.
4Question 4.
True or False: An outlier can significantly affect the mean of a dataset.
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Consider how extreme values compare to normal ones.
Question 5.
You have the following scores: 50, 60, 70, 80, and 90. If you add 30 as an outlier, how does it affect the mean? Calculate both.
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Calculate each scenario separately to see the impact.
Question 6.
A group of children have the following heights (in cm): 110, 112, 114, 116, and 120. Then an adult height of 180 cm is added. Discuss the impact on the mean.
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Sum all heights, then divide by the new total count.

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