Practice Statistics (9) - Statistics

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11 questions

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4 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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5 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define mean.
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Think of it as total scores divided by the number of scores.
Question 2.
What is a mode in a dataset?
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Consider the number that appears the most often.
3Question 3.
What is the formula to calculate the mean?
- (Sum of values)/Number of values
- (Sum of values)/2
- (Sum of values)^2
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Think of an average!
4Question 4.
Median is the middle value in a data set, true or false?
- True
- False
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Think about sorting the list!
Question 5.
A survey of students' books read in a year results in the following frequency: 2 (1 book), 4 (2 books), 6 (3 books), 5 (4 books), and 3 (5 books). Calculate the mean, median, and mode of books read.
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Tabulate the data first to better visualize and perform calculations.
Question 6.
A group of kids' ages are: 8, 10, 8, 12, 14. If one boy is added, aged 6, how will this impact the mean, median, and mode?
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Check the new total before recalculating the mean.

7 more questions in this section. Enroll free to practise them all.