Practice Statistics (5) - Statistics

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9 questions

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

Question 1.
What is data?
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Think about what kind of information statistics deal with.
Question 2.
Define raw data.
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Consider data that hasn't been sorted or summarized.
3Question 3.
What is the mean of the following numbers: 10, 20, 30?
- 15
- 20
- 25
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Add the numbers first before dividing.
4Question 4.
True or False: The median is always the highest value in a dataset.
- True
- False
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Consider how the median is determined.
Question 5.
You are given the following ages of 10 people: 18, 20, 22, 28, 30, 32, 35, 42, 50, and 55. Calculate the mean, median, mode, and create a grouped frequency table for this dataset.
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Use definitions of mean, median, and the process of grouping data into ranges.
Question 6.
A school collects the heights of its students and groups them into intervals. If the frequency distribution shows 5 students in the range of 140-149 cm, 10 students in 150-159 cm, and 4 students in 160-169 cm, find the class mark for each interval.
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Use the class mark formula: (Upper Limit + Lower Limit) / 2.

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