Practice Cumulative Frequency And Percentiles (5) - Descriptive Statistics

Practice: Cumulative Frequency and Percentiles

Lesson 5Descriptive Statistics

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define cumulative frequency.
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Think about how you create totals as you add up values.
Question 2.
What does the 50th percentile represent?
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Consider the middle of a data set.
3Question 3.
What is cumulative frequency?
- A total of each data point
- A running total of frequencies
- A representative sample
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Think about how totals grow when you keep adding more values.
4Question 4.
True or False: The 100th percentile represents the highest score in a dataset.
- True
- False
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Consider what it means to be at the very top of a distribution.
Question 5.
In a dataset of exam scores, the following scores were recorded: 65, 70, 75, 80, 85, 90, 95. Calculate the cumulative frequency and find the 75th percentile.
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Add frequencies and calculate the position for the 75th percentile.
Question 6.
A survey revealed that 40% of respondents are in the 50th to 75th percentile range for income. If there are 500 respondents, how many people fall within this income bracket?
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Calculate 40% of the total number of respondents.

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