كويز تفاعلي: Statistics and Data Analysis Practice Test

This comprehensive practice test focuses on key concepts of statistics and data interpretation. It covers the identification of statistical questions, measures of central tendency such as the mean and median, and measures of variability including the Mean Absolute Deviation (MAD) and Range. Students will also practice interpreting data displays like dot plots, histograms, and box plots, while understanding how outliers impact different statistical summaries.

Question 1

Points: 1

Which of the following best defines a statistical question?

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Question 2

Points: 1

Which of these is a statistical question?

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Question 3

Points: 1

What is the primary purpose of a dot plot?

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Question 4

Points: 1

Which of the following is a key characteristic of a histogram?

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Question 5

Points: 1

Calculate the mean of the following data set: \( \{10, 15, 20, 25, 30\} \)

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Question 6

Points: 1

A student wants a mean score of 90 on four tests. Their scores on the first three tests are 85, 92, and 88. What score do they need on the fourth test?

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Question 7

Points: 1

Find the median of the following data set: \( \{12, 5, 9, 20, 15\} \)

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Question 8

Points: 1

In a box plot, what value represents the Lower Quartile (Q1)?

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Question 9

Points: 1

If all the numbers in a data set are the same (e.g., \( \{7, 7, 7, 7\} \)), what is the range?

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Question 10

Points: 1

Data Set A has a MAD of 1.2 and Data Set B has a MAD of 4.5. Which set is more consistent?

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Question 11

Points: 1

Which measure of center is MOST affected by an extreme outlier?

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Question 12

Points: 1

Joakim spent 40, 25, 60, 35, and 40 minutes practicing the piano last week. Identify the outlier in this data set.

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Question 13

Points: 1

The dot plot shows the number of televisions owned by 18 families. Given the presence of an outlier at 10, which measures of center and variation best describe this data set?