Prelim Standard 2 Exploring and Describing Data 1

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A set of scores has the following five-number summary. What is the range?

1 point

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A set of data is displayed in this dot plot. Which of the following best describes this set of data?

1 point

Symmetrical

Positively skewed

Negatively skewed

Normally distributed

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A set of data is summarised in this frequency distribution table. Which of the following is true about the data?

1 point

Mode = 7, median = 5.5

Mode = 7, median = 6

Mode = 9, median = 5.5

Mode = 9, median = 6

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A dataset has the following five-number summary. If the range of the dataset is 7, what is the minimum value of the dataset?

1 point

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A dataset has the following five-number summary. What is the interquartile range of the dataset?

1 point

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The box-plots show the results of a test sat by two classes, A and B. Which of the following statements is true about Class B’s results when compared to those of Class A?

1 point

The IQR for Class B’s results is larger than that for Class A’s results.

The results for Class B are more consistent than those of Class A.

25% of Class B’s results are higher than all of Class A’s results.

25% of Class B’s results are lower than half of Class A’s results.

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The dot plots show the class scores in tests taken before and after a unit of work was completed.They are drawn on the same scale. Which statement about the change in scores is correct?

1 point

The mean increased and the standard deviation decreased.

The mean increased and the standard deviation increased.

The mean decreased and the standard deviation decreased.

The mean decreased and the standard deviation increased.

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In a computer game, a player scored 180, 183, 184, 186 and 192 in the first five rounds. After playing a sixth round, the player’s average score increased by 1. What was the player’s score in the sixth round?

1 point

185

186

191

193

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Which histogram best represents a dataset that is positively skewed?

1 point

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John recently did a class test in each of three subjects. The class scores on each test were normally distributed.The table shows the subjects and John’s scores as well as the mean and standard deviation of the class scores on each test. Relative to the rest of the class, which row of the table below shows John’s strongest subject and his weakest subject?

1 point

Strongest subject Commerce Weakest subject French

Strongest subject French Weakest subject Music

Strongest subject Music Weakest subject French

Strongest subject Commerce Weakest subject Music

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