Statistics Unit Test Review

What was the mean of the reported scores?

99, 97, 90, 80, 65, 75, 85, 50, 70, 99, 100, 92

• 85

• 83.5

• 78

• 91

What is the name of the graphical display?

• Boxplot

• Bar Graph (Chart)

• Histogram

• Dot Plot

What type of data does the graph display?

• Quantitative

• Categorical

What is the name of the graphical display?

• Boxplot

• Histogram

• Line Plot

What is the shape of the graphical display?

• Fairly Symmetrical

• Skewed Left Non-Symmetrical

• Skewed Right Non-Symmetrical

What is the BEST measure of central tendency (center) to use if a data set is skewed at all or has an outlier?

• mean

• median

• mode

• range

What is the shape of the data display?

• Skewed Right Non-Symmetrical

• Skewed Left Non-Symmetrical

• Symmetrical

Does the following data show any variability? Explain your reasoning using a measure of spread.

99, 99, 98, 99, 99, 98

• No, The mean is 99.

• No, The range is only 1.

• Yes, because there is more than one number in the data set.

Would it be appropriate to create a box and whisker plot or dot plot for a data set if there is no variability (spread)?

• Yes, graphs are always good to have for data visuals.

• No, because you will not have enough numbers to display a 5-number summary. Most of the marks will be on the same number.

The box and whisker plot displays the number of text messages sent by teachers in a given school day.

What percent of teachers surveyed sent between 2 and 14 text messages that day?

• 25%

• 50%

• 75%

• 0%