Statistics Review

How many pieces of data are shown on this dot plot?

• Max. - Min = 6-0=6

• 17, I counted the data

• 2, it is in the middle

What is the difference between a statistical question and one that is not statistical?

• The answers can show you how many of something.

• Answers of statistical questions have variability (many answers). Non-statistical have no variability (one answer).

• There are no answers to statistical questions.

• Statistical questions are harder!

Which statement is best supported by the box plot?

• The mean of the data is 85.

• There were 98 students included in the data.

• The median of the data is 85.

• Half of the students scored between 68 and 94.

Select the four statements that are true about the box plot shown.

• The range of the exam scores is 77.

• The median score is 83.

• 25% of the exam scores are above 68.

• 75% of the exam scores are below 93.

• The left side of the data is more spread out and the right side is more clustered.

Which statement is true about a box plot where the length of the left box and left whisker is the SAME length as the right box and right whisker?

• The right half of the data is more clustered than the left half.

• The upper extreme and the lower extreme are the same.

• Both halves of the data have an equal spread.

• There are no outliers.

Select the two statements that are true about this line plot.

• The distribution is symmetric.

• The distribution is skewed.

• The mean should be used to describe the center of the data distribution.

• The median should be used to describe the center of the data distribution.

• The spread of the data is 10.

Which statement about the data in the histogram is true?

• The distribution of the data is symmetrical, so the peak is not in the middle of the data.

• The distribution of the data is symmetrical, so the peak is in the middle of the data.

• The distribution of the data is skewed, so the peak is not in the middle of the data.

• The distribution of the data is skewed, so the peak is in the middle of the data.

Which three statements are true about this line plot?

• The distribution is symmetric.

• The distribution is skewed.

• The mean should be used to describe the center of the data distribution.

• The median should be used to describe the center of the data distribution.

• The spread of the data is 6.

Which statement about the data in the histogram is true?

• The distribution of the data is symmetrical, so the mean and the median are most likely the same value.

• The distribution of the data is symmetrical, so the mean and the median are most likely different values.

• The distribution of the data is skewed, so the mean and the median are most likely the same value.

• The distribution of the data is skewed, so the mean and the median are most likely different values.

When the mean and the median are the same or almost the same value, the distribution is said to be symmetric.

• True

• False