Summarizing Data

Which statement about the dot plot below is NOT true?

• There is a gap at 30.

• There is a cluster of data between 40 and 80.

• The peak of data is at 80.

• There is a cluster of data between 0 and 20.

The table shows students favorite flavor of ice cream.

Which percent bar graph represents the data in the table?

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Which statement about the stem and leaf plot is NOT true?

• The mode is 12.

• The range is 38.

• The median is 10.

• The mean (average) is 12.

Which statement is best supported by the data distribution of this histogram?

• The shape of the histogram is asymmetrical.

• The shape of the histogram is symmetrical.

• The shape of the histogram is skewed left.

• The shape of the histogram is skewed right.

Descriptive statistics

• use data from a sample to answer questions about population.

• allow you to generalize beyond the data at hand.

• summarize and describe data.

Methods for summarizing data make up the branch of statistics called

• Descriptive Statistics

• Inferential Statistics

• Probability

A coach compared the heights of the players on two different teams. The data set is shown in the table below. Based on these data, which statement is true?

• The mean height of the players on Team B is greater than the mean height of the players on Team A.

• The mean height of the players on Team A is greater than the height of the players on Team B.

• The median height of the players on Team B is greater than the median height of the players on Team A.

• The median height of the players on Team A is greater than the median height of the players on Team B.

Statistics which is concerned with summarizing values to describe group characteristics of the data.

• Descriptive

• Inferential

• Parametric

• Non Parametric

What are the two ways to summarize the numbers in descriptive statistics?

• quantifying their similarities

• quantifying their differences

• mean

• median

• mode

• measures of central tendency

• standard deviation

• measures of variability