Quiz # 7.01

The two sets of data below represent the number of runs scored by two different youth baseball teams over the course of a season.

Which set of statements about the mean and standard deviation is true?

• (1) mean A < mean B

  standard deviation A > standard deviation B

• (2) mean A > mean B

  standard deviation A < standard deviation B

• (3) mean A < mean B

  standard deviation A < standard deviation B

• (4) mean A > mean B

  standard deviation A > standard deviation B

Which statistic can not be determined from a box plot representing the scores on a math test in Mrs. DeRidder’s algebra class?

• (1) the lowest score

• (2) the median score

• (3) the highest score

• (4) the score that occurs most frequently

3.Corinne is planning a beach vacation in July and is analyzing the daily high temperatures for her potential destination. She would like to choose a destination with a high median temperature and a small interquartile range. She constructed box plots shown in the diagram below.

Which destination has a median temperature above 80 degrees and the smallest interquartile range?

• (1) Ocean Beach

• (2) Whispering Palms

• (3) Serene Shores

• (4) Pelican Beach

Noah conducted a survey on sports participation. He created the following two dot plots to represent the number of students participating, by age, in soccer and basketball.

Which statement about the given data sets is correct?

• (1) The data for soccer players are skewed right.

• (2) The data for soccer players have less spread than the data for basketball players.

• (3) The data for basketball players have the same median as the data for soccer players.

• (4) The data for basketball players have a greater mean than the data for soccer players.

Christopher looked at his quiz scores shown below for the first and second semester of his Algebra class.

Semester 1: 78, 91, 88, 83, 94

Semester 2: 91, 96, 80, 77, 88, 85, 92

Which statement about Christopher’s performance is correct?

• (1) The interquartile range for semester 1 is greater than the interquartile range for semester 2.

• (2) The median score for semester 1 is greater than the median score for semester 2.

• (3) The mean score for semester 2 is greater than the mean score for semester 1.

• (4) The third quartile for semester 2 is greater than the third quartile for semester 1.

Robin collected data on the number of hours she watched television on Sunday through Thursday nights for a period of 3 weeks. The data are shown in the table below.

Using an appropriate scale on the number line below, construct a box plot for the 15 values.

Is Robins's this Plot correct?

• True

• False

The table below shows the annual salaries for the 24 members of a professional sports team in terms of millions of dollars.

The team signs an additional player to a contract worth 10 million dollars per year. Which statement about the median and mean is true?

• (1) Both will increase.

• (2) Only the median will increase.

• (3) Only the mean will increase.

• (4) Neither will change.

The dot plot shown below represents the number of pets owned by students in a class.

Which statement about the data is not true?

• (1) The median is 3.

• (2) The interquartile range is 2.

• (3) The mean is 3.

• (4) The data contain no outliers.

The heights, in inches, of 12 students are listed below.

61, 67, 72, 62, 65, 59, 60, 79, 60, 61, 64, 63

Which statement best describes the spread of these data?

• (1) The set of data is evenly spread.

• (2) The median of the data is 62.5

• (3) The set of data is skewed because 59 is the only value below 60.

• (4) 79 is an outlier, which would affect the standard deviation of these data.

The heights, in feet, of former New York Knicks basketball players are listed below.

Using the heights given, a student completed a frequency table below.

Which Frequency table is correct?

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