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2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt Mean, Median, Mode and Range Box and Whisker Plots Stem and Leaf Plots Histograms Analyzing Data

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What is the lower quartile for this set of data? A. 50 B.91 C.130 D.157 E.210

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The lower quartile is (B) 91 A. 50 B.91 C.130 D.157 E.210

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What is the mode number of pets in this set of data? frequency

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The mode for this set of data is 1 pet. There were four students that only had one(1) pet.

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What is the range of pets for this set of data?

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The range is the difference between the highest number and the lowest number. 14 - 0 = 14 The range is 14.

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The following were Janelle’s 8 quiz scores: 22 24 24 26 27 27 29 30 Janelle thought her median was 26 Jimmy thought her median was 26.5 And June thought her median was 27 Who was right, and why?

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The following were Janelle’s 8 quiz scores: 22 24 24 26 27 27 29 30 The median splits the data exactly in half. If you put four(4) numbers on each side of the median, it would be in- between 26 and 27. Jimmy was right, the median is 26.5

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What is the sum of the mean, median, and mode for the following set of data? 27111515

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What is the sum of the mean, median, and mode for the following set of data? 27111515 Mean = 50 ÷ 5 =10 Median =11 Mode =15 Sum = 36

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Approximately what is the range of weekly incomes? A. $130 B.$70 C.$120 D.$160 E.$190

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(C) 190 - 70 = $120

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Quiz Scores What are the values of the outliers?

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Quiz Scores Outliers are pieces of data that are significantly bigger or significantly smaller than the majority of the data. The two outliers are 9 and 10 for the 2nd period class.

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Quiz Scores Which two class periods have identical upper quartiles?

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Quiz Scores 1st period and 2nd period have identical upper quartiles of 18.5.

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If the median for this set of data is 83.5, what is the lower quartile? 707274767880828486889092

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7072747880828486889092 There are 6 data points below the median. The lower quartile is between the 3rd point (75) and the 4th point (79). The LQ is 77. 76 LQ = 77 median

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Quiz Scores What is the reason why 5th period doesn’t have an upper whisker?

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Quiz Scores The reason why the upper whisker seems to have disappeared is that all scores in that whisker are the same value as the upper quartile (20).

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How many students were surveyed in this poll?

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13

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What is the median for this set of data?

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There are 22 pieces of data. If you count in 11 from both ends, you will end up with 2 middle numbers, 15 and 17. Half way between them is the median, 16.

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How many students live more than 10 miles from school?

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9 students live more than 10 miles from school?

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What is the upper quartile for this set of data?

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The upper quartile is 21. median Upper quartile

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What is the range for this set of data? Weekly Salaries

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By using the key, you can see that the maximum salary is $197 and the minimum salary is $100. The salary range is $197 - $100 = $97. Weekly Salaries

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How many students scored 85% or higher on the semester test?

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5 + 10 + 12 = 27

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How many students scored between 14 and 18 on the proportions/ rates quiz?

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15 + 23 = 38

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When doing homework, which category contained exactly 15 students? Number of Minutes Spent on Homework How many minutes students spend on homework

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Number of Minutes Spent on Homework How many minutes students spend on homework 15 Students spent 200 to 240 minutes studying homework.

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How many students took the semester test?

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6 + 5 + 12 + 14 + 13 + 6 + 7 + 10 + 5 + 10 + 12 = 100

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Quickly sketch in the histogram for the data in the chart. 5060708090100 5 10 15

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5060708090100 5 10 15 8 7 13 10 12

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Plane Flights There are 96 plane flights in this set of data. How many flights are above the median?

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Half of the flights are above the median. Therefore half of 96 flights are above the median. Half of 96 is 48. There are 48 flights above the median.

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Which colored plane shows the most consistent flights?

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The Salmon plane has the smallest range. If you ignored the outliers, the Green plane would have been the most consistent.

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Students’ Swimming During June There are 3 distinct clusters of information in this line plot. Give the range of each “cluster”.

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Students’ Swimming During June The clusters of information are: 1 to 4 8 to 13 15 to 20 } } }

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The upper quartile for this set of data is 21. If there are 40 students in this class, how many students scored above 21 on the quiz?

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Each section on a box plot contains 1/4 of the data. 1/4 of 40 is ten. Therefore there are 10 students who scored above the upper quartile of 21. 10 students

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Plane Flights What percent of the data is above the lower quartile?

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A box plot is divided into 4 equal sections. Each section contains 25% of the data. Therefore 75% of the data is located above the lower quartile.

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