2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Scales & Intervals Bar & Line Graphs Measures of Central Tendency Misleading Statistics The Coordinate System

Choose the better scale for a frequency table for the set of data: 53, 88, 25, 47, 50, 18, 15, 43 a.) 0-99b.) 20-80

a.) 0-99 because the scale must include all of the data

Choose the best interval for a frequency table for the set of data: 53, 88, 25, 47, 50, 18, 15, 43 a.) 4b.) 5c.) 10

c.) 10

Explain the difference between the scale and the interval of a frequency table.

 The scale is the set of all possible values of a given measurement, including the least and greatest numbers in the set.  The interval is the difference between successive values on a scale.

Choose an appropriate scale and interval for the following data: 245, 144, 489, 348, 36, 284, 150, 94, 220

Possible Answer Scale: Interval: 100

Make a Frequency Table for the following set of data: 53, 88, 25, 47, 50, 18, 15, 43

Possible Answer: AmountTallyFrequency | |||| | ||

Make a Bar Graph for the following set of data: Favorite ColorFrequency Yellow Green Brown Purple Blue

Possible Answer:

Make a Line Graph for the following set of data: DayAbsences Monday Tuesday Wednesday Thursday Friday

In your own words, describe when it is appropriate to use a bar graph and when it is appropriate to use a line graph.

A bar graph is used to compare the frequencies of different categories of data. A line graph is used to compare the change over a period of time.

Would you use a bar graph or a line graph to show the date below? EXPLAIN weight of a dog in each month from birth to one year of age

LINE GRAPH because it show the change in the weight of the dog over a period of time.

Would you use a bar graph or a line graph to show the date below? EXPLAIN average snowfall in February in six New York cities

BAR GRAPH because the information is showing the comparison of the snowfall in six different NY cities.

Explain how to calculate the mean, median, mode, and the range of a set of data.

 Mean – the sum of the numbers in a set of data divided by the number of pieces of data.  Median – the middle number in a set of data when the data are arranged in numerical order.  Mode – the number(s) or item(s) that appear most often in a set of data.  Range – the difference between the highest and lowest numbers in a set of data.

What do you do if there are two middle in a set of data when you are trying to find the median?

To find the median when there are two middle numbers, add the two numbers and divide the sum by 2.

Find the mean, median, mode, and range for the following list of values: 13, 18, 13, 14, 13, 16, 14, 21, 13

mean: 15 median: 14 mode: 13 range: 8

Use the clues to find the missing data. (Assume that the data items are listed in order from least to greatest.) Clues: median = 120 and range = , 112, ___, 124, 136, ___

110, 112, , 136, 156

Use the clues to find the missing data. (Assume that the data items are listed in order from least to greatest.) Clues: mean = 13, median = 13, and mode = 13 ___, 9, 12, ___, 18, ___

6, 9, 12, 14, 18, 19

Describe two ways in which a graph can be misleading.

 missing title or labels  inappropriate scale and/or interval  inappropriate type of graph for data

 Missing Title  Missing labels on both axes

Name two things that are missing from the following bar graph.

Tell whether the mean, median, or mode would best describe the set of data. EXPLAIN. Favorite ice cream flavor

The mode would be most appropriate because it would show the flavor that appears most often.

Tell whether the mean, median, or mode would best describe the set of data. EXPLAIN. 42,360; 51,862; 47,650; 23,400; 52,961

The median would be most appropriate because there is data that is much lower than others within the set.

Tell whether the mean, median, or mode would best describe the set of data. EXPLAIN. 627, 452, 573, 602, 498

The mean would be most appropriate because there aren’t any numbers that much larger or smaller than the rest of the data.

(7,4) Is the 4 the x-coordinate or the y-coordinate?

y-coordinate

When graphing an ordered pair, which axis do you move on first?

x-axis

What is the name for the point (0,0)?

ORIGIN

Name the ordered pair for each colored point on the coordinate plane.

BLUE: (4,1) GREEN: (1,4) YELLOW: (5,6) RED: (2,5)

Which graph shows the ordered pair (-4, 3) on the coordinate plane?

Graph 1