Displaying Data Dot Plot Data values represented with

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Displaying Data

Displaying Data

Dot Plot Data values represented with a dot above a number line Shows frequency

Dot Plot Data values represented with a dot above a number line Shows frequency (how often data occurs) of data values Always include title and appropriate scale Used for smaller sets of data Outlier – data far from the other data – doesn’t really fit

Mrs. Ferrante surveyed her class and asked each student, “How many siblings do you

Mrs. Ferrante surveyed her class and asked each student, “How many siblings do you have? ” The results are displayed below. 0, 4, 2, 2, 3, 4, 8, 1, 0, 1, 2, 2, 3, 0, 3, 1, 1, 2 0, 0, 0, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 8 Mean 39 / 18 = 2. 2 How Many Siblings Do You Have? Median 2 Mode 2 Range 8– 0=8 Outlier 8 0 1 3 4 2 Number of Siblings 5 6 7 8

Histogram Bar style data display showing frequency of data measured over intervals (range of

Histogram Bar style data display showing frequency of data measured over intervals (range of data) rather than each individual data value Each interval width must be the same Always title the graph and label both axes Choose the appropriate scale on the x axis and the appropriate interval on the y axis Used for larger sets of data or continuous data.

A group of students were asked how long it took them to take a

A group of students were asked how long it took them to take a statistics exam. The data is shown below: 40. 3, 42. 4, 43. 2, 44. 1, 45. 0, 55. 7, 64. 3, 70. 3, 32. 3, 44. 4, 54. 5, 71. 3, 66. 1, 35. 8, 67. 2, 30. 0

Box Plots (Box and Whiskers) The Box Plot displays the five-number summary Shows Range

Box Plots (Box and Whiskers) The Box Plot displays the five-number summary Shows Range and Median of a set of data, NOT the mode or mean. Standardized way of displaying data based on the minimum, first quartile, median, third quartile, and maximum of the data set. Good for large sets of data, but good for numbers only. Good for comparing data Title your Box Plot and label your line

The time, rounded to the nearest hour, that 26 tourists spent on excursions in

The time, rounded to the nearest hour, that 26 tourists spent on excursions in Cat Island, Mississippi on a given day was recorded as follows. (Cat Island is not actually an island for cats. ) 0, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10, 11, 12 Minimum Q 1 Q 3 Median Time Tourists Spent on Cat Island 0 1 2 3 4 5 6 7 8 9 10 11 12 Hours on Cat Island Each Quartile represents 25% of the data Maximum