Introduction Of Statistical Data

  Primary data – data you collect

–         Example :

·         Surveys

·         Focus groups

·         Questionnaires

·         Personal interviews

·         Experiments and observational study

  Secondary data – data someone else has collected

–         Example :

·         County health departments

·         Vital Statistics – birth, death certificates

·         Hospital, clinic, school nurse records

·         Private and foundation databases

·         City and county governments

  Qualitative Data - Can be separated into different categories that are distinguished by some nonnumeric                characteristics

•       Deals with descriptions.

•       Data can be observed but not measured.

•       Colors, textures, smells, tastes, appearance, beauty, etc.

•       Qualitative → Quality

   Quantitative Data - Numbers representing counts or measurements

•       Deals with numbers.

•       Data which can be measured.

•       Length, height, area, volume, weight, speed, time, temperature, humidity, sound levels, cost, members,           ages, etc.

•       Quantitative → Quantity

Example 1:  Oil Painting Qualitative data: ·         red/green color, gold frame ·         smells old and musty    ·         texture shows brush strokes of oil paint ·         peaceful scene of the country ·         masterful brush strokes

Example 1:  Oil Painting Quantitative data: ·         picture is 10" by 14” ·         with frame 14" by 18” ·         weighs 8.5 pounds     ·         surface area of painting is 140 sq. in. ·         cost $300

Example 2:  Latte Qualitative data: *robust aroma *frothy appearance * strong taste *glass cup

Example 2:  Latte Quantitative data: *12 ounces of latte *serving temperature 1500 F. *serving cup 7 inches in height *cost $4.95

Example 3:  Freshman Class Qualitative data: *friendly demeanors *civic minded *environmentalists *positive school spirit

Example 3:  Freshman Class Quantitative data: *672 students *394 girls, 278 boys *68% on honor roll *150 students accelerated in mathematics