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Section 1.1 – Introduction to the Practice of Statistics

Section 1.1 – Introduction to the Practice of Statistics. Examples. Qualitative vs. Quantitative.

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Section 1.1 – Introduction to the Practice of Statistics

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  1. Section 1.1 – Introduction to the Practice of Statistics Examples

  2. Qualitative vs. Quantitative Researcher Elisabeth Kvaavik and others studied factors that affect the eating habits of adults in their mid-thirties. (Source: Kvaavik E, et. al. Psychological explanatorys of eating habits among adults in their mid-30’s (2005) International Journal of Behavioral Nutrition and Physical Activity (2)9.) Classify each of the following variables considered in the study as qualitative or quantitative. a. Nationality b. Number of children c. Household income in the previous year d. Level of education e. Daily intake of whole grains (measured in grams per day) Qualitative Quantitative Quantitative Qualitative Quantitative

  3. Qualitative vs. Quantitative • Type of wood used to build a kitchen table. (b) Number of yards Tiger Woods hits his drives. (c) Number of times your Internet service goes down in the next 30 days. (d) Model of Dodge truck. Qualitative Quantitative Quantitative Qualitative

  4. Continuous vs. Discrete Researcher Elisabeth Kvaavik and others studied factors that affect the eating habits of adults in their mid-thirties. (Source: Kvaavik E, et. al. Psychological explanatorys of eating habits among adults in their mid-30’s (2005) International Journal of Behavioral Nutrition and Physical Activity (2)9.) Classify each of the following quantitative variables considered in the study as discrete or continuous. a. Number of children b. Household income in the previous year c. Daily intake of whole grains (measured in grams per day) d. Years of education. Discrete Continuous Continuous Discrete

  5. Continuous vs. Discrete (a) Number of yards Tiger Woods hits his drives. (b) Number of times your Internet service goes down in the next 30 days. (c) Number of students with brown green eyes. (d) The height of students in this classroom. Continuous Discrete Discrete Continuous

  6. Level of Measurement A study was conducted to assess school eating patterns in high schools in the United States. The study analyzed the impact of vending machines and school policies on student food consumption. A total of 1088 students in 20 schools were surveyed. (Source: Neumark-Sztainer D, French SA, Hannan PJ, Story M and Fulkerson JA (2005) School lunch and snacking patterns among high school students: associations with school food environment and policies. International Journal of Behavioral Nutrition and Physical Activity 2005, (2)14.) Classify each of the following variables considered in the study as qualitative or quantitative. Determine whether the quantitative variables are discrete or continuous. a. Number of snack and soft drink vending machines in the school • Whether or not the school has a closed campus policy during lunch • Class rank (Freshman, Sophomore, Junior, Senior) d. Number of days per week a student eats school lunch Ratio Nominal Ordinal Ratio

  7. All together – Impact of Vending Machines on School Lunches Quantitative, Discrete, Ration • Number of vending machines in our school. • Whether or not the school has a closed campus policy during lunch. • Whether the vending machines are off during lunch. • Number of days per week a student eats school lunch. • Class rank (frosh, soph, etc) • Today’s high temperature. Qualitative, Nominal Qualitative, Nominal Quantitative, Discrete, Ration Qualitative, Ordinal Quantitative, Continuous, Interval

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