SUBJECT: STATISTICAL ANALYSIS W/ SOFTWARE APPLICATIONS

Topic: Definitions and Concepts of Statistics

SHOW YOUR COMPLETE SOLUTION.

I.Population and Sample

According to a Harris Interactive study of 2276 individuals in the United States, 33% of those polled never fly commercially.

1.Determine the population.

2.Determine the sample size.

3.Is the 33% figure a statistic or a parameter?

II.Quantitative and Qualitative

Determine if the following are quantitative or qualitative data.

1.Platelet Counting

2.The tobacco manufacturers

3.NIPS candies come in a variety of colors.

4.The amount of NIPS candies included in each pack.

III.Discrete and Continuous Data

Determine if the following are discrete or continuous data.

1.The number of persons examined for the National Health and Nutrition Examination Surveys throughout the next several years.

2.A random selection of statistics students' exact foot lengths (measured in centimeters).3.The precise times that randomly chosen drivers spent texting while driving in the previous seven days.4.Researchers record the quantities of weight acquired by randomly selected students in a study on weight gains by college students in their first year.

IV.Measurement Scale

Determine if the following are nominal, ordinal, interval,and ratio.

1.U.S. News & World Report publishes its national rankings on a regular basis.Princeton, Harvard, and Yale were ranked first, second, and third, respectively, in a recent year.

2.A researcher records the time intervals of drive-up customers beginning when they place their order and ending when they receive their order in a study on fast food service times.

3.NIPs' colors (red, orange, yellow, brown, blue, green)ina box.4.Baseball statistician Bill James keeps track of the years in which a National League team wins the World Series.

V.Analysis

According to a poll of 1020 individuals in the United States, 45% wash their hands after using public transit (based on data from KRC Research).

1.Identify the sample.

2.Identify the population.

3.What does the dataset consist of?

4.Is the value of 45% a statistic or parameter?

5.What is the measuring level for the value of 45%? (nominal, ordinal, interval, and proportion).

6.Is the number of respondents in these surveys discrete or continuous?