Statistics Homeworks

Only available on StudyMode
• Published : April 14, 2013

Text Preview
Example Sheet 1

|1. Which statement below is false?[pic] | |A. Data that can only be classified into categories is referred to as nominal or ordinal level of measurement | |B. Zip codes are an example of qualitative data. | |C. The number of robberies reported in a city is an example of discrete data. | |D. A sample is a collection of all-possible individuals, objects or measurements of interest. |

|2. Which one in the following is the quantitative data:[pic] | |A. The order that runners finish in a particular race | |B. Political party affiliation | |C. Zip codes of customers who make a purchase from a certain store | |D. Social security numbers of individuals | |E. None of these above |

|3. All of the following are examples of quantitative data except:[pic] | |A. Concentration (in parts per million) of a pesticide | |B. Weight of a certain species of fish found in a river | |C. Length of a certain species of fish found in a river |

D. The river/lake where a fish was captured

4. Managers study the number of days per month over the last year that employees in the payroll department called in sick to determine the averages they can expect next year. Collecting the data and determining the averages last year is an example of what type of statistics? Determining the averages they can expect next year is an example of what type of statistics? A. They are both examples of inferential statistics because averages are inferred in both instances. B. Inferential statistics; descriptive statistics.

C. They are both examples of descriptive statistics because they deal with analyzing data. D. Descriptive statistics; inferential statistics.

5. The grades that a random sampling of students in the psychology degree program received over the last decade of "Abnormal Psychology" classes are an example of what statistical concept? A. The grades are an example of a parameter.

B. The grades are an example of a sample.
C. The grades are an example of a population.
D. The grades are an example of a statistic.

6. What method is used to sample a population so that it is representative of the population? A. All but the samples that appear to have the lowest and highest values are selected. B. Samples are chosen at random from the population.

C. Every other element in a population is chosen.
D. Only the first half of a population is selected.

7. Look at the survey questions that Good Tunes sent to their customers. What kind of variables and scales of...