Homework 1

Identify the scale of measurement for the following variable: Types of bicycles ridden by students in the freshman class. nominal ordinal interval ratio

nominal

Identify the scale of measurement for the following variable: Proficiency in mathematics graded in the categories of poor, fair, and good. nominal ordinal interval ratio

ordinal

Identify the scale of measurement for the following variable: The letter grade (A, B, C, D, or F) on your first exam of the semester. nominal ordinal interval ratio

ordinal

The average score for an entire population would be an example of a _______. parameter variable constant statistic

parameter

A researcher is curious about the average level of knowledge about fairy shrimp for high school seniors in the United States. The entire group of high school students in the U.S.A. is an example of a sample statistic population parameter

population

Although research questions usually concern a _______, the actual research is typically conducted with a _______. sample, population population, sample population, parameter sample, statistic

population, sample

Identify whether the following represents a quantitative or qualitative variable: Eye color.

qualitative

Identify whether the following represents a quantitative or qualitative variable: Religious affiliation.

qualitative

Identify whether the following represents a quantitative or qualitative variable: State of birth.

qualitative

Identify whether the following represents a quantitative or qualitative variable: Type of automobile owned.

qualitative

Identify whether the following represents a quantitative or qualitative variable: Grade point average (GPA)

quantitative

Identify whether the following represents a quantitative or qualitative variable: The amount of air pressure in a tire.

quantitative

Identify whether the following represents a quantitative or qualitative variable: The duration of a flight from Merced to New York.

quantitative

Identify whether the following represents a quantitative or qualitative variable: The weight of a shipment of Budweiser.

quantitative

Identify the scale of measurement for the following variable: Number of bicycles ridden by students in the freshman class. nominal ordinal interval ratio

ratio

Identify the scale of measurement for the following variable: The weight of a group of dieters. nominal ordinal interval ratio

ratio

A researcher weighs each individual in a sample of 25 laboratory rats and calculates the average weight for the group. The average weight is an example of a _______. variable constant parameter statistic

statistic

A recent study reports that infant rats fed a special donut-enriched diet reached an adult weight 10% greater than litter-mates raised on a regular diet. For this study, what is the independent variable? the type of diet given to the rats the rats given the regular diet the adult weight of the rats the rats given the donut-enriched diet

the type of diet given to the rats

Indicate whether the following situation involves descriptive or inferential statistics: A correlational study is conducted on a sample to determine whether educational level and income in the population are related.

inferential

The sample data from a poll are used to estimate the opinion of the population. inferential descriptive

inferential

Identify the scale of measurement for the following variable: The IQ of your teachers: nominal ordinal interval ratio

interval

In a study evaluating the effectiveness of a new medication designed to control high blood pressure, one sample of individuals is given the medicine and a second sample is given an inactive placebo. Blood pressure is measured for each individual. For this study, what is the dependent variable? blood pressure the placebo the indivs given the medication the medication

blood pressure

Identify whether the following represents a continuous or a discrete variable: Age of subjects in an experiment.

continuous

Identify whether the following represents a continuous or a discrete variable: Percentage of students in your class who are females.

continuous

Identify whether the following represents a continuous or a discrete variable: Speed of runners in a race.

continuous

Indicate whether the following situation involves descriptive or inferential statistics: A history instructor tells his class the number of students who received an A on a recent exam.

descriptive

Identify whether the following represents a continuous or a discrete variable: Number of doctor's visits in the past month.

discrete

Identify whether the following represents a continuous or a discrete variable: Number of females in your class.

discrete

Identify whether the following represents a continuous or a discrete variable: Number of words remembered.

discrete

Indicate whether the following situation involves descriptive or inferential statistics: The mean of a sample set of scores is calculated to characterize the sample.

discribtive

A researcher is interested in the relationship between caffeine consumption and activity level for elementary school children. A sample of 20 children is obtained and the children are separated into two roughly equivalent groups. The children in one group are given a drink containing 300 mg of caffeine and the other group gets a drink with no caffeine. The researcher then records the level of activity for each child during a 30-minute session on the playground. What type of study is this? qualitative correlational experimental quasi-experimental

experimental

In an experiment, the researcher manipulates the ______ variable and measures changes in the ________ variable. population, sample dependent, independent independent, dependent sample, population

independent, dependent