Stats practice chapter 1

The number of hours a group of 4 children in Mrs. Smith's kindergarten class play outside in a day.

All children in Mrs. Smith's kindergarten class

The heights of 14 out of the 28 okra plants at Mr. Lonardo's greenhouse.

All okra plants at Mr. Lonardo's greenhouse

The total weight of sugar imported by the United States each day for a year.

Are these data qualitative or quantitative? quantitative Are these data discrete or continuous? contniuous What is the highest level of measurement the data possesses? ratio

A recent poll of 1266 luxury car owners in Pennsylvania showed that the average price of a luxury car in the U.S. is $45,900.

Inferential Statistic

A recent poll of 1628 home owners in Ohio showed that the average price of a house in the U.S. is $322,000.

Inferential statistic

______ involves completely disclosing to participants the goals and procedures involved in the study and obtaining their agreement to participate.

Informed consent

To perform a research study, you need to obtain approval from an _______ .

Institutional Review Board

A town council studies fifteen newspaper articles about crime prevention.

Meta-analysis

The average price of a car at the new car dealership in town is $28,400.

Population parameter

The average price of a house in the new subdivision is $257,000.

Population parameter

The annual salaries of a sample of 34 parents of your classmates.

Population: All parents of your classmates Sample: 34 parents of your classmates

The number of times 15 out of 30 students on your floor order take-out in a week.

Population: The 30 students on your floor. Sample: The 15 students selected on your floor.

A non-sampling error is when results from a study are tabulated incorrectly. An error of this form is called a(n) _________ .

Processing error

Bank account numbers are an example of which type of data?

Qualitative

Names of TV shows taped in New York are an example of which type of data?

Qualitiative

Sales in dollars made by a sales person are an example of which type of data?

Quantitative

Widths of the doors in a restaurant are an example of which type of data?

Quantitative

______ occurs if a researcher intentionally chooses a favorable sample.

Researcher bias

The number of times 12 out of 28 students on your floor order fast food in a week.

Sample

The number of times 3 out of 39 students on your floor order buffalo wings in a week.

Sample

A recent poll of 1443 corporate executives showed that the average price of their cars is $48,900.

Sample statistic

A recent poll of 2883 home owners in West Virginia showed that the average price of their houses is $321,000.

Sample statistic

A survey of 1829 people in the U.S. revealed that 74% of those surveyed have a college degree.

Sample statistic

A survey of 459 people in the U.S. revealed that 62% of those surveyed eat while they drive.

Sample statistic

You order a pizza. The kind of pizza you order is recorded by entering the appropriate number on an order form. The numbers used are given below. 1) Pepperoni 2) Mushroom 3) Black Olive 4) Sausage

Are these data qualitative or quantitative? qualitative Are these data discrete or continuous? neither What is the highest level of measurement the data possesses? nominal

Five people are in a bakery waiting for service. Each person takes a ticket when they enter the bakery in order to determine when they will be served. The person with the lowest ticket number will be served next.

Are these data qualitative or quantitative? qualitative Are these data discrete or continuous? neither What is the highest level of measurement the data possesses? ordinal

The rankings of three books on the New York Times Best Sellers List.

Are these data qualitative or quantitative? qualititative Are these data discrete or continuous? neither What is the highest level of measurement the data possesses? ordinal

The IQ scores of students at the local college.

Are these data qualitative or quantitative? quantiative Are these data discrete or continuous? descrete What is the highest level of measurement the data possesses? interval

The number of days traveled last month by 100 randomly selected employees.

Are these data qualitative or quantitative? quantiative Are these data discrete or continuous? descrete What is the highest level of measurement the data possesses? ratio

Favoritism, partiality, and preconceived notions are types of _______ .

Bias

Your uncle calculates his average mileage, average travel time, and average time of arrival on his commute to work over the last five months.

Case study

For budget purposes, a secretary needs to know the average cost of health plans of faculty at their school.

Census

Gather data from each member of the population.

Census

A random number generator is used to choose twenty-five regions. Then a quality assurance analyst collects data from each person in these regions.

Cluster sampling

A statistics student interviews each member from each of the ten randomly chosen voting districts in a county.

Cluster sampling

Factors that influence the results of a study that the researcher did not, or could not, account for are known as _________ .

Cofounding variables

Widths of the doors in a restaurant are an example of which type of data?

Continuous

52% of all freshmen at your school reside on campus.

Descriptive statistic

75% of all students at the local university voted in the last election.

Descriptive statistic

The numbers of people in each statistics class at your school are an example of which type of data?

Discrete

The numbers of red cars on various roads are an example of which type of data?

Discrete

The numbers of telephone calls received in one day by each person in a company are an example of which type of data?

Discrete

In a _______ experiment, neither clinicians nor participants know whether the participant is in the control group or the treatment group.

Double-blind

If a participant begins a study but fails to complete it, then that participant is a(n) _______ .

Dropout

An underwriter compares five weather reports from hurricanes to compare for common factors.

Meta-analysis

Eye colors are an example of which type of data?

Neither

Hair color is which type of data?

Neither

A(n) _______ might be as simple as a typo in the data set, which is also known as a processing error.

Non-sampling error

A(n) ______ is a subject who strays from the directions they were given for the study, yet they remain in the sample.

Nonadherent

A deli cart entrepreneur wants to find out the average age of his clientele.

Observational

______ is/are created when there is a problem with either the participation, or lack of participation, of those chosen for the study.

Participation bias

The amount of money each person in your world history class spends renting movies in a week.

Population

The number of children of all the professors at the local college.

Population

______ can occur if the sampling frame excludes certain members of the population .

Sampling errors

An experiment in which only the participant does not realize whether they have been placed in the experimental or control group is _____.

Single-blind

A scientist chooses twenty people at random from each math class.

Stratified sampling

First, the population is subdivided by city. Then a quality assurance analyst uses a random number generator to select twenty-five members from each city to study.

Stratified sampling

The number of hours a group of 12 children in Mrs. Smith's kindergarten class sleep in a day.

The 12 children in Mrs. Smith's kindergarten class