Statistics chapter 1

Give the boundaries of the given value 3.089

3.0885-3.0895

Determine which of the following describes qualitative data A. The make of the car with license plate number VNS-862 B. The license plate number VNS-862 C. The number of vehicles whose license plate number begins with "VNS"

A and B

Determine which of the following describes nominal data A. My favorite days of the week or Friday Saturday and Tuesday B. My favorite day of the week is Friday my second favorite is Saturday and third favorite is Tuesday

A only

Which one of the following data are discrete A. The preseason ranking of duke university's men's basketball team B. The average height of players on the University of Connecticut women's basketball team C. The average preseason ranking of the University of Connecticut women's basketball team over the past 10 years D. The height of the tallest player on the duke university's men's basketball team

A only

Which of the following correctly describes the relationship between a sample in a population

A sample is a group of subjects selected from a population to be studied

Determine which of the following describes quantitative data A. The length of an object in feet B. The speed of an object in meters per second C. The number of objects that are blue

A,B, and C are correct

What is the best description of a double-blind experiment

An experiment in which neither the investigators nor the subjects know how the treatments have been assigned

How do you best describe a randomized experiment

An experiment in which the treatments are assigned randomly to experimental units

Determine which of the following describes qualitative data A. The volume of a shipping container in gallons B. The name of the material from which the container is made C. The shape of the container

B and C

Which one of the following data are continuous A. The number of musicians performing on the MP3 file B. The time remaining for an MP3 music download C. The number of times the file has been downloaded D. All of these represent continuous data

B only

Determine which of the following describes quantitative data A. The name of a chemical sample B. The mass of a chemical sample C. The color of a chemical sample

B. The mass of a chemical sample

Determine which of the following describes nominal data A. Michelangelos sell small medium large and jumbo pizzas B. Michelangelos most requested toppings or pepperoni black olives and mushrooms

Both A and B

Determine which of the following describes ordinal data A. In the horse race Betty's girl won Mr. Ed placed and Wabash showed B. In the horse race I bet on Betty's girl to win Mr. Ed to place and Wabash to show

Both A and B

Which one of the following data are discrete A. The speed of the boats propeller in revolutions per minute B. The latitude and longitude of a boat at sea C. The number of crewmembers on the boat D. The latitude and longitude of the boats port of departure

C only

A magazine test a New car and reports that it could be twice as much fun to drive. This is not an example of

Changing the subject

...................... sampling is used when the population is large and it includes subjects residing a very large geographic area

Cluster

By visiting homes door to door , a municipality surveys all the households in 146 randomly selected neighborhoods to see how residence feel about a proposed property tax increase identify the type of sample that is being used

Cluster sample

Statistics is the sience of conducting studies to.....

Collect, organize, summarize analyze and draw conclusions from data

The amount of time needed to run the Boston marathon is an example of which type of variable

Continuous

A.................... makes it difficult to determine whether an experimental outcome is due to the applied treatment

Counfounder

Which one of the following data are continuous A. The rankings of the trees from most numerous to least numerous B.The Number of representatives of each species in the park C. The number of species of trees in a park D. The average height of a sample of trees

D only

Each value in a data set may be referred to as either a data value or a

Datum

In which branch of statistics would a researcher acquire twenty-five 2000 Toyota celicas Drive them until they had a major mechanical failure record the final mileage and then write a report for car and driver

Descriptive statistics

And advertisement for a pick up truck states that it is 30% more powerful. This is an example of............

Detached statistics

In an advertisement for a car, hey driver is shown driving expertly through a difficult road course. At the bottom of the ad, The following is included in small print "professional driver on a closed course". What best describes this misuse of data?

Detached statistics

A ........... variable assumes values that can be counted

Discrete

If a researcher manipulates one of the variables and tries to determine how the manipulation influences other variables the researcher is conducting what kind of study

Experimental study

An Independent variable can also be called......

Explanatory variable

A persons hair color would be an example of a quantitative variable true or false

False

Based on her electric bills from last year miss Smith expects she will be paying $75 a month this year this is an example of descriptive statistics true or false

False

In a research study it is always preferable for the researcher to carefully choose his participants rather than randomly select them from a suitable group true or false

False

Quantitative data can be further classified as continuous or nonsequential true or false

False

The Number of birds in a tree is an example of a continuous variable true or false

False

The four basic methods used to obtain samples are:random, irregular,cluster,and stratified sampling true or false

False

One advantage of a.................... Study is that it occurs in a natural setting without intervention by the researcher

Observational

.................... is a decision-making process for evaluating claims about a population based on information obtained from samples

Hypothesis testing

In an experimental study manipulation of the................... variable is studied to see if it leads to changes in the..................variable

Independent......dependent

Which branch of statistics would employ probability to predict how many miles one should be able to drive a 2000 Toyota celica during its lifetime

Inferential statistics

What level of measurement would be applied when doing a survey on the average American's shoe size

Interval level of measurement

Determine which of the following describes ordinal data A. My best friends or Georgia Amy and mike B.my favorite Numbers or 2, 7 and 13

Neither A or B

Classifying the fruit and I basket as apple orange or banana is an example of the ....... level of measurement

Nominal

What level of measurement classifies data into mutually exclusive categories in which no order or ranking can be imposed on the data

Nominal

The .................. level of measurement classifies data into categories that can be ranked; however precise differences between the ranks do not exist

Ordinal

A.................. consists of all subjects that are being studied

Population

When rolling two six- sided dice your total roll ranges from 2(double ones) to 12 (double sixes). Characterize the nature of the roll total.

Quantitative and discrete

In a true experimental study the subjects should be assigned to groups randomly if this is not possible in a researcher uses intact groups they are performing a...........

Quasi-experimental study

If a weather center monitors and calculates the average number of tornadoes that pass through Topeka Kansas each year what type of variable would they be investigating

Random variable

Variables with values that are determined by chance are called

Random variables

In an experiment subjects are put into two categories according to sex and then each subject is randomly assigned a treatment. this is an example of.........

Randomized blocking

Determining the number of people from the state of Alaska who voted for a Republican in the last election is an example of..............measurement

Ratio

What level of measurement allows for the ranking of data,a precise difference between units of measure ,and also includes a true zero?

Ratio

A middle school student passes out leaflets to the adults at a school function. The leaflets ask the recipient to indicate whether they believe in global warming. The bottom of the leaflet indicates that the completed leaflet should be returned to the student. identify the kind of sample that is being used

Sample of convenience

The names of all 106 students in a professors class arewritten on identical slips of paper and the slips are placed into a large glass jar. Then the professor selects 11 random slips from the jar. Identify the kind of sample that is being used

Simple random sample

A pollster randomly samples 135 democrats 164 Republicans and 16 independents (all registered voters) in metro city and ask each pole participant which mayorial candidate he or she prefers. What kind of sampling is the pollster using

Stratified sample

What type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed

Stratified sampling

A television station interviews five movie viewers after The first showing of a movie. After finding out that all five enjoyed the movie very much, The reporter states that this movie will definitely be a big hit. This is an example of............

Suspect samples

And electronics manufacturer test every 1000th cell phone to verify that it is functioning properly. Identify the type of sample that is being used

Systematic sample

Describe the relationship between confounding, dependent and independent variable's

The confounding variable influences the dependant variable but is not separated from the independent variable

In a randomized experiment if there are large differences in outcomes Among the treatment groups we can conclude that the differences are due to

The treatments

How are statistics important in our everyday lives, and why do we need to understand them

To analyze the results of surveys to understand the terms and concept so that one can understand exactly what is being represented or misrepresented

A dependent variable can also be referred to as an outcome variable true or false

True

Inferential statistics is based on probability

True

Questioning every 14th customer leaving a theater about the movie they have seen would be an example of systematic sampling true or false

True

Rating a restaurant by a number of stars is an example of an ordinal level of measurement true or false

True

The variable of height is an example of a quantitative variable true or false

True

When running an experimental study the group that is manipulated can be called the treatment group true or false

True

A ................. is a characteristic or attribute of a subject that can assume different values

Variable

What sample type should you always regard as unreliable

Voluntary response samples