1..Determine whether the given value is a statistic or a parameter.

A homeowner measured the voltage supplied to his home ononedayaweekforagivenyear, and the average(mean) value is 145.6 volts.

Choose the correct answer below.

A.

The given value is a statistic for the year because the data collected represent a sample.

B.

The given value is a parameter for the year because the data collected represent a sample.

C.

The given value is a statistic for the year because the data collected represent a population.

D.

The given value is a parameter for the year because the data collected represent a population.

2...Determine whether the given value is from a discrete or continuous data set.

The time it takes a computer to complete a task

Continuous

Discrete

3....The similarity between an ordinal level of measurement and an interval level of measurement is that________.

A.

differences between data values can be determined and are meaningful

B.

differences between data values cannot be determined or are meaningless

C.

neither can be arranged in some order

D.

both can be arranged in some order

4...Determine which level of measurement is appropriate.

Salaries of college professors

A.

Ratio

B.

Nominal

C.

Ordinal

D.

Interval

5..An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools. Does this sampling plan result in a randomsample? Simple randomsample? Explain.

A.

The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is not a simple random sample because some samples are notpossible, such as a sample that includes teachers from schools that were not selected.

B.

The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is a simple random sample because all samples have the same chance of being selected.

C.

The sample is random because all teachers have the same chance of being selected. It is a simple random sample because all samples have the same chance of being selected.

D.

The sample is random because all teachers have the same chance of being selected. It is not a simple random sample because some samples are notpossible, such as a sample that includes teachers from schools that were not selected.

6..Identify the type of sampling that is used in this statement.

To avoid workinglate, a quality control analyst simply inspects the first 100 items produced in a day.

A.

Stratified

B.

Cluster

C.

Simple random

D.

Systematic

E.

Convenience

7..Identify the type of sampling that is used in this statement.

A production workder selects every 1000th item to check for defects.

A.

Systematic

B.

Stratified

C.

Random

D.

Cluster

E.

Convenience