First Semester Final

Front

Sampling Technique: A poll on effective educational methods is taken by selecting 4 of the 10 departments at a local university and surveying all members in those groups. What type of sampling is this?

Back

Cluster sampling is used when entire groups are selected, rather than individuals.

Front

Sampling Techniques: A poll is completed by a local government and selects people to poll via their social security number. What type of sampling is this?

Back

Random sampling is used when every individual has an equal chance of being selected.

Front

Classify the data: The number of touchdowns the Eagles score each year. Is this data discrete or continuous?

Back

Discrete data is used for countable items, such as the number of touchdowns.

Front

What is the variance for the data given: 5, 10, 7, 12, 0, 20, 15, 22, 8, 2?

Back

The variance is 47.47, which measures how far a set of numbers are spread out from their average.

Front

Find the midrange for the following data: 12, 5, 9, 18, 22, 25, 5.

Back

The midrange is 15, calculated as (max + min) / 2.

Front

Define 'Cluster Sampling'.

Back

Cluster sampling involves dividing the population into groups (clusters) and randomly selecting entire clusters for the sample.

Front

Define 'Random Sampling'.

Back

Random sampling is a technique where each member of the population has an equal chance of being selected.

Front

What is 'Discrete Data'?

Back

Discrete data consists of distinct or separate values, often counts of items.

Front

What is 'Continuous Data'?

Back

Continuous data can take any value within a given range, often measurements.

Front

How do you calculate variance?

Back

Variance is calculated by finding the average of the squared differences from the mean.