Sampling and Experimentation

Mrs. Horn samples her class by selecting every third person on her class list. Which type of sampling method is this?

• Simple

• Systematic

• Stratified

• Cluster

Ms. Nichol samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?

• Simple

• Stratified

• Systematic

• Cluster

Farmer Joe separates his apple tree farm into 10 regions.  He counts the number of apples produced in just one of the regions and uses that estimate to predict the number of apples produced on the whole farm.  This is _______ sampling.

• Simple
• Cluster
• Stratified
• Systematic

Farmer Joe separates his farm into 10 regions.  He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm.  This is _____________ sampling.  

• Cluster
• Systematic
• Stratified
• Simple

To find out what the preferred ice cream flavor is, wait outside an ice cream parlor and ask every 4th person leaving the store to name his or her favorite flavor until you get 25 responses is an example of...

• Convenience Sample
• Simple Random Sample
• Stratified Random Sample
• Systematic Sample

To study the amount of time students spend doing homework each day, use a random number generator to select 25 students from the student enrollment database to survey.

• Convenience Sample
• Simple Random Sample
• Stratified Random Sample
• Interval Sample

True or False: all samples lead to a good prediction about an entire population.

• True
• False

A researcher wants to find the average height of all her students in her classes. She decides to use the first 5 people who walk in the door. Is this a good representative sample?

• Yes

• No

What type of sampling is this? A journalist asks his family how they feel about water pollution.

• Random sample

• Convenience sample

• Stratified Random sample

• Census

What type of sampling is this? Soybeans are planted on a 48-acre field. The field is divided into one acre subplots. A sample of plants is taken from each subplot to estimate the harvest.

• Random sample

• Convenience sample

• Stratified Random sample

• Census