Sampling Techniques and Experimental Design

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

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

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

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

Sampling Technique: A toy manufacturer selects every 4^th toy to inspect on a production line to test for defects.

• Stratified

• Cluster

• Systematic

• Convenience

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.

• Systematic

• Stratified

• Cluster

• Convenience

Identify the sampling technique. A lobbyist for a major airspace firm assigns a number to each legislator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the legislators corresponding to these numbers.

• random

• stratified

• systematic

• convenience

• 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 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

Sra. Garces 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