Unit 4 Test Review

Explain the process of conducting simple random sampling.

• Randomly selecting individuals from a population to form a sample.

• Selecting individuals based on their age from a population to form a sample.

• Picking individuals who are known to have a certain characteristic from a population to form a sample.

• Choosing individuals who are friends with each other from a population to form a sample.

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 

• experiment

• simple random sample
• convenience
• volunteer response

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CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.MD.B.6

Which of the following methods would ensure simple random sampling?

• Asking every third person on a roster.

• Selecting participants from a specific subgroup.

• Using a random number generator to pick participants.

• Choosing participants based on height or gender.

Which of the following would disqualify a sample as being a simple random sample?

• Selecting participants using a computer program

• Ensuring as many,

  if not all, members of the population are included in the pool

• Using a method where some individuals are more likely to be selected than others

• Drawing names randomly from a hat

As the sample size of a study increases, the spread or 'variability' of the estimates will (a)   .

What does sampling variability mean?

• The consistent results obtained when similar samples are drawn from different populations

• The natural tendency that each random sample will produce a different estimate

• The subjects in an experiment that negatively affect the accuracy of sample results

• The errors that occur due to incorrect data collection methods

The steps on how to select a simple random sample include :

• Labeling each individual in the study with a number

• Using repeating numbers or previously chosen individuals again to ensure consistency

• Randomizing the selection process by using a random # generator or by picking a number out of a hat

• Selecting individuals based on the numbers picked

Does increasing your sample size also lead to a closer or more accurate representation of the population?

• Yes, because adding more samples decreases your sampling variability.

• Yes, because adding more people/samples will influence the study in a way that the researcher would prefer

• No, because the results will stay the same regardless of sample size

• No, because this will negatively impact the results of the initial estimations

The manager of a book store wants to see if the store should expand its hours, so he surveys the customers who buy mystery novels.  What is the population?

• All customers who visit the bookstore.

• Customers who buy mystery novels.

• All Residents of the town

• All People who like to read.

Identify the Sample:
A restaurant wants to know if customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.

• 20 customers
• All customers
• 8 customers
• Dessert

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.B.5