Classify a Random Sample A shopping mall wants to know if they should put a movi

Question

Classify a Random Sample A shopping mall wants to know if they should put a movie theater in the mall. Every hour, the mall manager questions 20 of the people coming into the mall. a. Identify the sample and population from which it was selected. b. Classify the sample as simple, stratified, or systematic. Identify Sample as Biased or Unbiased a. A sub sandwich store owner wants to make sure that his employees are weighing the meat correctly to put on the sandwiches. He watches the meat being weighed for one hour during the day. Classify the sample as biased or unbiased. b. Every tenth student entering the school is surveyed to determine the favorite classes at school. Classify the sample as biased or unbiased. Identify and Classify a Biased Sample A fast food restaurant is testing a new food item. To test if the customers are satisfied, the store owner asks the first 15 customers of the day if they would purchase the item. a Identify the sample and population from which it was selected. b. Classify the sample as a convenience sample or a voluntary response sample

Explanation / Answer

Classify a Random Sample

Ans a):           

Here sample is a group of 20 shoppers at the mall, every hour.

Population will be all mall customers.

Ans b):

Systematic random sample because the people questioned are chosen according to a time interval.

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Identify Sample as Biased or Unbiased

Ans a):

Biased because he is watching only one employee for only one hour during the day.

Ans b):

Unbiased sample because it is a random systematic sample and the sample is chosen using a specified interval.

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Identify and Classify a Biased Sample

Ans a):

Sample is the first 15 customers of the day at the fast food restaurant.

The population is all customers of the fast food restaurant.

Ans b):

This represents a convenience sample because this involves a population that is easily accessed.

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