Consider the following to answer the question(s) below:
The option to buy extended warranties is commonplace with most electronics purchases. Does the type of purchase affect a consumer's willingness to pay extra for an extended warranty? Data for 420 consumers who purchased digital cameras and laptop computers from a leading electronics retailer are summarized in the table. 
-ASW, a regional shoe chain, has recently launched an online store. Sales via the Internet have been sluggish compared to their brick and mortar stores, and management suspects that its regular customers have concerns regarding the security of online transactions. To determine if this is the case, they plan to survey a random sample of their regular customers. Under consideration are several plans for selecting the sample. Name the sampling strategy for each.
a. Regular customers belong to a rewards program and have a customer rewards ID number. Randomly select 100 numbers.
b. ASW has stores in five different cities in Canada. Randomly select one of the stores and survey all regular customers that belong to its rewards program.
c. ASW has an alphabetized list of regular customers who belong to their rewards program. After randomly selecting a customer on the list, every 25th customer from that point on is chosen to be in the sample.
d. Customers who belong to the rewards program are grouped into four age categories (under 21, 21 to 35, 36 to 50, and over 50). Randomly select 10 regular customers in each age category.
Definitions:
Relaxation
The state of being free from tension and anxiety, or the act of making something less tight.
Sinusoidal Capillaries
Specialized blood vessels with large, irregularly shaped lumens found in the liver, spleen, and bone marrow, facilitating the exchange of materials between blood and tissues.
Continuous Capillaries
A type of blood capillary with a continuous endothelium, allowing for the controlled exchange of water, small solutes, and lipophilic molecules.
Venous Sinuses
Large channels in the brain that collect venous blood and drain it into the jugular veins.
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