Paying for purchases One day a store tracked the way shoppers paid for their purchases.
Their data are summarized in the table. 
a. What percent of men paid cash?
b. What is the conditional relative frequency distribution of payment method for women?
c. If you wanted to show the association between gender and method of payment visually,
what kind of graph would you make? (Just name it.)
d. Is there evidence of an association between gender and method of payment? Explain
briefly.
Definitions:
Peritubular Capillaries
Tiny blood vessels that surround the tubules in the kidney, involved in reabsorption and secretion during urine formation.
Efferent Arteriole
A small blood vessel that leads away from the glomerulus of the kidney after filtration has occurred, playing a role in regulating blood pressure and filtration rate.
Cortical Radiate Vein
Veins within the kidney that transport blood away from the nephrons.
Transitional Epithelium
A type of epithelial tissue that can stretch and change shape, found mainly in the urinary system.
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