If we ask 500 individuals whether they have credit card and if we consider the probability of people having a credit card being normally distributed, then we assume that, considering 30% do not have a credit card, everyone who is within 1SD of the mean will have a credit card, while the remaining ~15% on either tail of the distribution do not.
Answer:
49
Step-by-step explanation:
100- 51 = 49
The coefficient is 12a because it has a variable (a).
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