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Concept explainers
To check: Whether the conclusion made by the store manager is valid.
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Answer to Problem 12IP
The manager’s conclusion is valid.
Explanation of Solution
Given information: The customers are randomly selected and the data surveyed on milk preference of the customers is given. The store manger decided 40% of milk is low fat milk.
Calculation:
The customers are chosen in a random manner. So, the sampling method is valid.
The number of customers preferring skim milk
The number of customers preferring low fat milk
The number of customers preferring whole milk
So total number of customers surveyed =
As 92 preferred low fat, the percentage of customers prefer low fat milk can be found by,
So, 38.3% prefer low fat milk. The store manager approximated it as 40%. Since the difference is low, the store manager’s conclusion can be accepted.
So his conclusion is valid.
Chapter 10 Solutions
Glencoe Math Accelerated, Student Edition
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