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Chapter 12: Q16. (page 737)
Write each fraction as a percent. Round to the nearest tenth.
The fraction as a percent is .
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Identify each sample, and suggest a population from which it was selected. Then classify the sample as simple, stratified, or systematic. Explain your reasoning.
At a popular hamburger restaurant, the manager checks the quality of the burgers every 20 minutes, starting at a randomly selected time.
Identify each sample, and determine a population from which it was selected. Then classify the type of data collection used.
The owners of the dog care centers want to know how many of each size crate they should order. They send flyers into the neighborhood to ask what size or breed of dog each person has.
One card is randomly drawn from a standard deck of 52 cards. Find the probability.
P(10 or spade)
Identify each sample as biased or unbiased. Explain your reasoning.
A clothing chain gives its customers a card they can mail back that asks them questions about the customer’s favorite brand of jeans.
The results of a simulation of coin flipping are shown.
Outcome | Frequency |
heads | 25 |
tails | 75 |
What is the theoretical probability of heads?
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