### 12-3: TEKS Practice

• 1. Employees at a water park surveyed customers at the smoothie stand to find out how many customers like to ride their newest water slide.

• a. Identify the sampling method they used.

• A. Convenience sampling

• B. Simple random sampling

• C. Systematic sampling

• b. Does the description produce a representative sample?

• 2. Lydia assigns numbers to outcomes as shown for a simulation. What situation might she want to simulate?

Use numbers from 1 to 100.

• A. The outcome of a shot by a player that misses 21% of all baskets attempted

• B. The outcome of a shot by a player that misses 79% of all baskets attempted

• C. The outcome of a shot by a player that makes 80% of all baskets attempted

• D. The outcome of a shot by a player that makes 21% of all baskets attempted

• 3. In a town, 60% of registered voters vote regularly. The random numbers below represent 10 trials for a simulation. Use the simulation to estimate the probability that the next two people who are asked whether they vote, do vote regularly.

(7,9) (1,1) (7,8) (4,9) (9,1) (4,3) (7,0) (3,6) (3,3) (4,1)

• a. Which of the following assigned numbers, for people who do vote and don't vote, can be used for the simulation model?

• A. Do Vote: 0 to 4 Don't Vote: 5 to 9

• B. Do Vote: 0 to 9

• C. Do Vote: 0 to 6 Don't Vote: 7 to 9

• D. Do Vote: 0 to 5 Don't Vote: 6 to 9

• b. Estimate the probability using the simulation.

• 4. Company Z wants to administer a satisfaction survey to its current customers. Using their customer database, the company selects 50 customers at random and asks them about their level of satisfaction with the company.

• a. Identify the sampling method that is being used.

• b. Describe another method Company Z could use to survey its current customers. Identify the sampling method used in your description.

• 5. Reasoning The school cafeteria wants to add chicken nuggets to the lunch menu. The staff surveyed every ninth faculty member entering the school to find out how many students like this idea.

• a. Identify the sampling method they used.

• b. Does this method produce a representative sample?

• A. No, because faculty members are not representative of the student population.

• B. Yes, because faculty members are not representative of the student population.

• C. No, because faculty members are representative of the student population.

• D. Yes, because faculty members are representative of the student population.

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