a high schools student newspaper plans to survey local businesses about the importance of students as customers. from a telephone book listing, the newspaper staff decides to randomly call every 12th business. from the survey, 8 out of 10 businesses value high school students business. what is the population of the study? select an answer what is the sample statistic of the study? select an answer what is the population parameter of the study? select an answer what is the sample of the study? select an answer is this situation best described as an experimental study or an observational study? explain your reasoning. select an answer is the sampling method best described as convienience, stratified, systematic, or simple random sampling? select an answer

Question

Accepted Answer

### 1. What is the population of the study?
# Brief Explanations:
The population in a study is the entire group about which we want to draw conclusions. Here, the study is about local businesses' views on students as customers, so the population is all local businesses.
# Answer:
All local businesses

### 2. What is the sample statistic of the study?
# Brief Explanations:
A sample statistic is a measure calculated from the sample. The sample here has 8 out of 10 businesses valuing students' business, so the sample statistic (proportion) is $\frac{8}{10} = 0.8$ (or 80%).
# Answer:
The proportion of businesses in the sample that value high school students' business, which is $\frac{8}{10}$ (or 0.8, 80%).

### 3. What is the population parameter of the study?
# Brief Explanations:
A population parameter is a measure that describes the entire population. Here, it would be the proportion of all local businesses that value high school students' business (we don't know its exact value, but it's what we want to estimate from the sample).
# Answer:
The proportion of all local businesses that value high school students' business

### 4. What is the sample of the study?
# Brief Explanations:
The sample is the group from which we collect data. The newspaper staff called every 12th business from the telephone book, so the sample is the businesses that were called (every 12th business from the telephone book listing of local businesses).
# Answer:
The businesses that were called (every 12th business from the telephone book listing of local businesses)

### 5. Is this situation best described as an experimental study or an observational study? Explain your reasoning.
# Brief Explanations:
In an observational study, we observe and measure variables without manipulating them. Here, the newspaper is just surveying businesses (observing their views) and not imposing any treatment or intervention. So it's an observational study.
# Answer:
Observational study. Reasoning: The researchers are only observing (surveying) the businesses' views on students as customers and not manipulating any variables (like assigning different treatments to businesses).

### 6. Is the sampling method best described as convenience, stratified, systematic, or simple random sampling?
# Brief Explanations:
Systematic sampling involves selecting every k-th element from a list. Here, the newspaper is calling every 12th business from the telephone book, which fits the definition of systematic sampling (k = 12).
# Answer:
Systematic sampling

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Question

Explanation:

1. What is the population of the study?

Answer:

2. What is the sample statistic of the study?