Suppose you are researching the eating habits of people your age. What sampling method
could you use to find the percent of students in your grade who eat five servings of fruit and
vegetables each day? What is an example of a survey question that does not have bias?
I have the second part of the question, but I am not sure what sampling method could be used. My new sampling question would be"What do you eat on a daily basis?" and it would ask every student in the first period.
Asking every student would be fine, if the would cooperate.
The number of servings are likely to vary throughout the week.
"What do you eat..." i s too vague.
"On average, how many servings of fruit or vegetables do you have each day? Circle one.
1 2 3 4 5"
To determine the percent of students in your grade who eat five servings of fruit and vegetables each day, you can use a sampling method called stratified random sampling. Here's how you can go about it:
1. Start by dividing the population (all the students in your grade) into mutually exclusive groups or strata based on a relevant characteristic. For example, you could divide them into groups based on gender, age, or any other characteristic that you think may influence eating habits.
2. Determine the sample size you wish to survey. This will depend on the desired level of accuracy and feasibility given the resources and time available to you.
3. Randomly select a proportional number of students from each stratum to ensure the sample represents the overall population accurately. For example, if the population is evenly divided between males and females, you would randomly select an equal number of male and female students from the sample.
4. Survey the selected students by asking questions related to their eating habits, specifically focusing on the number of servings of fruits and vegetables they consume each day.
Regarding your survey question, "What do you eat on a daily basis?", it is a good open-ended question that can provide valuable information about eating habits. However, it does not directly capture the information you are specifically interested in - the number of servings of fruits and vegetables consumed each day.
To ensure a question is unbiased, it should not lead the respondents towards a particular answer or contain any suggestive language. A better survey question that does not have bias and directly addresses your objective could be:
"Do you consume five or more servings of fruits and vegetables per day? Please choose one of the following options:
1. Yes
2. No
3. I don't know"
This question allows for a straightforward response without implying any desired answer or bias.
To find the percent of students in your grade who eat five servings of fruit and vegetables each day, you could use a stratified random sampling method. Here's how you could go about it:
1. Start by dividing your grade into different strata based on relevant criteria. For example, you could divide them into genders or different classes.
2. Within each stratum, randomly select a representative sample of students. This can be done using a random number generator or by pulling names from a hat, ensuring that every student in that stratum has an equal chance of being selected.
3. Conduct a survey or interview with the selected students to gather information about their eating habits, specifically focusing on the number of servings of fruit and vegetables they consume each day.
4. Once you have collected the data, calculate the percentage of students who eat five servings of fruit and vegetables each day.
Regarding the survey question that does not have bias, your question "What do you eat on a daily basis?" can be a good starting point. However, to avoid potential bias, it would be better to specifically ask about the number of servings of fruit and vegetables consumed. For example:
"On an average day, how many servings of fruit and vegetables do you consume?"
This question is unbiased because it does not lead or influence the respondent's answer and focuses specifically on the number of servings consumed, rather than asking about their entire diet.