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7.93 Random Sampling? If you walked around your school campus and asked people you met how...
Let's say you want to poll a random sample of 150 students on campus to see...
Let's say you want to poll a random sample of 150 students on campus to see if they prefer to take online classes. Of course, if you took an actual poll you would only get one number (your sample proportion, p-hat). Imagine all the possible samples of 150 students that you could draw and the distribution of all the possible sample proportions you would get from them. If I told you that we know that 35% of all students actually...
A random sample of n = 100 elementary school students were asked how many summer camps...
A random sample of n = 100 elementary school students were asked how many summer camps they have been in a certain year. This sample yielded a mean of 3.2 and a standard deviation of 1.6. How many standard errors from the null hypothesis value of 3 is the sample mean of 3.2? 2.33 1.25 2.58 1.69
If a complete stranger walked up to you on the street and asked you for your...
If a complete stranger walked up to you on the street and asked you for your address and phone number, would you give it to him or her? You most likely have provided personal information to many websites and companies. What information have you provided to companies that you wish you had never disclosed? What types of information have companies asked you to provide that you believe was unnecessary? Using complete sentences list at least 3 pieces of information that...
You are a researcher working for an educational research firm. Your firm was asked to conduct...
You are a researcher working for an educational research firm. Your firm was asked to conduct a satisfaction survey among the parents of students attending the School District public schools. Your boss has asked you to develop a sampling design for this survey. For this survey, you are asked to select a representative sample of parents. When you answer the questions, keep the following in mind: Assume that you have unlimited authority to access all the information you may need...
You hypothesize that students in fraternities/sororities on your campus are more extroverted (on an introversion/extroversion scale)...
You hypothesize that students in fraternities/sororities on your campus are more extroverted (on an introversion/extroversion scale) than other students. To answer your research question, you need to obtain a sample of “Greek” students and a sample of “independent” students. For each of these two populations of students, how would you obtain simple random samples using the four steps described in this chapter? (The four steps 1. Defining the population, 2. Constructing a list, 3. Drawing the sampling, 4. Contacting members...
Imagine that you are asked to determine students’ opinions at your school about different types of...
Imagine that you are asked to determine students’ opinions at your school about different types of contraception or birth control methods. Describe how you could go about getting a sample of each of the following types: simple random sample, sample of convenience, voluntary response sample, stratified sample, cluster sample, systematic sample.
Would you agree to the statement on random sampling methods. Please explain why. In probability samples...
Would you agree to the statement on random sampling methods. Please explain why. In probability samples “each population element has a known (non-zero) chance of being chosen for the sample.” (StatTrek 2020). Some examples of probability samples are, simple random sampling, stratified sampling, cluster sampling, multistage sampling, and systematic random sampling. Simple random sampling is the population and sample consists of “N” objects, and an example is when people play the lottery. Stratified sampling is based on some type of...
In 1996, the General Social Survey (which uses a method similar to simple random sampling) asked,...
In 1996, the General Social Survey (which uses a method similar to simple random sampling) asked, "On the whole, do you think it should be the government's responsibility to provide decent housing for those who can't afford it?" For this question, 240 people said that it definitely should out of 1572 randomly selected people. We will make a 90% confidence interval for: p, the true population proportion that would have answered yes to this question p-hat, the sample proportion that...
Suppose there is a McDonald's next to your school and you want to estimate the proportion,...
Suppose there is a McDonald's next to your school and you want to estimate the proportion, p of all people at your school who go to McDonald's on a typical school day. (a) If you had no preliminary estimate for p. how many people should you include in a random sample to be 85% sure that the estimate will be within a distance of 0.05 from p? Make sure to show the formula with the numbers plugged in. (b) Complete...
Suppose there is a McDonald's next to your school and you want to estimate the proportion,...
Suppose there is a McDonald's next to your school and you want to estimate the proportion, p of all people at your school who go to McDonald's on a typical school day. (a) If you had no preliminary estimate for p. how many people should you include in a random sample to be 85% sure that the estimate will be within a distance of 0.05 from p? Make sure to show the formula with the numbers plugged in. (b) Complete...
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Question 501 pts
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