You are interested in knowing the proportion of Stormtroopers who are true clones. How many Stormtroopers must be surveyed in order to be 90% confident that the sample proportion is in error by no more than 2% percentage points?

Q: A candy manufacturer sells bags of chocolate treats that are supposed to be half dark chocolate and…

A: A one sample  z-test must be performed to test the claim that the proportion of dark chocolates is…

Q: Q12. If 150 households were surveyed out of which 120 households have internet fiber cable, then…

A: Given Data: x=150-120=30 n=150

Q: In a poll of 1000 randomly selected voters in a local election 170 voters were against school bond…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: You are the operations for American Airlines and you are considering a higher fare level for…

A: Note:Since, in this question nothing is given about the percentage of passengers who prefer aisle…

Q: A grocery store manager wants to know if displaying cranberries near the entrance to the store…

A: P1 : Proportion of shoppers who buy Cranberries when they are near the store entrance. P2 :…

Q: A researcher has an experiment that needs 20 scores to get enough power to be significant. a. If…

A: For a one-sample t-test, only one set of sample score is taken which is used to obtain a sample…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: recent study reported that 12% of people toss away about half of what they buy at the grocery store.…

A: From the given information we conduct Z test for proportion.

Q: se Brianna's sample to estimate the number of red gumballs in the jar.

A: Given that  Class jar containing 200 gumballs of two different colors  (Red and green) Brianna draws…

Q: Suppose a company wants to determine the percentage of customers who shop online. How many customers…

A: Given dataError = 3% = 0.03Confidence level = 0.92

Q: If a researcher were to increase a sample size from n = 30 participants to n = 80 participants, what…

A: Increase power

Q: a. Explain what it would mean to make a type I error. Choose the correct answer below. A. A type I…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: From the given information, let X be the number of students received the financial aid. The dean…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: a. The population proportion is not known consider it as 0.5, the margin of error is 0.035, and…

Q: We want to use hypothesis testing to determine whether the fraction of male passengers, who survived…

A: From given data: n=80 p0=0.2 α=0.01   Critical value for two tailed z-test= 2.576

Q: . A researcher has an experiment that needs 20 scores to get enough power to be significant. a. If…

A: Given:  A researcher has an experiment that needs 20 scores to get enough power to be significant.

Q: mpany that manufactures only apple juice surveyed customers at a local grocery store. Five mothers…

A: A sample is a portion of the population that is selected randomly to represent the population. It…

Q: A psychologist is concerned about the health of veterans returning from war. She examines 37…

A: In the above example All veterans returning from war is the population for the study that hey show…

Q: You are now the administrator of a local hospital, and your first project is to research the quality…

A: Given information: The data represents the values of number of unsatisfactory foods among the…

Q: 7. ( ) Suppose that, in a suburb of 12,235 people, 6,418 people moved there within the last five…

A: Formula : * Population proportion  p = X/N *sample proportion p̂= x/n

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: How do you differentiate cluster sampling with stratified sampling? a. In stratified sampling there…

A: In stratified sampling technique, the sample is created out of the random selection of elements from…

Q: A researcher wants to see if people in California were less likely to eat turkey on Thanksgiving…

A: From the provided information,

Q: In what range would you expect to find the middle 98% of most head breadths? Between and If you were…

A: Let x1 and x2 be the head breadths. The middle 98% of most head breadths lies between is,…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: The margin of error (E) is 0.045 and the confidence level is 0.95.

Q: The secretary in a statistics department would like to estimate how much coffee to brew per day such…

A: From the following data we have to calculate mean, standard, and confidence interval

Q: A population is normally distributed with µ = 90 and σ = 8. For this population, which is the 29th…

A: Solution-: Given: μ=90,σ=8 We want to find 29th percentile?

Q: When you are using surveys in research, it is easy to ensure that the population filling out the…

A: Survey Research is defined as the method of conducting research using surveys sent to survey…

Q: Cody wants to compare how students in two grades use the school library. For one week, he records…

A:

Q: If you selected a sample of n = 35 from a population whose μ = 56 and σ= 12, what would you expect…

A: Given information: The sample size is, n= 35. The mean of the population is, μ=56. The standard…

Q: Suppose 420 randomly selected people are surveyed to determine whether or not they subscribe to…

A: Given that, 420 randomly selected people are surveyed to determine whether or not they subscribe to…

Q: (6) A student surveys some students on campus in the evening and finds that 16 out of 20 of the…

A: A bias in the survey may be defined as the intentional or unintentional tendency to over or…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: The confidence level is 95% Therefore, α = 0.05 and α/2=0.025. The margin of error is 0.035 Since…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: Thirty two percent of all americans drink bottled water more than once a week (national resources…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: A doctor is concerned that a drug treatment causes people to run a fever. She recruited n=50…

A:

Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

A: Given data: Suppose we have the results of a Gallup survey (simple random sampling) which asks…

Q: hat percentage of hospitals provide at least some charity care? Based on a random sample of hospital…

A: Given :  A random sample of hospital reports from eastern states is given percentages.  56.7…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: As part of a sixth-grade class project the teacher brings to class a jar containing 200 gumballs of…

A: Given Sample size = 25 Population size = 200 8 gumballs are red in the sample

Q: 4. A researcher is interested in the percentage of HIV positive teenagers in South Africa. The…

A: We have given that statement. Here, need to find out that the given statement is true or false.…

Q: Sharon is interested in testing the differences between student populations at two different…

A: From the given information, it can be observed that the data is collected from two different…

Q: Suppose a company wants to determine the percentage of customers who shop online. How many customers…

A:

Q: A radio talk show host with a large listening audience is interested in the proportion p of adults…

A: Given, A radio talk show host with a large listening audience is interested in the proportion p of…

Q: Statistical tests are more accurate if there is a sample size of n > 30. how will a sample size  of…

A: It is given that the sample size is n=20.

Q: Mary is running for mayor. She wants to know if she has a chance to win, so she collects a random…

A:

Q: oms. The researcher picks 2 of the 4 classrooms and asks every 1st grader in the 2 classrooms what…

A: A researcher studying allergies to animals is interested in performing a study at the local…