Jennifer is interested in conducting a study in the amount of money people spend at her local Starbucks in a week.  To gather her data, on her own trip to Starbucks to get a coffee Jennifer asks the people in line how much they spend.  What sampling technique was used? Cluster Convenience Stratified Systematic

Q: The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to…

A: Given: Total number of suspected criminals n= 1604 Number of peoples who are not captured = 1011…

Q: Felicia is conducting a survey to determine the determine the favorite TV show among her community.…

A: Stratified sampling: In stratified sampling the whole population is divided into two or more…

Q: Mrs. Trahan samples H assigned to a student. Select one: O a. simple O b. cluster O C. systematic n…

A: simple random sampling occurs when every sample in the population has equal chances of being…

Q: Which type of sampling method is used in the following? 20 people from each dorm are asked to fill…

A: In simple random sampling, the samples are chosen at random from the whole population. In cluster…

Q: uppose you take random samples from the following groups: freshmen, sophomores, juniors, and…

A: Stratified Random Sampling: The population is divided into subgroups then some members are chosen…

Q: In 2016 the Better Business Bureau settled 80% of complaints they received in the United States.…

A: The objective of this question is to calculate the expected value and standard deviation of the…

Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

A:

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A:

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: The table below shows the number of one company's stores located in each of 50 regions. Complete…

A: We can find the mean and the standard deviation of the given sample as shown below. Mean = Total sum…

Q: Horace Horsecollar is interested in the opinion of vacationers at Disney World.  He creates a short…

A: We know that in Systematic sampling method, we choose the first unit randomly and all the other…

Q: A political scientist is interested in the effect of government type on economic development. She…

A: Observational Stratified study should she use to ensure that countries are selected from each region…

Q: Researchers waited outside a restaurant. They stopped every 12th person who came out of the…

A: Systematic sampling method : In systematic sampling, the target population is ordered and the sample…

Q: A researcher divided subjects into two groups according to gender and then selected 200 members from…

A: Since we know that In stratified sampling we divided homogeneous groups from the heterogeneous…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.04 and the confidence level is 0.90.

Q: A student would like to estimate the average number of text messages sent by cell-phone users in a…

A:

Q: Homer Simpson is interested in studying the ratio of the various colors of sprinkles on Lard Lad…

A: Introduction: Here, it is not mentioned whether the three donuts of each variety are chosen randomly…

Q: Exhibit-C. An insurance company selected samples of clients under 18 years of age and over 18 and…

A: It is given that: "Under age of 18" group:n1 sample size=500x1 No. of accidents=180"Over age of 18"…

Q: Q2: Calculate the coefficient of variation percentage of the following samples reading:…

A:

Q: using dodge-romig plans for AOQL of 3%, determine the sample size if the process average defective…

A:

Q: A sample was taken by randomly selecting one student from the administration’s official list of…

A: Systematic sampling: When the population units occur in a sequence or pattern and a sample of size n…

Q: A customer service representative must spend different amounts of time with each customer to resolve…

A: The given distribution isGiven distribution is an exponential distribution with a parameter = 0.4

Q: Prof. Badalian wants to know the ages of moviegoers who go to see Star Wars. If he survey everyone,…

A: Systematic sampling can be defined as selecting the sample from  the large population according to…

Q: Why does this a situation call for a matched-pairs analysis?

A: Test is that whether there is difference between the measurements.

Q: Colin is a student in a consumer mathematics class creating a report on the annual interest rates of…

A: Using excel, the required z-score for each type of bank can be calculated as; 1. Enter the data into…

Q: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.03 and the confidence level is 0.95.

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

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: researcher decided to study the dietary habits of community college students. She did so in a way to…

A: Solution: The sampling methods can be classified into two types 1) Probability or random sampling…

Q: ks whether books are checked out by an adult or a child. She records this data for every fourth…

A: d) Given the librarian, check the books returned by the adults or a child are tracked. She records…

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

A:

Q: A city's telephone book lists 300,000 people. If the telephone book is the frame for a study, how…

A: Here population size, N=300000 Systematic sample is done on every 100th person i.e sampling interval…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…

A: Sample size n=549Favorable cases x=98

Q: Renee works as a quality control officer at a lumber yard. She selects every 200th two-by-four that…

A: In systematic sampling we divide the population in N equal sub population then we select every kth…

Q: The proportion of all passenger who experiencing flight delay is sample statistics and can be…

A: Solution

Q: Given 1,400 freshmen students with 600 male students and 800 female students, describe the way you…

A: Given: Total population, N = 1400           Gender wise total population, for males, N1 = 600 and…

Q: Jennifer is interested in conducting a study in the amount of money people spend at her local…

A: In simple random sampling, each of the unit is population has equal chance of being selected in the…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.