On Saturdays, cars arrive at David Zebda's Scrub and Shine Car Wash at the rate of 80 cars per hour during the ten-hour shift. David wants a sample of 40 Saturday customers to answer the long version of his quality service questionnaire. He instructs the Saturday crew to select the first 40 customers. His sample is a __________. simple random sample systematic sample convenience sample cluster sample stratified sample

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

A: Stratified sample :- Stratified sampling is a method of sampling from a population which can be…

Q: a stratified random sample? WO ber the students from 1 to 2000 and us ey the first 100 students to…

A: Stratified sampling is a process of random sampling. It is used to divide a population into…

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

A: Solution: Option 2 is correct. (Systematic)

Q: Freshmen Seniors Sample size 80 70 Sample mean $460 $440 Population std. dev. $52 $63

A:

Q: 5. [Facebook An Internet survey asked 525 Facebook users whether the amount of time they spent using…

A: From the provided information,

Q: More sampling methods Consider each of these situ-ations. Do you think the proposed sampling method…

A:

Q: A market researcher wants a large sample size for her survey, so she decides to stand in the food co…

A: A voluntary sample = In this type of sample the researcher requests members of a population to join…

Q: For a large lecture class, a professor decides to make his class notes available on the Internet.…

A: In statistics, population is a aggregate of animate, inanimate, or objects under study. Population…

Q: Kristen Ashford purchased the subscribers list for Wind Surfing magazine. She plans to survey a…

A: For this case, the sample is selected randomly by using the random number table from the list of all…

Q: Simple Random Sample Which of the following is/are simple random samples? a. As Lipitor pills are…

A: Simple random sampling: It is a probabilistic method of sampling, in which, each population unit is…

Q: A sample in which all units in the population have an equal chance of being selecteD) العينة التي…

A:

Q: In a completely randomized experimental design, eleven experimental units were used for each of the…

A:

Q: The unemployment rate for 18- to 34-year-olds was reported to be 10.8% (The Cincinnati Enquirer,…

A: Let P denote the hypothesized proportion, p denote the sample proportion and n denote the sample…

Q: C What sampling procedure would you recommend to complete your study? C10. Imagine that you are…

A: Given, for each respondent a value is given from 0 to 21473 Appendix A, starting at column 7 and…

Q: During one semester, Professor Hassett wanted to sample the attitudes of the students taking college…

A: Population size is N=728 Sample size is n=15 Sampling method : simple random sampling

Q: Amtrack is considering changing the train schedule for trains that stop at the Utica trainstation.…

A: Sampling methods: In simple random sampling, all the units in the population have equal chance of…

Q: A management officer of Alley Condominium wants to estimate the number of children its residents…

A: Given: The data given is as follows Tower A B C Total residents 100 80 110 Sample size 20 15…

Q: What is the selection of a simple random sample from each of a given number of subpopulation, or…

A: Stratified random sampling: In stratified random sampling the entire population is divided into…

Q: You constructa sample in which Whites, Blacks, and Latinos are randomly selected from the U.S. adult…

A: Given Information: To find out the correct answer.

Q: SAT and ACT Tests Because they enable efficient procedures for evaluating answers, multiple-choice…

A: Consider the choices for each question as {a, b, c, d, e}. Here, two questions are randomly guessed.…

Q: When gathering a sample for your study, you selected subjects in the general population and…

A: Here in this problem we want collect data from a general population. In the survey we ask a person…

Q: One popular activity that tourists participate in when they visit Alaska is panning for gold. A gift…

A: Given that,possible chances (x)=8sample size(n)=50success rate ( p )= x/n = 0.16success…

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

A: Population is the set of all objects of interest. Sample is s subset of the population. It is not…

Q: Wildlife biologists inspect 153 deer taken by hunters and find that 32 of them carry ticks that test…

A: The formula for standard error is calculated as follows: Standarderror=p^1-p^n

Q: Getting a defective item when two items are randomly selected from a box of two defective and three…

A: Sample is the any fraction or small set of observation taken from the population. Population is the…

Q: For a large lecture class, a professor decides to make his class notes available on the Internet.…

A: In the given case the choice of commenting was in the hands of the students. The choice varied from…

Q: A football organization tests players to see whether they are using performance-enhancing drugs.…

A: In the given scenario, a single team is selected randomly from many such teams and all the members…

Q: Describe a Type I and Type II error for this situation.

A: The type I error is defined as the rejecting the null hypothesis when actually it is true. The type…

Q: A sample of 10 mice are selected at random from a set of 40 mice to test the effect of a certain…

A: 10 mice are chosen randomly out of 40.

Q: A researcher measures the number of push-ups that the members of a high school wrestling team can…

A: Given that a researcher measure the number of push-up that the members of a high school wrestling…

Q: Population is easily accessible   b. Population is not easily accessible   c. Popula

A: Snowball sampling is a nonprobability sampling method. In this type of sampling, participants of the…

Q: acres. From a simple random sample of 50 farms, the researcher obtains a sample mean farm size of…

A: Given that  Sample size n =50

Q: Which one of the sampling techniques is also called quasi-random sampling? a. Random sampling b.…

A: Quasi random sampling: In this sampling method, the items are first arranged in some order (either…

Q: The superintendent of a large school district wants to test the effectiveness of a new program…

A:

Q: Packed in at Rush Hour! Sq. Ft. per standing passenger In 1990 the New York Times reported the…

A: As per honor code we will be answering only three parts.  d)  Arrange the given data in ascending…

Q: battery manufacturer wants to determine how long atteries will last. They assign a number to each…

A: For this case, the sample of battery is selected randomly by using the random number generator the…

Q: elow are two scenarios.  One exhibits sampling bias, and one exhibits wording bias.  Identify the…

A: When a bias in the sampling that essentially influences the response due to ill-formed words may be…

Q: ter screens were randomly selected from a large collection of computer screens in a company’s…

A: A sample is a part of the population, which is selected from the population and if the sample is…

Q: wo machines are used for filling oil with a net volume of 16.0 ounces. The filling processes are…

A: Part 1: The hypothesis to be tested are, This is a two-tailed test. We reject the null hypothesis…

Q: A carload of steel rods has arrived at Cybermatic Construction Company. The car contains 1,000…

A: Thanks for giving opportunity to serve for bartleby students, Hey, There ! Thank you for posting…

Q: -)A maple sugar manufacturer wants to estimate the average trunk diameter of Sugar Maple rees in a…

A: Multistage sampling divides large populations into stages to make the sampling process more…

Q: A carload of various palletized aluminum castings has arrived at Mansfield Motor Manufacturers. The…

A: Simple Random Sample: A sample that is chosen randomly from a given set. Systematics Sample: A…

Q: What type of sample is this?

A: here given  study the effectiveness of a recent advertising campaign for a new menu item, a…

Q: To determine the proportion of students at a university university who favor the country's ruin of a…

A: Given data: To determine the proportion of students at a university university who favor the…

Q: A fashion designer surveys companies about upcoming seasonal trends for average hem length. He…

A: a). If the results are significant in the ANOVA, it means that not all treatment means are…

Q: Wood paneling can be ordered in thickness of 16'8 1 1 or inch. The random variable X is the total…

A: X = the total thickness of paneling in two orders.1/8+1/8 = 1/4 inch 1/8+1/4 = 3/8 inch 1/8+3/8 =…

Q: random sample of adults that walk into Kroger on Wednesday mornings are stopped and asked if they…

A: A random sample of adults that walk into Kroger on Wednesday mornings were surveyed.

Q: Conduct a test at the a = 0.01 level of significance by determining (a) the null and alternative…

A: Given: x1 = 118 n1= 258 x2 = 139 n2 = 314 level of significance = 0.01

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.