Which of these methods can be used in a survey? Select all that apply. An online poll is distributed, and 40 people respond. O A phone interview is issued to 100 local voters. O A sales representative hands out paper questionnaires to every new client. An editor reviews articles submitted by candidates and selects the best one. O A psychologist observes the performance of students enrolled in college over a period of 2 years.

Q: A competency test is modified so that the proportion of test-takers that pass is more than 75%. A…

A: Sample proportion is given by

Q: In a study of whether smoking causes lung cancer, researchers examined 2000 people.  About half of…

A: Four percent of the smokers developed heart disease by the end of the study period, whereas only one…

Q: A random sample of 800 residents is taken. Of those 800 residents, 170 said their favorite college…

A:

Q: A basketball player with a 65% shooting percentage has just made 6 shots in a row. The announcer…

A: The basketball player has a shooting percentage 65% . So, the probability that the player will make…

Q: Online Data Claim: Most adults would erase all of their personal information online if they could. A…

A: Given that,

Q: A startup company wants to market a new soft drink. It decides to gamble by running commercials…

A: we have given that  level of significance (alph)=0.05  and population proportion =35%=0.35  ,sample…

Q: A researcher wanted to see if giving a selective serotonin reuptake inhibitor (anti depressant)…

A: a. The mean of the sample is, x¯=∑ixin=27+25+32+40+43+37+35+388=2778=34.625 Thus, the mean of the…

Q: raquat is one of the most widely used herbicides and is highly toxic to animals. In a study to…

A: The table of observed values is shown below   Yes   No   Total   I 25  42  67  II 27  39  66…

Q: The table shows the results of a random survey of students In grade 9 and grade 10. Every student…

A:

Q: Suppose Marcella wants to compare music listening time among college students on weekdays versus…

A: The t-test is one of the most use full statistical tests in statistical inference. Most of the small…

Q: Student researchers at Hope College conducted an experiment to determine whether students memorize…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: The table shows the results of a random survey of students in grade 9 and grade 10. Every student…

A: Consider the table All the events are mutually exclusive Hence Total number of Grade 9 students =…

Q: A researcher is proposing that exercise makes a person more energized as a result they require less…

A: Excel Procedure: Enter Average hours of sleep and Hours of exercise in Excel>Data>Data…

Q: WHich of these is an example of a population

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

Q: A manager at a large company wants to understand whether the employees are feeling overworked while…

A: Total company employees = 200.

Q: Kylie works for a large nursery and is investigating whether to use a new brand of seeds. The new…

A: Null and alternative hypothesisNull Hypothesis:A null hypothesis is a statement regarding the…

Q: An educator wishes to determine whether there is a difference in the favorite subjects selected by…

A: It is needed to test, whether subject selection is independent of the gender of the individual.

Q: A medical researcher says that less than 79​% of adults in a certain country think that healthy…

A: Here, it is asked to identify the claim and state the H0 and Ha. Here, the medical researcher said…

Q: In 2019 the polling company Ipsos asked Canadians how much additional tax they would be willing to…

A: The data has been collected in the response of “How much are you will pay?” Since, a sample…

Q: The number of students taking the Scholastic Aptitude Test (SAT) has risen to an all-time high of…

A: Solution: Let X be the number of times SAT was taken. From the given information,

Q: The screening facility can process 1,000 people each week. Assume you are attempting early detection…

A: We have to answer questions based on conditional probability.

Q: 7. In an effort to reduce the amount of smoking, the administration of a hospital is considering the…

A: a) From the table 191 among 1000 students were against smoking clinic.so the required…

Q: One of the most​ impressive, innovative advances in online fundraising over the past decade is the…

A: π1 is the population proportion of successful technology​crowd-funding projects and π2 is the…

Q: What is the probability that a student takes the SAT more than one time? Q-2  Refer to the data…

A: From given table, Total = 721769+601325+166736+22299+6730 = 1,518,859

Q: The International Business Society conducts a series of managerial surveys to detect challenges that…

A: Given, Number of small firms n1=423 Number of large firms n2=192 Sample proportion of small firms is…

Q: archer for Based on advancements in drug therapy, ceutical company is developing Resitnan, a new…

A:

Q: Last year at a local country club, 60% of the golfers were “full members”, 30% were “junior…

A: Given: Observed values of a sample is as follows Full members 210 Junior members 100 Guests…

Q: researcher published this survey result: "74% of people would be willing to spend 10 percent more…

A: * ANSWER ::-  (1)

Q: Paraquat is one of the most widely used herbicides and is highly toxic to animals. In a study to…

A: The Chi-square test for independence should be used to test whether agent A affects the survival…

Q: The table shows the results of a random survey of students in grade 9 and grade 10. Every student…

A: we have to find correct statement.

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the…

A: null and alternative hypothesis are contradict to each other, we claim the null hypothesis to…

Q: 7. Two students in a behavioral sciences class compared their scores on a series of five quizzes.…

A: Here data are given, We have to find which student A or B tend to perform better on quizzes…

Q: Snow removal is a concern in parts of the United States that receive large amounts of snowfall every…

A:

Q: A business magazine mailed a questionnaire to the treasurers of all of the Top 400 most profitable…

A: A ‘population’ is defined as a set or collection of all the individual persons, objects, events, and…

Q: A forensic psychologist conducted a study to examine whether being hypnotized during recall affects…

A: Use the given data to form the excel table:   Hypnotised group(x) x-x¯ x-x¯2   7…

Q: You are taking a multiple choice test for which you have mastered 70% of the material. Assume this…

A: Given, P(Knowing the answer) = 0.7 => P(Not knowing the answer) = 0.3

Q: Determine whether the study is an experiment or an observational​ study, and then identify a major…

A: In an observational study, researcher observes the individuals and measure the outcomes. In this…

Q: A total of 205 people were asked to pick their favorite product from a list of three options.…

A: Given : Claim : Three products have different chances of being chosen.

Q: A researcher asks random samples of residents of two separate counties as to whether they had…

A: Let p1 be the proportion of residents of one county who purchase organically grown food.   Let p2 be…

Q: A researcher conducts an experiment comparing two treatment conditions and obtains data with 13…

A: a.   In this case, there are 13 scores for each treatment condition, i.e., group, 13 subjects will…

Q: Chick-fil-A gets it right. Which fast-food chain fills orders most accurately at the drive-thru…

A:

Q: 5. In a study of shopping preferences, a sample of young adults and a sample of people over age 50…

A: The correct answer is the study is an experiment with two treatments, shopping at chain super…

Q: How do high school students feel about trust and honesty in the workplace? A random sample of 9542…

A: a)   In this case, it is needed to check whether there is a difference in the distribution of how…

Q: Twenty different statistics students are randomly selected. For each of them, their body temperature…

A: 1. Correlation between two variables measure the strength and direction between two variables. It…

Q: The Denver Police Department wants to improve its image with teenagers. A uniformed officer is sent…

A: Given : The Denver Police Department wants to improve its image with teenagers. A uniformed officer…

Q: Determine whether the study is an experiment or an observational​ study, and then identify a major…

A: In an observational study, researcher observes the individuals and measure the outcomes. In this…

Q: Student researchers at Hope College conducted an experiment to determine whether students memorize…

A: For Paper : sample size, n1 = 20 Sum, Σx1 = 138.5 Mean, x̄1 = Σx1 /n1 = 6.925 Calculating Standard…

Q: An education researcher claims that at most 5​% of working college students are employed as teachers…

A: a) Denote p as the true proportion of working college students, who are employed as teachers or…

Q: Q7. A survey was conducted in which 100 males and, independently, 100 females were asked about their…

A: Given: Drive Public Transportation Walk or Bicycle total Females 71 22 7 100 Males 76 18 6…

Q: A demographer wants to know what proportion of women in different countries dye their hair. They…

A: a. Denote pChina and pKorea as the true proportions of women from China and Korea, respectively, who…

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.