The staff of a school newspaper plans to investigatestudents’ opinions regarding the school’s security guards.They decide to survey 100 students at the school. Theeditor-in-chief recommends that they survey 25 randomlyselected students from each class (freshmen, sophomores,juniors, seniors). This is an example of aA) blocked random sample.B) multi-stage random sample.C) simple random sample.D) stratified random sample.E) random cluster sample.

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of female students is 20. Thus, the total number of students is 20+20 = 40.

Q: The city of Raleigh has 6800 registered voters. There are two candidates for city council in an…

A: Given : telephone poll of 500 randomly selected registered voters was conducted. 208 said they'd…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 The number of female students is 20. The total number of students…

Q: A recent graduate chooses 4 continents to visit from the 7 in the world. What is the size of the…

A: A recent graduate chooses 4 continents to visit from the 7 in the world total=7 choose =4

Q: A university is polling its students. It selects 200 students at random in the same proportions as…

A: Stratified random sampling is a process of sampling which uses different groups of the population…

Q: The librarian surveys every 7th student from an alphabetized list to determine reading preferences…

A: Here, we know that in the Systematic random sampling, we fix the order of the samples. In other…

Q: determine what type of sampling technique is used

A: Stratified sampling : This method is used when the parent population or sampling frame made up of…

Q: Beyonce wants to know: is the average weight of Americans greater than 110 pounds? What test should…

A: Step 1:Here we are talking about a single population i.e., population of the americans and we want…

Q: Identify which of these types of sampling is used: random, stratified, systematic, cluster,…

A: Answer:- Given statement is, "A sample consists of every 3rd student from Professor Cuellar’s…

Q: entering your work cafeteria and are approached by an individual to participate in their study by…

A: Given that  You are entering your work cafeteria and are approached by an individual to participate…

Q: The call center manager at InsuranceCorp is responsible for ensuring customer satisfaction. To this…

A:

Q: When a researcher who is studying "serious tennis players" asks 200 people if they qualify as this…

A: In the following problem Convenience Sampling is to be used

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: What sampling technique was used?

A: here use definition of sampling method

Q: You need to select a simple random sample of three from nine friends who will participate in a…

A: Random number table:Here, there are 9 friends and has been assigned a number from 1 to 9. A simple…

Q: A survey of students living in a high-rise residence is to be conducted. The residence has 10…

A: Here it is a two stage sampling because there is randomization in the two stages. First…

Q: plants in his garden into 10 regions.  He counts the number of sunflowers produced in just one of…

A: We have given that,  Farmer Josh separates his sunflower plants in his garden into 10 regions.  He…

Q: Part i) The proportion of the 126 people who are living below the poverty line, 25/126, is a: A.…

A: Here given , A government official is in charge of allocating social programs throughout the city of…

Q: A study was conducted to examine the percentage of senior citizens in town X who are still working…

A: A study was conducted to examine the percentage of senior citizens in town X who are still working…

Q: Identify what type of random or nonrandom sampling technique is used. Minority of senators are to…

A: Given that minority of senators are to be interviewed. So this implies that a group/type of senators…

Q: A researcher is collecting data on college students who go to school in Ohio. If she organizes the…

A: Solution  A convience sampling is the technique of drawing the sample when the researcher dram the…

Q: In a computer store chain, all PC tablets are sold with the option of a discount coupon for some…

A: To compare the proportion of two independent population the standard normal distribution is used.…

Q: Please find the range, sample standard deviation and inter-quartile range (IQR) following data set.…

A: For the given data we have to calculate it's range,standard deviation (s) and Inter Quartile Range…

Q: A veterinary epidemiologist wishes to investigate the use of antibiotics on cattle farms in a city.…

A: 4 types of sampling 1: simple random sampling  * Random selection from population to make sample.…

Q: In conducting a statistical study about the number of hours full-time students work at Miramar…

A:

Q: You are doing research on students and you are interested in looking at the differences among…

A: Given that, The collected 100 response from each class. i.e. 100 freshmen, 100 sophomores, 100…

Q: According the the U.S. Census bureau, the percentage of Santa Ana residents with a bachelor's degree…

A: From the provided information,

Q: Write a short note on the importance of random sample.

A:

Q: A statistics lecturer wanted to determine if the time spent studying affected a student's GPA She…

A: Correct Answer: b. Simple Random SamplingReason: The lecturer collected data from 300 randomly…

Q: An apparel company is coming out with a new line of fall clothes. In order to conduct a survey, it…

A: We can answer it as below from the definition.

Q: A governmental agency computed the proportion of violent crimes in the United States in a particular…

A: Null and alternative hypotheses: Null hypothesis: The null hypothesis is a statement which indicates…

Q: When the bureau of labor statistics conducts a survey, it begins by partitioning the US adult…

A: A simple random sample is a subset of population in which each unit in the sample has an equal…

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: Describe about the All Possible Random Samples.

A: The random samples can be selected in the following methods: Simple random sampling: If a sample of…

Q: A researcher wants to study the effects of social media on Grade 11 Mathematics High School. He…

A: Note: " Since you have asked multiple questions, we will solve the first question for you. If you…

Q: how do you find the simple random sample of 15 restaurants?

A: In simple random sampling each member of the population has an equal chance of being included in the…

Q: A government official is in charge of allocating social programs throughout the city of Vancouver.…

A: Solution-: Let, X- Number of an annual income that is below the poverty line. Given: n=129,X=24 We…

Q: Identify which sampling method is applied for each situation.

A: Given :

Q: A university has 30,000 undergraduate and 10,000 graduate students. A survey of student opinion…

A:

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: Empirical Rule:   The percentage of values lies between one standard deviation from the mean is…

Q: On election day, a local TV news organization stayed at three polling locations in Fairfield county…

A: Given:  The total number of votes for candidate A in the election for the US Senate seat are n=2790.…

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.