What are thw two requirements for a random sample?

Q: Describe the procedures for obtaining a random sample. step by step

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Q: What is the statistics processes stages and how do we select a simple random?

A: Simple Random Sampling : It is the technique of drawing a sample in such away that each unit of the…

Q: Leonardo da Vinci is interested in studying the wing length of carrier pigeons in Milan. To do so,…

A: In this case, we have to find the what method did LDV used.

Q: A rowing team consists of four rowers who weigh 152, 156, 160, and 164 pounds. Find all possible…

A: Weigh of four rowers in a rowing team is population . So the given population is :…

Q: Sample size is larger if

A: Sample size is large if we can make statement for population from it.

Q: Many economic and business measures such as sales, investment, consumption, costs, and revenues can…

A: Discrete Random Variable: A random variable is a variable which is countable in an infinite amount…

Q: A sociologist wants to know the proportion of adults with children under the age of 18 that eat…

A:

Q: A rowing team consists of five rowers who weigh 152, 159, 162, 150 and 156 pounds. Find all possible…

A: The formula for combination is nCr = n! / [r! (n – r)!] = [n (n – 1) … (n – r + 1)]/r!. Explanation:…

Q: 5. How is the sampling distribution of the statistic x displayed?

A: We have to show how the sampling distribution of chi square displayed.

Q: The state highway department is studying traffic patterns on one of the busiest highways in the…

A: One sample t-test: One sample t-test is used to test the significance difference between population…

Q: What is Random Sampling? Give example of it.

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Q: State two differences between a cluster sample and a stratified random sample in this situation.

A: Sampling:      The Sample is a subset of the Population, where a sample is extracted from a…

Q: When you are conducting the t test, the sample size must be greater than .30

A: We have to find the statement is true or false....

Q: What is it meant by the term “parameter of a population”? Explain why a population can be…

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Q: identify two methods for obtaining a simple random sample

A: The two methods for obtaining a simple random sample are:Lottery method: In this method of random…

Q: The sampling variability of the sample means becomes smaller as the sample size n gets larger. True…

A: Here we need to determine whether the given statement is true or false.

Q: what is the z score formula and and reverse z score formula ?

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Q: How large of a sample size is required?

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Q: List two ways to identify a simple random sample.

A: Definition: Simple random sampling is defined as a sampling technique where every item in the…

Q: A teacher at a school obtains a sample of students by selecting a random sample of 20 students from…

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Q: Wisconsin State government is attempting to improve the productivity of its workforce by trying to…

A: The null and alternate hypothesis are H0 : μd=0HA : μd=0 where μd is the difference in the mean in…

Q: Assume that the population consists of only these eleven data points for y and z. Construct one…

A: It was stated to assume that the population consists of only these eleven data points for y and…

Q: Why is randomization the best method for dealing with extraneous variables?

A: Here we have to explain why randomization is the best method for dealing with extraneous variables

Q: Give me an example of systematic sampling and simple random sample

A: Given : Systematic sampling   Simple random sample

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: when we are performing a hypothesis testing for a population mean, if the sample size is small, what…

A: For hypothesis testing of the population mean of the small samples (<30) t-statistic is used.…

Q: use a sample to draw an inference about a population

A: The population is a set of all the possible observations about a specified characteristic of…

Q: An experiment consists of tossing a die and flipping two coins.Let X be a random variable whose…

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Q: What is the acronym used for simple random sampling without replacement?

A: In this case, we need to find acronym used for simple random sampling without replacement.

Q: What is the selection of a subset of a population where each element has an equal chance of being…

A: here use basic of sampling method

Q: What sampling method is used when a statistic student did a research on the time spend by grade11…

A: Simple random sampling: A procedure for selecting a sample of size n out of a finite population of…

Q: Give a clear chart showing the conditions, where we can apply various types of random and non-…

A: Random sampling is also known as probability sampling, is a sampling method in which the method of…

Q: What is the statistics processes stages and how do we select a simple random ?

A: In statistical analysis, the sampling is defined as selection of subjects from the population so as…

Q: The state highway department is studying traffic patterns on one of the busiest highways in the…

A: Provided information is ;  sample size(n) = 64 sample mean(x¯)=  14,205 sample standard…

Q: How do I find a pooled variance of 2 sample groups?

A: There are two sample groups.

Q: How do you describe a discrete random variable?

A: A RANDOM VARIABLE IS A NUMBER GENERATED BY RANDOM EXPERIMENT RANDOM VARIABLES ARE OF TWO TYPES:…

Q: A rowing team consists of five rowers who weigh 152, 159, 162, 150 and 156 pounds. Find all possible…

A: Given: Weights of five rowers- 152,159,162,150,156 Sample size, n=3

Q: drawal symptoms may occur when a person using a painkiller suddenly stops using it. For a special…

A: Solution: Given information n=1600 sample size p=0.02 Population proportion. q=1-p =0.98

Q: What is difference between random sampling and random assignment?

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Q: What is a paired sample t-test used for?

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Q: What concept does the mean of a discrete random variable generalize?

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Q: What is Sampling Distribution of t?

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Q: Calculate the variance of a sample for which n=5, sigmax^2=1320, sigmax=80

A: Given data n=5∑x2=1320∑x=80

Q: Españo An adventure company runs two obstacle courses, Fundash and Coolsprint, with similar designs.…

A:

Q: A manager chooses 2 months of the year during which to have training. What is the size of the sample…

A: A manager chooses 2 months of the year during which to have training. and we know, 12 month in a 1…

Q: How do I find the p-value from a randomized distribution?

A: Introduction - p-value - The p-value is the probability of obtaining results at least as extreme as…

Q: How do you transform the sample statistic (M, – Mo) into a test statistic (tobs)?

A: The answer is given in the below image.

Q: (4) Are the population mean and variance random variables? Why? Are the sample mean and variance…

A: Note: Hi! Thank you for the question. As questions 4 and 5 are independent questions, according to…

Q: he state highway department is studying traffic patterns on one of the busiest highways in the…

A: Step 1: State the hypotheses The null and alternative hypotheses are ​​​​​​​   Step 2: Find…

Q: 5.What is the benefit of random selecting single sample from a population

A: Asked about  benefits of random sampling :  Random sampling : Selecting a sample from population in…

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.