Discuss the basic strategy for comparing the means of two populations based on independent simple random samples.

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: A statistical procedure in determining which hypothesis is more acceptable as true or which…

A: HERE USE basic  hypothesis testing

Q: Explain the Difference between the sample space and random variables?

A: Sample space: The sample space is the collection of all outcomes, if a random experiment is…

Q: Assume we do a simple random sample, where we have the same number of secondary units. Will cluster…

A: Since in the first case, the number of secondary units is the same, simple random sampling can be…

Q: Explain why it is sometimes preferable to employ a randomized block design instead of a completely…

A: In a randomized block design, the experimental units are first divided into homogeneous sub-groups…

Q: The best way to determine if a statistical hypothesis is true is to examine a random sample from the…

A: Statistical hypothesis - Statement regarding nature of population * it stated in terms of population…

Q: Explain the three methods of selecting a simple random sample

A: When the sample is selected randomly and every element of the population has an equal chance of…

Q: Explain the importance of mean and variance of random variable in decision making

A: Mean of a Random Variable: The mean or expectation of a random variable X, denoted by E(X), is a…

Q: How can the sample covariance be used to estimate the covariance of random variables?

A: The covariance is used to measure the relationship between two random variables, that is, to what…

Q: What is the difference between a fixed effect factor and a random effect factor?

A: The fixed effect factor is defined as when data has been gathered from all the levels of the factor…

Q: Suppose that you want to compare the means of several populations, using independent samples. If…

A:

Q: Are the univariate sample data normally distributed? Explain why for each.

A: Yes, unvariate sample data is normally distributed.  Static Facial Emotion Perception Accuracy is…

Q: What are the criteria for an experiment to be a binomial experiment?

A: Let us consider the below example: A fair coin is flipped 10 times; X represents the number of…

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

A:

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: When resampling data from two independent samples, what is the fundamental difference between…

A: Bootstrapping is basically a method of resampling a single dataset to generate a large number of…

Q: A stratified random sample can be used to ensure underrepresented populations are represented in a…

A: Stratified random sampling with proportional allocation: Stratified random sampling is a method of…

Q: What is the difference between testing hypothesis on a population and testing hypothesis when…

A: Statistical hypotheses testing:   Hypotheses testing is used to make inferences about the population…

Q: Explain one possible advantage of using a paired sample instead of independent samples.

A: Paired samples, are also known as dependent samples, can be defined as the samples in which natural…

Q: State two differences between a cluster sample and a stratified random sample

A: Stratified Sampling: Stratified sampling is a sampling method, in which the population is divided…

Q: an independent-samples t test, you will usuall

A: the test statistic for independent-samples t test = μ1-μ2-0combined standard deviation

Q: What is the sample size of adults participated in this study?

A: We have to find the sample size for the given situation.

Q: To conduct a hypothesis test comparing two population variances, both pop must be normally…

A: Assumptions for two sample variance test: Two populations should be normally distributed. Two…

Q: What are thw two requirements for a random sample?

A: In this case, we need to write the two requirements for the random sample.

Q: What is the purpose of the Z-Test for 2 Un-Paired Populations?  How would you apply this type of…

A: A z-test is a statistical test to determine whether two population means are different when the…

Q: The process of random sampling guarantees that the sample selected will be representative of the…

A: Given: provided a statement

Q: If the sample size is increased, the margin of error will decrease.   True or False

A: Given statement : " If the sample size is increased, the margin of error will decrease "

Q: What is the difference between a sample and a census? Why can it be advantageous to select a sample…

A: A census is a study of every unit, everyone or everything, in a population. It is known as a…

Q: Why do you need to know the sampling distribution of the difference between two sample means in…

A: In this case, we need to find the reason for identifying the sampling distribution of the difference…

Q: Why a casual or haphazard sample doesn’t qualify as a random sample?

A: Haphazard or casual sampling is where we try to create a random sample by haphazardly or casually…

Q: Why can we consider the sample mean in random samples of size n from a given population to be a…

A: We consider the sample mean in random samples of size n from a given population to be a random…

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: • When might a small sample size be appropriate in a study? •When is a very large sample size…

A: When the sample size is ideal then a sample size can be appropriate in a study. The ideal sample…

Q: An unbiased sample is a good representation of the population. True or False

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

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

A: There are two sample groups.

Q: If a researcher uses random sampling, the sample will definitely be representative of the…

A: Solution: The given statement is “If a researcher uses random sampling, the sample will definitely…

Q: You can reduce the risk of a Type I error by using a larger sample. True or False?

A: Type-I error: Type I error is rejecting the null hypothesis when the null hypothesis is actually…

Q: The reason why samples are selected at random is

A: We know that  Random sampling :  Selecting a sample randomly from the population . By selecting…

Q: Discuss the basic strategy for comparing the means of two populations based on a simple random…

A: Explain the basic strategy for comparing the means of the two populations based on a simple random…

Q: If samples of a fixed size N are drawn randomly and with replacement from the same population of…

A: If samples of a fixed size N are drawn randomly and with replacement from the same population of…

Q: Too many outliers on our sample data is acceptable as long as data are summarized and presented by…

A:

Q: If the null hypothesis is true, then what does the distribution of sample means?

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

Q: Suppose that you want to compare the means of several treatments in a randomized block ANOVA. If…

A: Solution: Friedman test: As known to apply the Friedman test first we rank the observations within…

Q: Discuss the basic strategy for performing a hypothesis test to compare the means of two populations,…

A: In two sample t test, there are two independent large samples taken from two different populations.

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: Even if a treatment has no effect, it is still possible to obtain an extreme sample mean that is…

A: According to the provided information, if a treatment has no effect, the extreme sample mean that is…

Q: One advantage of a within subjects ANOVA is that the participants serve as their own comparisons…

A: Here we want to know given statement is correct or not.