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

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

A:

Q: Describe an experiment in which a binomial distribution could be used, and explain why the binomial…

A: We have to give an example of binomial distribution and give reason why it is following binomial…

Q: Explain the difference between the one-way fixed effects model and the one-way random effects model.

A:

Q: Why does a large value of the F statistics provide evidence against the null hypothesis?

A: We use F-statistic (F ratio) when we are comparing the group means like ANOVA test for for more than…

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: 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: Which method describes an experiment?

A: HERE scenarios are given for check whether additive improve milage of car

Q: Explain why we have N1 + N2 - 2 degrees of freedom when we pool the variances. (In other words, why…

A: Degrees of freedom are nothing but the free choices available to the researcher to be made or degree…

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: 1. Describe the sources of variability in a random experiment

A: If in each trial of an experiment conducted under identical conditions, the outcome is not unique,…

Q: In a two-way ANOVA, the main effect of a factor is the...

A: We have given the following statement about two - way ANOVA

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 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: Which is the most striking feature of a two-factor ANOVA?

A:

Q: How do you illustrate a normal random variable?

A: How do you illustrate a normal random variable?

Q: What is the formula to be used to determine the total possible random samples?

A: Let the population size be N Sample size be n

Q: What is Classic Variable Sampling?

A: In this case we need to define about the classic variable sampling.

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: 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: Discuss the basic strategy for comparing the means of two populations based on independent simple…

A: Simple random sample:It is a subset of the population, in which each element in the population…

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: how can statistical procedures can help determine whether the data is attributable to chance…

A: Statistical approaches can be quite useful in identifying whether or not data is due to chance. To…

Q: What is the expected value and variance of flight time?

A: Given that x~u (120 ,140 ) Find Expected value =? Variance =?

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

A: Given: provided a statement

Q: What are Randomized Policies?

A: Randomized Policies

Q: Explain how methods developed for analyzing randomized experiments can be applied to…

A: The methods developed for analyzing the randomized experiments can be applied to quasi-experiments…

Q: Describe the difference between a completely randomized design, a randomized block design, and a…

A: Here, we have to give difference between CRD, RBD and factorial experiment with examples.

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: When does random sampling occur?

A: It is a sampling technique to choose the desired number of samples from the population. The types of…

Q: is take for one-way between-subjects analysis of variance? Why can’t it be summarized in a single…

A: The amount of variation among the sample means or the variation attributable to the difference among…

Q: How many degrees of freedom will the error have in a randomized block design with five treatments…

A: Randomized block design (RBD): Number of treatments = a = 5 number of blocks = b = 3

Q: What is the number of successes in a binomial experiment called?

A: Data often arise in the form of counts or proportions which are realizations of a discrete random…

Q: What do we call variance in the ANOVA equation, and what notation do we use to represent them?

A: Given information: The information about ANOVA is given.

Q: Explain how the average causal effect for a given population can be estimated by using an ideal…

A: Causal effect may be different for different individuals and it is not possible to measure the…

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: Explain the reasons to study randomized controlled experiments?

A:

Q: What does it mean to say that there is a 1% chance of a Type I error?

A: We know that ; Type -1 error is occurs when we rejects the true null hypothesis. It is also known as…

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

A:

Q: How do you calculate dfAxB for a two-factor ANOVA?

A: Consider a two-factor ANOVA model with factor A and factor B.

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

A:

Q: What does a rare outcome signifies?

A: A rare outcome signifies that, with respect to the null hypothesis, A rare test or means less…

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 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: how do I find the variance?

A: Population variance is the measure of variability of the data that is how far away our data points…

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…