What value should we expect for our sample proportion?

Q: ow can I change it to a representative sample

A: In convenience sampling, the individual samples are easily determined and do not depend on…

Q: what is atypical sample

A: Atypical sample means something Unusual

Q: What is the difference between sample means and a distribution of sample proportions?

A: Given : Sample mean : Average of sample observations is known as "sample mean". Sample proportion :…

Q: How do I calculate a 95% confidence level for a sample proportion in excel? Meaning, what formula…

A: Given : Confidence level = CL = 95% = 0.95

Q: Does the sample size ? affect the mean of all possible sample means? Explain your answer.

A: According to central limit theorem, for large sample (>30) or if the population follows normal…

Q: Find and provide the solution of sample mean, sample median, sample mode, and sample variance of the…

A:

Q: Why is a sample proportion generally used to estimate a population proportion instead of obtaining…

A: Population proportion: The proportion that is calculated from the population which has a specific…

Q: Why do you think any serious researcher would use the sample mean to estimate for the population…

A: Generally research is carried out to determine a particularoutcome in the targeted…

Q: How much difference is there between the mean for the treated sample and the mean for the original…

A: Definition Sample Mean x It is the mean of all the values of a sample.   Population μ It is the mean…

Q: What do you think is the reason, why researchers prefer to get a sample from the total population…

A: A researcher can carefully design the study which to a large extent try to prevent the biases and…

Q: what is sample and population ?

A: Population : Population refers to all possible individuals or subjects in a study Or we can say that…

Q: Explain why you should get a much better prediction for μ by using x from a sample size n rather…

A: The confidence interval on mean is given as x-Zα2sdn≤μ≤x-Zα2sdn where  μ=population meanx=sample…

Q: How does the sample size affect the value of the mean and the standard deviation? Please elaborate.

A: Mean : The mean is the data's Centre point or typical value and summarizes a complete dataset with a…

Q: What type of sample do we usually prefer?

A: We have given that  What type of sample do we usually prefer

Q: Discuss what is the relationship between sample size and sampling error?

A:

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

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: What are the steps for finding the relative frequency of sample means above or below a specified…

A: The sampling distribution of sample means is approximately a normal distribution because of the…

Q: Explain about the Sampling Distribution of mean 1 less mean 2.

A:

Q: Understand the basic principles of sampling, including the differences between statistical and…

A: The sampling theory is based on three principles- (a) Principle of validity- According to this, the…

Q: Describe the sampling distribution of the difference between two sample means large samples.

A: Our aim is to describe the sampling distribution of the difference between two sample means.

Q: If the sample size is n=16 what is likely true about the shape of the population?

A: Solution:  Central limit theorem: The central limit theorem state that as the sample size increases…

Q: If we would like to decrease the margin of error without changing the sample size, what must happen?

A: We have to find what to do to decrease margin of error.

Q: Explain how judgement is used in statistical and non-statistical sampling.

A: The statistical sampling is based on the theory of probability. In statistical sampling each element…

Q: What is formula for sample mean?

A: The sample mean is also known as the average of the sample. The sample mean is a measure of central…

Q: What is the difference between a cluster sample and a stratified sampling

A: There are broadly two types of sampling procedures or methods: one is probability and the other is…

Q: Why is statistical inference generally used to obtain information about a population proportion?

A: Generally, the size of the population that is considered under study is large. It would be difficult…

Q: Explain how a sampling distribution of a sample can be constructed.

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Q: what sample size should be used?

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.05 Since , the estimate of the population…

Q: How to decide one or Two Samples?

A: t-test:  (i) In the t-test, the sample size of 30 is large enough (n < 30) (ii) Samples are taken…

Q: Develop a basic understanding of the properties of a sampling distribution based on the properties…

A: The properties of sampling distribution are:

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: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

A: Let us take an example of sales of umbrella and sales of raincoats. Sale of raincoats Sale of…

Q: Explain how to perform a two-sample z-test for the difference between two population proportions.

A:

Q: How do you find the stardard deivation for a sample proportion?

A: The sample proportion is p, suppose.  Find q which is equal to 1-p Finf the sample size = n

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: What is the Importance of Equal Sample Sizes?

A: The t-test and ANOVA assume that the sample sizes are equal. There is an importance that the two…

Q: Obtain the standard error of difference of sample proportions.

A: ANSWER: For the given data,

Q: How does an observed sample mean qualify as a common outcome?

A:

Q: What is an example of a stratified sample? How can you tell when appropriate to use a stratified…

A: When the population is divided into small samples of interest then these are called strata and the…

Q: What are the advantages of sampling over a census?

A: Population: In statistical enquiry our interest lies about gathering information about some…

Q: What is the symbol for the best point estimate for the true proportion? What is the symbol for the…

A: A point estimate is defined as the single value that is calculated from the sample data to estimate…

Q: Explain why increasing the sample size tends to result in a smaller sampling error when a sample…

A: Sampling error:When a sample is used to estimate a population characteristic, the error resulting is…

Q: What are the applications of Biostatistics, Give at least two examples of your own relevant to…

A: Statistics can be in any form such as numbers, summaries of patterns and probabilities.…

Q: What does the SEM value tell us about the magnitude of sampling error?

A: Introduction: Suppose a random sample of size n is taken from a population with mean μ and standard…

Q: The process of using sample statistics to make conclusions about population parameters is called…

A: In statistics, the population consists of the entire set of entities that are under study, whereas a…