Can you think of an area where it might not be practical, for a variety of reasons, to sample 100% of the population being covered?

Q: In October 2017, the Gallup Poll asked a sample of 10281028 U.S. adults, "Are you in favor of the…

A: Margin of error: It is the vary of values below and higher than the sample data point in a…

Q: The use of the Internet is constantly growing. How many randomly selected adults must be surveyed to…

A: Solution

Q: When comparing two population mean, failing to reject H, means that the two population means are…

A: It is given that H0 is not rejected.

Q: A sample of size 80 which found to contain 21 smokers. What is the sample proportion of non-smokers…

A: A population is the complete set of elements for which the study or experiment is conducted. A…

Q: 5. Suppose a 12 year old asked you to explain the difference between a sample and a population, how…

A: As per our guidelines, we are allowed to answer first question only. Please repost next question…

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A: It is given that margin of error (E) is 0.07 and the confidence level is 0.95.Here,

Q: Explain in your own words the advantages of bigger random samples in a sample survey

A: Explain in your own words the advantages of bigger random samples in a sample survey

Q: If we have a statistical community with only six vocabulary, and you need to choose a sample of only…

A: Given that, in a statistical community there are six vocabulary and we need to choose three sample…

Q: The required sample size equals:

A: It is given that, H0: μ = 13.50 Vs. H1:  μ>13.50. The sample mean based upon some sample size =…

Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: To determine whether a sample should be treated as a simple random sample, which is more important:…

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: 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: Explain the concept ofrepresentative sampling.

A: Representative sampling: A representative sample is a subset of a population that seeks to correctly…

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: illustrates the effect of sample size on the power of a two-sample t test?

A: A test of hypothesis consists of 2 hypotheses: the null, H0, and the alternative, H1.   For a sample…

Q: A poll in Canada states that 67% of all respondents favor imposing the death penalty. The poll was…

A: Given that - A poll in Canada states that 67% of all respondents favor imposing the death penalty.…

Q: If σ = 35, what sample size would you need to get the standard error to be at most 2.5? If the…

A:

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A:

Q: a) Explain how you can select a systematic sample of size 7 from a population of size 60.

A: Sampling designs: Simple random sampling: In simple random sampling, all the units in the population…

Q: In your opinion, how important is hypothesis testing in research

A: Hypothesis :  Some statement about the population  , which is have to verify by using sample…

Q: Since the sample size is always smaller than the size of the population, the sample mean O A. can be…

A: Correct answer is (A)

Q: What are some limitations of the experience sampling methond? How do the data this method provides…

A: The limitations of experience sampling method and how its data compares with that of self-report…

Q: What is the population and sample of this study?

A: We want to know population and sample in given example.

Q: Explain how you can select a systematic sample of size 7 from a population of size60

A: Determine the procedure for selecting the systematic sample of size 7 from a population of size 60..…

Q: According to the Law of Large Numbers what effect will increasing the sample size have on the sample…

A: It is given that the sample size increases.

Q: Why doesn't it make sense to test the hypothesis that the sample mean is 42?

A: It is given that the hypothesis test is sample mean is 42.

Q: What is the average IQ of these subjects?

A:

Q: Is the sample size of survey is multiplied by 100, then by what factor is the margin of error…

A: Solution

Q: Blank are more representative of a population, but blank are easier to obtain

A: The sample is a set of units that is obtained from a population, which represents the population.…

Q: What is the importance of getting a sample from a population? When and why is it necessary?

A: The population is defined as a large group in which the units involved have the same…

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 is sampling often preferable to conducting a census for the purpose of obtaining information…

A: Taking a sample is speedy and more cost effective than carrying out a census, and more knowledge…

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: What are the practical Reasons for learning how to use the formula in determining sample size?

A: The two major factors affecting the power of a study are the sample size and the effect size A…

Q: A poll found that 83% of people out of a survey of size 127 watch at least three hours of TV per…

A: Given: A poll found that 83% of people out of a survey of size 127 watch at least three hours of TV…

Q: We are interested in conducting a study in order to determine what percentage of voters of a state…

A:

Q: What is the sample size (n=) and what consequences will the sample size have on my analysis and…

A: Sample size: A sample size is a subset of the desired population. It is a part of the population. It…

Q: For quality assurance, every fifth package on an assembly line is selected and tested for…

A: Given that for quality assurance, every fifth package on an assembly line is selected and tested for…

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: is statistics used to infer the results based on a sample to a population. *

A: Statistical inference consists in the use of statistics to draw conclusions about some unknown…

Q: A poll found that 71% of people out of a survey of size 130 watch at least three hours of TV per…

A: From the given information,   A poll found that 71% of people out of a survey of size 130 watch at…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A: Given that, Critical value: Using the z-table, the critical value at 90% confidence level is

Q: Your goal is to estimate a population proportion with a sample size n = 700 and the sample…

A: Here check condition use z critical for confidence interval of population proportion

Q: Discuss the four different sampling methods, and for each method, explain why we might use it.

A: Here we need to discuss four different types of sampling methods with their uses.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.