Why researcher use different estimation method in order to do their research?

Q: Describe the statistical techniques of Moving Averages and Exponential Smoothing?

A:

Q: How do the results compare to the percentage using the empirical rule?

A: Empirical rule: The empirical rule states that it was for a normal distribution data. It falls…

Q: how are parameters and statistics related?

A: Parameter: The parameter is used to explain the entire population. For example, a teacher calculated…

Q: What is an important property of estimates of effect size?

A: An effect size which is used to indicate the difference between two sample means divided by the…

Q: The manager of the Danvers-Hilton Resort Hotel stated that the mean guest bill for a weekend is $600…

A: We have the following information: The manager states that mean guest bill for a week-end is $600 or…

Q: There are 3 kinds of estimation approaches

A: There are more than 3 kinds of estimation approaches like as  Maximum likelihood Method ,  Method of…

Q: List two ways that you can improve statistical power.

A: Methods to increase statistical power:-   1. use a large sample- if we use  larger sample then it…

Q: The average verbal SAT score for the entire class of entering freshmen is 530. However, if you…

A: given  The average verbal SAT score for the entire class of entering freshmen is 530. However, if…

Q: FOR ESTIMATION OF PARAMETERS IN STATISTICS: What are the Types of Estimates? How to estimate a Mean?

A: In Estimation of Parameter in statistics there are two types of estimation, i. Point Estimation  ii.…

Q: Why is the response rate an important consideration in survey? And give some examples to…

A: If response rate is low, results may notdemonstrate the population as well as if response rate was…

Q: What is the effect of having different levels of confidence in estimation of population mean?

A: A confidence interval (C.I.) specifies a set of possible values for a given parameter.

Q: Why should you generally expect some error when estimating a parameter (e.g., a population mean) by…

A: Solution: We have to determine why should we generally expect some error when estimating a…

Q: True or False: Bigger samples can always offer better predictions comparing to smaller samples

A: Small sample has a bias.bias is difference between extpected and true value of parameters under…

Q: How is the number of degrees of freedom available for estimating , the variance of ε, related to the…

A: Let n be total number of variables       k be number of independent variables

Q: how will you relate the formulas for quartiles and deciles of grouped data?

A: The formula for the ith quartile is: Qi=L+in4-cff.w Where L is lower bound of the class, c.f is…

Q: How can the standard error of estimate be interpreted?

A: here use basic of standard error of estimate

Q: Consider taking a point estimate from a randomly selected population of 120 students with a number…

A: The population is defined as a whole set of observations. It is difficult to deal with,…

Q: What is the key property of Standard Error of Estimate?

A: Introduction: The standard error is a measure of dispersion, based on the sampling distribution of…

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: What aspect does the repeated measure test decrease when compared to an independent to test?

A: Given: The repeated measure that results in decreasing the measure test based on comparing with an…

Q: why estimation is important in statistics?

A: Estimation is one of the two branches of inferential statistics.

Q: What is the standard error of the point estimate vou calculated for the previous question?

A: We have given that  Sample size n= 1000 Favorable cases x= 89 Sample proportion p^=x/n = 89/1000 =…

Q: A random sample of 4000 U.S.citizens yielded 2280 who are in favor of gun control legislation. Find…

A: Given:A rondom sample of 4000 U.S citizensyielded 2280 who are in favor of guncontrol…

Q: when do we use the statistical treatments

A: I will discuss when we have to use statistical treatments

Q: List the steps involved in analyzing quantitative data and how would I define and provide examples…

A: Steps to conduct Quantitative Data Analysis: Relate measurement scales with variables Connect…

Q: Identify some methods used in descriptive statistics.

A: Descriptive statistics:Descriptive statistics is defined as the method where the information…

Q: Why is that the mean (µ)  and standard deviation (σ) of populations are difficult/ impossible to…

A: Introduction :-  Here we have to describe or to give reasons to question why population study is…

Q: What are the similarities and differences of statistical inference of single mean as compared to a…

A: Generally, in the testing of a single population mean the distribution of a particular test for the…

Q: Explain how Pearson's Coefficient is utilized to determine the shape of data.

A: Value of Pearson's coefficient of skewness describes the shape of the distributon. As a general rule…

Q: Shark scientists are interested in whether the magnitude of hammer-head shark migration is related…

A: It is given that the, Shark scientists are interested in whether the magnitude of hammer-head shark…

Q: How to Make judgments about the size of the standard error of the estimate from a scatter plot?

A: Standard error: An estimate of the standard deviation of a statistic, based on sample data, is…

Q: What is Standard Error of Estimate?

A: Standard error: The standard error of the estimate is a measure of the accuracy of predictions. The…

Q: Can Discrete quantitative data provide reliable results?

A: Quantitative variables: The quantitative variable is the variable that measures a numerical…

Q: Estimate the difference using benchmarks.

A: Using benchmark we approximate the value.

Q: Why might the range not be the best estimate of variablitiy?

A: Range is the difference between the largest and smallest value in a data set, so if there is an…

Q: Relative to the population mean, what happens to the possible sample means for samples of the same…

A: The sample mean is the average of all the observations sampled from the population.  If we have…

Q: In most cases of study, the statistical analysis is not giving the precise value of measurement but…

A: It is because in most cases we don't have data on the entire population but only a small part of it…

Q: What distinguishes interpolation from other form of approximation?

A: Interpolation is the process of estimating the value of function for any intermediate value on an…

Q: Why a favorite technique for controlling individual differences is referred to as repeated measures?

A: Repeated measures is defined as the measure in which the measurement of a particular subject is…

Q: What are some tips for calculating quartiles?

A: Quartiles are the three points in a data set that divide the data into four equal parts.

Q: How is dfwithin and dftotal calculated in statistics? Please write out words for formulas.

A: Given that

Q: Explain the method of simple averages of computing the indices ofseasonal variations.

A:

Q: What are the four of the most important qualitative methods?

A: Let QM denote Qualitative Methods

Q: When I’m trying to infer the population mean from a small sample, why do I have to rely on the…

A: Assumptions to use standard normal distribution to estimate population mean:The required conditions…

Q: Technically, what is a nonparametric method? In current statistical practice, how is that term used?

A: Non-parametric method:This method is distribution free method. That is, in this process, the…