Explain what “selection on unobservables" and "selection on observables" mean, in relation to the evaluation of policies with observational data

Q: What type of key performance indicators and other information would be appropriate to display on a…

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

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Q: Distinguish between frequentist and subjective approaches?

A: 1. The frequentist approach is the statistical tool that is used to determine the conclusions from…

Q: In a study on attitudes toward the blacks, participants are asked questions such as, “Do you believe…

A: In a study on attitudes toward the blacks, participants are asked questions such as, “Do you believe…

Q: what statistical tool to use in:  significant difference between the set of factors identified by…

A: introduction - statistical tools - Statistical tools are used for planning , designing , decision…

Q: Distinguish between observational and experimental types of studies?

A: An observational study is a study in which researchers simply collect data based on the data…

Q: What is the advantage of removing the variability caused by individual differences in a…

A: A within-subject design is a type of experimental design in which all participants are exposed to…

Q: What are the assumptions for a paired difference experimental design?

A: In paired experimental design, each study unit contributes a pair of observations which implies…

Q: Explain when the empirical rule can be used to help describe data in a population or sample,…

A: The empirical rule for a normally distributed random variable is as follows: Approximately 68% of…

Q: The sample statistic that is unbiased estimator is:

A: Note:Hey there! Thank you for the question. However, you have not posted a complete question.…

Q: Describe what does a non-statistical evaluation of the graphs of data for the two-factor experiment…

A: In design of experiment , "Factorial design" allows experiment to do study on many factors…

Q: Differentiate between measure of central tendency and measure of dispersion

A: Solution: Descriptive statistics helps in the analysis of dataset by summarizing and graphically…

Q: How does the mean age of employees affect their performance? Why is there a need to strictly…

A: It is given to determine whether or not the mean age of employees affect their performance.

Q: What are the differences between histograms and Pareto diagram? Elaborate

A: Introduction :-  Here we have to explain what is the difference between histogram and Pareto…

Q: What is an example of criterion validity?

A: Criterion validity  To evaluate criterion validity ytou calculate the correlation between the…

Q: of this calculation and how do they mean and median each represent the central tendency of this data…

A: Data set : 0 5 10 15 20 25 Mean 12.5 Median 12.5 Mode No Mode as there are no repeated values…

Q: According to the ANOVA, should the set of three means for adolescents on “Physical appearance” be…

A: Given: F Value = 0.81

Q: Suppose a neighborhood has few expensive homes and many low value homes. Which measure of central…

A: From the given information, Distribution of value of homes is positively skewed and for positively…

Q: What is Studentized Range Statistic?

A: Studentized Range Statistics was created by William Gosset, also called Student (hence the same…

Q: What is the explanatory variable ?

A: What is the explanatory variable ?

Q: _________ is the best measure of central tendency you can use for continuous data that is skewed

A: Given that, The distribution is skewed.

Q: Why do the study on the data variability is called as the complementary to the study on central…

A: Central tendency is the tendency of the quantitative data set to cluster around the some central…

Q: Differentiate between sensitivity analysis and scenario analysis.

A: The difference between the two methods is that sensitivity analysics examines the effect of changing…

Q: What does it mean that a sample statistic is an unbiased estimator of a population parameter?

A: A statistic is called an unbiased estimator of a population parameter if the mean of the sampling…

Q: Discuss all possible factors that would affect the validity of test scores

A: A test score is the value of the test statistic when the values of the parameter are put.

Q: Why is there a need to strictly consider the critical value and test-statistic value in the decision…

A: Critical value: the value of test distribution which separates the critical( rejection) region and…

Q: give a comprehensive comparison and contrasting about experimental and non experimental research

A: Experimental research is the type of research that uses a scientific approach towards manipulating…

Q: key difference between summative evaluations and utcome evaluations is that summative evaluations…

A: It is an important part of statistics. It is widely used.

Q: What is the best measure of central tendency for 2 nominal level variables and why?

A: Nominal scales are used, without any quantitative significance, to label variables. One might…

Q: Define Omitted Variable Bias? Explain Solutions to omitted variable bias when the variable is…

A: Omitted variable bias is the bias that arise when the regressor, X, is associated with an omitted…

Q: What is Measures of Central Tendency? The most common measures of central tendency?

A: What is Measures of Central Tendency? The most common measures of central tendency? A measure of…

Q: Is it possible for a statistic to be unbiased yet very imprecise? How about being very accurate but…

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Q: What is the value of descriptive and inferential statistics in effective quality management?

A: Quality management uses Statistics to see the quality of the problem and then to identify the…

Q: Describe the differences between symmetrical and asymmetrical measures of association.

A: We have to describe the differwnces between symmetrical and asymmetrical measure of association.

Q: Explain why Control Charts generally do not require Normality Study. Name the one Control Chart that…

A: Please find the explanation below. Thank you.

Q: Regarding the criterion used to decide on the line that best fits a set of data points, a. what is…

A: a) The criterion used to decide whether or not the line best matches the given set of data is called…

Q: What is omitted variable bias?

A: The omitted variable bias is very useful concept in the statistics. A type of the selection bias…

Q: How does the duality theory play a central role in a sensitivity analysis?

A: Duality or Duality Theory in linear programming is essentially a theory that develops the…

Q: 2. Why is it necessary to have more than one method for measuring central tendency?

A: Measures of center: Mean: The arithmetic mean (also called the mean) is the most commonly used…

Q: Differentiate the three measures of central tendency: ungrouped data.

A: The three measures of central tendency are : 1) Mean 2) Median 3) Mode MEAN →The arithmetic mean is…

Q: What is the maximum number of dummy variables that can be defined when a qualitative variable has 4…

A: When we have m categories of the variable then we define (m - 1) dummy variables.

Q: 3. During the past few months, major league baseball players were in the process of negotiating with…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: What are the explanatory and response variables?

A: Response variable is defined as the variable which depends on other variable i.e changes on changing…

Q: Explain the concept of Measurement Error and Errors-in-Variables Bias with suitable example?

A: Errors are difference between observed value and estimated value .

Q: There may be systematic differences on a variety of levels between those who choose to participate…

A: There may be systematic differences on a variety of levels between those who choose to participate…