Calculate and interpret the sample correlation coefficient between gambling and family abuse.

Q: Does the sample median tend to target the population variance

A: If the original distribution is normal, the sample mean will also be normal, with variance , where n…

Q: Calculate and interpret the sample covariance and sample correlation coefficient. Based upon the…

A: Given Data : X = Duration of meeting Y = Satisfaction score 20 2 40 5 15 5 35 2 40 4…

Q: Differentiate between causation and correlation, and explain why this distinction is important

A: Correlation is a statistical term whichdescribes relation between two variables. It does not however…

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

A:

Q: How is a sample related to a​ population?

A: Population is set of all elements about which we want to know. While the sample is a part of such…

Q: What is sample variance?

A: In very simple words, Sample variance means the variability in the sample around its average value.…

Q: What is the Correlation Coefficient , between ‘case analysis score’ and ‘oral presentation score.’ ?…

A: c)   The value of r(correlation) between ‘case analysis score’ and ‘oral presentation score’ is…

Q: How to calculate the sample correlation and covariance

A: Covariance and correlation are used to measure the linear relationship between two or more…

Q: Find the variance for the given sample data. 18, 18, 18, 9, 15, 5, 10, 5, 15,10,15

A: The sample mean is, x¯=∑iXn=18+18+18+9+15+5+10+5+15+10+1511=13811=12.5455 The sample mean is…

Q: Why sample covariance and correlation is used for?

A: Co-variance and correlation measure linear relationship between the variables.   Sample co-variance:…

Q: Consider the mean, median, and mode. Which is the best measure of central tendency? Why

A: Central tendency refers to the idea that there is one number that best summarizes the entire set of…

Q: how does the sample and population relate?

A: Sample and population both are different items, but both are related with each other. Population is…

Q: What is an unusually small or unusually large data value called? a. outlier b. sample statistic C.…

A: an unusually small or unusually large data value is called ?

Q: Illustrate the mean or expected value, variance and standard deviation

A: given: x f xf (x- x )2 f*(x- x )2 4 1 4 25 25 5 2 10 16 32 8 2 16 1 2 10 2 20 1 2 13 2…

Q: What is the name of this type of sample?

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

Q: To quantify the average discrepancy between sample means and population means, researchers compute

A: This part comes under estimator estimation

Q: Explain the difference between an independent and dependent sample. Give an example of each.

A: Dependent samples:The two samples are said to be dependent if there exist an effect of one on…

Q: Can we say that there is a significant negative correlation among the data? (a = .10)

A: To test that if there is a significant negative correlation among the data, first we have to…

Q: The amount spent on textbooks for the fall term was recorded for a sample of five university…

A: According to the provided information, the data are $400, $350, $600, $525, and $450

Q: What is the relationship between a frequency or relativefrequency distribution of a quantitative…

A: Justification:Qualitative and quantitative data:Qualitative data are non-numerical measures such as…

Q: a. Is there a statistically significant relationship between gender and party preference? b. Compute…

A: The following information has been provided :   Male Female Total Democrat 10 15 25…

Q: What is the linear correlation, test statistics, and p-value?

A:

Q: What is Sample?

A:

Q: Distinguish briefly the Population and sample

A: Population : The population is a wider group of people, items, events, etc on the basis of which…

Q: List three reasons why samples are used in statistics

A: Solution: Population is the entire set of units under study. Sample is the subset of population.

Q: Is the sample mean always the most frequently occurring value? If so, explain why. If not, give an…

A: No, Sample Mean is not the most frequent Occuring Value.   Mean= Sum of Observations / No.of…

Q: What is the variance of the data set 14,23,9,12,21,18,8

A:

Q: which one is more precise sample variance or population variance

A: We want to tell you which one is more precise.

Q: Explain why the formulas for sample variance and population variance are different.

A: Here's the explanation is as follows; Sample Variance : It is used to calculate how varied a sample…

Q: Calculate the Variance, Frequency, and Percentage of the given sample Research Data.

A: Given information: Data(x) 2 6 8 24 26 52 55 75 75 96 128 135 135 156 165

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: What does it mean when sample results are not statistically significant?

A: statistically significant: In principle, a statistically significant result (usually a difference)…

Q: what is the difference between grouped and ungrouped data?

A: Data can be classified as grouped data and ungrouped data.

Q: As sample size gets smaller, what happens to the magnitude of the correlation necessary for…

A: Magnitude of Correlations is the absolute value of r which represents the strength of association.…

Q: Why is it important to report both a measure of central tendency and variability to describe a set…

A: Basic idea about measures of central tendency and dispersion Measure of Central tendency is the…

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: In data analysis, which of the two will you consider the most: Mean or variance? Discuss.

A: Mean is a central tendency,  sum of a collection of numerical data divided by the count of data in…

Q: Is there a linear association between age and days? Explain using the sample illustration below.

A: Scatter plot is a graph that shows the direction as well as linearity of the relationship between…

Q: What is Variability within Groups?

A: The term variability within groups is used in ANOVA technique, it is also known as error variance…

Q: Why is correlation not causation?

A: Correlational research is a kind of research that involves non-experimental research.

Q: find population variance for given data  15,85,96,75,46,35,21,56,54,47

A:

Q: What is Sample Mean?

A: A statistical population is a set of entities from which statistical inferences are to be drawn,…

Q: Why is hair color classified as categorical data?

A: In categorical variable we simply assign labels for identification. Categorical values are discrete…

Q: A university would like to describe the relationship between the GPA and the starting monthly salary…

A: Calculate Correlation Coefficient r without cov(x,y) from the following data X Y 2500 3.1…

Q: find sample variance of data   45,85,63,21,54,25,85,65

A:

Q: What is the sample for the study

A: The sample is the subset of the population.

Q: What does it mean to say "correlation" does not imply causation?

A: Correlation between two variables means they are linearly related to each other Causation means…

Q: What is the mean difference between the samples?

A: Test is that whether the mean number of mass transit trips is equal for both neighborhoods. Note :…

Q: What is the symbol for the sample variance?

A: Explanation:

Q: Define Sample?

A: Sample is defined as small set of data that is chosen from large population by using predefined…

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related. 

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.