Why do you think it is important for a researcher to do a background research to the chosen variables?

Q: The overall differences between treatments is represented by the _________.

A: ANOVA is Analysis of Variance.

Q: What are Independent variables?

A:

Q: Describe about the three positive relationships of Scatterplots?

A: Here's the explanation is as follows; A scatter plot is a type of graph that shows pairs of data…

Q: What would be the differences in approach between qualitative and quantitative

A:

Q: What are the objects of regression?

A: Regression: Regression analysis estimates the effect that changing one independent variable has on…

Q: In this data what is the independent variable and what is the dependent variable?

A: Independent variable-Input variable Dependent variable-Output variable Here we can clearly see that…

Q: The proportion of the variability in sales accounted for by the price of the product is

A: Given; summary of the fitted regression model between x=price and sale=y  Then to find proportion of…

Q: A group of educators want to determine how effective tutoring is in raising students' grades in a…

A: Given: A group of educators want to determine how effective tutoring is in raising students' grades…

Q: Specify which of the variables listed are quantitative and which are categorical.

A:

Q: The Environmental Protection Agency records data on the fuel economy of many different makes of…

A: Basics: Response  variable measures an outcome of a study.

Q: Is all variation necessarily numerical?

A:

Q: Statisticians are often called upon to develop methods to predict one variable from other variables.…

A: Regression analysis estimates the effect that changing one independent variable has on the…

Q: In a survey conducted by a reputable marketing agency, 248 of 1000 adults 19 years of age or older…

A: Here we have to complete the given blanks as per given information

Q: Explain the difference between examining relationships between variables graphically and…

A: Correlation refers to the statistical relationship between two variables.

Q: Define the term indicating variable?

A: Definition : Indicating variables are also called as dummy variables. They takes only binary values…

Q: Many leaners perform well in grade 12 but are still not accepted into universities.explain two…

A: Given:- Since many learners achieve well in grade 12, they have nonetheless turned away from…

Q: Explain why y is considered the least squares estimator of the mean of Y, µy.

A:

Q: Does a high value of r2 imply that two variables are causally related? Explain.

A: Correlation: Correlation analysis is used to measure the strength of the association between…

Q: The researcher found that the model’s effect size was very large where R = .957. Furthermore, R2 =…

A:

Q: What does degrees of freedom for degree of freedom for interaction reflects?

A: The interaction effect is the effect which one factor has on the other factor. The degree of freedom…

Q: A study was done to see whether getting radio airtime and spending money on advertisements…

A: Given information: Sales Advertisements Airtime  330 10.256 43 120 985.685 28 360 1445.56…

Q: With the pandemic, cleaning and sanitation products have become increasingly more popular. Pfizer is…

A: Given that, X1 bar= 5.7, n= 20 And s1= 0.65 X2 bar= 6.2 standard deviation, s2= 1.3   Hypothesis:…

Q: researcher just wants to see if there is a relationship between depression (depressed/not depressed)…

A: Test is that whether there is a relationship between depression and marital status.

Q: A study was done to see whether getting radio airtime and spending money on advertisements…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: I want to know if being an athlete or not would change the resuls to the donut vs. bagel study. I…

A: Given information isIt is a study of donut vs. bagel There are two…

Q: Determine whether the variables is qualitative or quantitative number of infants born in a month

A: Let QlV denote qualitative variable. Let QnV denote quantitative variable.

Q: You just joined the quantitative research team as an independent consultant and wasn’t involved in…

A: Would leave the data or do data imputation to replace the them.  Suppose the number of cases of…

Q: What is the difference between dependent and independent variable?

A: Our aim is to state the difference between dependent and independent variable

Q: Thompson Photo Works purchased several new, highly sophisticated processing machines. The production…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub-parts, according to…

Q: Thompson Photo Works purchased several new, highly sophisticated processing machines. The production…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: The test statistic for the rhino data, x^2= 3.85, suggests that:

A: Given that, The test statistic for the rhino data, x^2= 3.85,

Q: With the pandemic, cleaning and sanitation products have become increasingly more popular. Pfizer is…

A: Let CBS have an average viewership of x1=5.7 with SD s1=0.65. The population mean is μ1. NBC has an…

Q: If a person’s z score equals 2.08, what is their percentile?

A: Given info: The person’s z score equals 2.08.

Q: Define the term Independent Variable?

A: Define the term independent variable.

Q: Benny wonders whether coffee consumption (measures in $ per week) depends on income (measures in $…

A: Here we want  to analyze whether coffee consumption depends on income. We will collect the data for…

Q: A study was done to see whether getting radio airtime and spending money on advertisements…

A: Statistics is the study of the collection, organization, analysis, and interpretation of data. It…

Q: Consider the following data on x = weight (pounds) and y = price (5) for 10 road-

A: Given information: Given data represents the values of the variables X = Weight and Y = Price for a…

Q: Javier sleeps 9 hours the night before his science exam. His twin sister has the same exam and…

A: Here,the comparison is made on the basis of their exam scores.The additional factor is the duration…

Q: Why the regression line is a straight line rather than a curved line?

A:

Q: The Acme School of Locksmiths has been accredited for the past 15 years. Discuss how this…

A: From the given example we want to Know it is qualitative or quantitative.

Q: What does Simple Effect reflects?

A: Given a simple regression line there are two variables in the equation, X (response variable) which…

Q: Mary Grace expected to find that age is related to more conservative political attitudes. However,…

A: Two variable are said to be correlated if change in the one variable affect the change in the second…

Q: independent variable.

A: Measures of variability (sometimes called measures of dispersion) provide descriptive information…

Q: What do you call the measure of how much of the variability in one variable can be explained by…

A: In simple regression, the proportion of variance explained is equal to r2; in multiple regression,…

Q: Thompson Photo Works purchased several new, highly sophisticated processing machines. The production…

A: Given regression equation ŷ = 10.2 + 0.2x1 + 0.486x2 + 0.812x3 + 0.008x4 x4 is the age. Its…

Q: What is the independent variable?

A: What is the independent variable?

Q: For each of these variables, which of the mean, median, or mode would be the best choice to describe…

A: The mean, median, and mode are the most widely used measures of central tendency that are used to…

Q: The process of moving from theory to data, where the data would test the theory, is known as.......?

A: The aim to find the process made to test the theory.

Q: The EPA records data on the fuel economy of many different makes of cars.  They are interested in…

A: In regression theory, dependent variable is the response variable, which is predicted using the…

Q: Below we list several variables. Which of these variables are quantitative, and which are…

A: Quantitative Variable: Variables that can be measured numerically or by interval scale are under…