What is the df value for the chi-square statistic?

Q: Researchers conducting a study of 15 children with a diagnosis of ADHD wish to assess whether the…

A: Solution-: Given data: 28,26,26,35,30,21,35,21,35,27,30,29,21,28,26 We want to find Q1=?

Q: A magazine tested LCD televisions. The table below shows the overall quality score and cost in…

A: Solution

Q: If there is a main effect of maternal diet (alcohol vs non alcohol), is the main effect of maternal…

A: From the above figure, the significance value for diet variable is '0' which means there is no…

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: you have data on smoking status in males (n= 20) and females (n= 15 and want to see if males smoke…

A: We have to determine which statement is true for given situation.Sample sizes n1=20 ,n2=15

Q: When we reference the "factor" in an ANOVA, this points to the: The levels within the Dependent…

A: We know that  Factor :  It is the independent variable present in ANOVA. Which affect the dependent…

Q: Data collected from supermarket checkout counters can be used to evaluate the effect of price on the…

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

Q: How do you find the Homogeneity of Variance met? How do you know?

A: Homogeneity of variance is an assumption in statistics used both for t and F tests, especially in…

Q: Krista wants to compare males and females on number of hours of physical activity done per week. If…

A: The number of hours Physical activity done by males are collected. Similarity the number of hours of…

Q: Regression Statistics Multiple R 0.962746025 R Square 0.926879908 Adjusted R Square 0.926385853…

A: we know that multiple R is the correlation coefficient between independent and dependent variable,…

Q: Could you please help me understand the difference between a z-test and a t-test for in statistics?

A: Both the tests are useful to test the significance of means.Both the tests are assume a normal…

Q: 0 df1=4 S

A: Given:                                  Standard Deviation (S1​) = 100…

Q: What is Pearson's r correlation coefficient for a set of data with values: (2, 3), (4, 5), (6, 7),…

A: Given The data is in the form of (x, y) and it can be arranged in the table as shown below: x y…

Q: The adjusted r2 of the systolic blood pressure (SBP) in relation to whole blood cadmium (Cd) and…

A: Adjusted R square: It explains the fitness of data in a line or curve and it adjust the term in the…

Q: only part 4.

A: If the sample size increases from 8, then the standard deviation, σ decreases.

Q: researcher computes the correlation coefficient r= -0.1389 for an explanatory and response variable.…

A: The correlation coefficient(r)=-0.1389

Q: What is the coefficient of determination and why would you wa

A: The coefficient of determination is the measurement of the goodness of fit i.e. the percentage of…

Q: Then, please write out the technical literature notation for an F test:   F(df1, df2) = ? p .05…

A: 1. F-Test is also known as Fisher's test. It is used to test the equality of variances of two normal…

Q: When do you use the t-statistic and what is the advantage over the z-statistic?

A: Conditions for using t statistic: The t statistic is used in the hypothesis testing, for testing the…

Q: What is percentage of variance explained (r2)? What info does it tell you about the independent…

A: What is percentage of variance explained (r2)=Square of correlation coefficient   What info does it…

Q: Knee injury: The anterior cruciate ligament (ACL) runs diagonally in the middle of the knee. An…

A: Given that: Sample size, n = 94 People with left knee injuries, x = 55 Significance level, α=0.01…

Q: Help with F- Statistic and P-Value please!

A: The mean for sample means is, The sum of square for treatments is, The sum of square for error is,…

Q: True or False: For both AIC and BIC (two statistics we often use to compare model fit), the model…

A: Solution: AIC ( Akaike's Information Criteria ) and BIC ( Bayesian Information Criteria ) are the…

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: True or False? The sample correlation coefficient is equal to the covariance of x and y divided by…

A: Spearman’s correlation coefficient: The correlation between x and y is given as follows:

Q: What is the correlation between z score and observed data

A: Solution: It seems that your question asks you to use a normal probability plot to determine whether…

Q: A researcher is interested in determining whether age influences the level of depression experienced…

A: 1.The dependent variable is a variable or a characteristic of interest considered by the…

Q: The correlation between weight and income is .60 among males and is -.40 among females. Explain the…

A: Correlation: Correlation is the measure of association between two variables in which one variable…

Q: Define the various different forms of correlation tests.  What are their names and when would you…

A: Different forms of correlation tests: 1] Pearson correlation 2] Kendall rank correlation 3] Spearman…

Q: Another car The correlation between a car’s horsepower and its fuel economy (in mpg) is r = -0.869.…

A:

Q: What are the three value to indicate variability of a data set How do you determine whether it is…

A: Variability :  It refers to the difference being shown by the data points within a data set, as…

Q: What is the difference? Please lay out the rules.

A: Hypothesis is the act in statistics in which analyst check the assumptions regarding the population…

Q: 8. Two baseball player in your team has same mean number of score. Player 1 has higher variance than…

A: If two baseball players have the same mean number of scores, but different variances, it means that…

Q: According to the National Health Interview Survey, 2007,       Avg height for men = 69.93 inches…

A: The average weight for men is 192.78 lbs.

Q: Why Squared Correlation Coefficient Does Not Apply to Individual Scores?

A: Squared Correlation coefficient: Squared correlation coefficient is also known as coefficient of…

Q: Can you do (c) and (d) of this dataset?

A: (c) The 30th percentile of the given data set is 643.8060 and it is calculated by using the Excel…

Q: sort of financial aid. Rather than examine the records for all students, the dean randomly selects…

A: Given that  Favorable Cases XX = 118118 Sample Size Nn= 200200 95% confidence interval for…

Q: When do we use a t-statistic instead of a z-statistic to help infer a mean?

A: Hypothesis tests are used to test population claims. It has two population statements, where one is…

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.