A researcher wants to find if there are associations between heart diseases and several variables. The variables are: history of heart diseases in the family, amount of exercise, and alcohol consumption. For which of the variables is a statistical experiment possible?

Q: If an observed correlation value is -.45 and the table value for Pearson Correlation is 450 for a…

A: Here, the observed correlation value is -0.45. The table value for Pearson correlation is 0.45.…

Q: A criminologist studied fear of crime, age, and gender of people who were present for Hurricane…

A: Dependent variable:The dependent variable is the quantity under study based on a number of factors,…

Q: When conducting a significance test for correlation, if your null and alternative hypothesis are:…

A: Test is that whether or not the correlation is significant.

Q: What statistical test would you use to compare three different groups on some dependent variable?

A: Given : What statistical test would you use to compare three different groups on some dependent…

Q: In a study to see if there is a relationship between students' consumption of alcoholic beverages…

A: As per question, There is relationship between student’s consumption of alcoholic beverages and…

Q: You are told that a study is a 3 x 3 ANOVA. Make up variables and conditions for such a study, and…

A: In Following example shows Make up variables and conditions for such a study, and create a diagram…

Q: If the correlation between two variables is close to 0, you can conclude that a scatterplot would…

A: Correlation tell us association between two variables. Correlation coefficient ranges from -1 to…

Q: The XYZ company wants to see if interview scores predict job performance scores. So it goes back…

A: The claim is to check whether there is a relationship between employee interview scores and employee…

Q: If a study finds that there is a positive correlation between the number of roads in a city and the…

A: Correlation measures linear relationship between two variables. Given, a positive correlation is…

Q: A researcher wanted to know if there is an association between exercise and sleep for the population…

A:

Q: Which of the 3 measures of central tendency will help a teacher determine the tardiest student in…

A: for tardiest student in the class: 1) Mean 2) Median 3) Mode

Q: Which of the following would decrease the value of the test statistic when dependent samples or…

A: Note: Since the options are not provided we have given the general answer. Please provide answer…

Q: In experiments, it is important to consider the potential confounding variables, which could…

A: A confounding variable is an unwanted factor that is capable of influencing the result of aa study…

Q: How can you verify whether the linear correlation between two variables in a scatterplot is…

A: Correlation:Correlation a measure which indicates the “go-togetherness” of two data sets. It can be…

Q: n Statistics, what kind of graphs are required to present this data? And what other kind of test of…

A: A boxplot is a great option to compare between two or more groups of data based on a five-point…

Q: What variable of this study could have been controlled?

A: Controlling for a variable means measuring extraneous variables and removing them as they do not…

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: What is correlation in regards to psychology?

A: Correlation is a technique that shows the strength of the relationship and whether a pair of…

Q: Though not a favorite example, this problem is based on the sample demonstration problem used in the…

A: The null and alternative hypothesis are given by : Ho : μ1=μ2=μ3=μ4H1 : At-least two of the means…

Q: Individuals with strong religious beliefs often turn to their faith to cope with stressful life…

A: Solution: The given table of data is

Q: The correlation between "trust in the government to take care of its citizens" and worry about one's…

A: If the p-value is low (< 0.05), then the correlation is statistically significant. Here the…

Q: If you calculate the sample covariance between two variables X and Y equals one, then there must be…

A:

Q: stimulus person giving a speech. All stimulus persons gave the same verbal speech. After observing…

A: Solution

Q: Would you expect the correlation between High School GPA and College GPA to be higher when taken…

A:

Q: A paired groups design is more sensitive than an independent groups design if? a) There are large…

A: Inter-subject differences: Inter-subject differences means there is variability present inside the…

Q: Suppose you were to collect data for the following pair of variables, people: age, grip strength.…

A: An explanatory variable explains or predicts changes in the response variable. A response variable…

Q: The researcher believes that happy workers are more productive workers. So he administers a job…

A: It is given that the researcher believes that happy workers are more productive workers.

Q: er, which type of statistical test is most appropriate?

A: There are various statistical test that can help in exploring the relationship between two…

Q: If two random variables are independent, then a. knowing the value that one takes on tells nothing…

A: We have given that  X and Y are independent random variable  C(X,Y)=E(XY) -E(X)E(Y)

Q: What is the value of the correlation coefficient r across the entire data set (all 10 students)?

A: INTRODUCTION :   CORRELATION:  In a bivariate distribution, we may be interested to find out if…

Q: What correlation method should be used in the following situations:

A: The choice of associational statistic is dependent on two parameters.

Q: Do the data give evidence that certain color cars get more speeding citations (tickets) than you…

A: % Observed Expected (O-E)^2 (O-E)^2/E 12 19 14.4 21.16 1.469444 20 28 24 16 0.666667 19 30…

Q: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the…

A: Given Information: Dr Guidry is interested in examining the relationship between the number of…

Q: What is the symbol for the sample linear coefficient correlation?

A: Linear correlation coefficient is denoted by r.

Q: A sample survey by Comcast asked a random sample of customers about use of the Internet and about…

A: The test is to check whether there is a relationship between Internet use and community type or not.…

Q: Illustrate the sample covariance of a sample with itself?

A: Sample Covariance is defined as  Let x and y be two variables. The sample covariance is defined as…

Q: what does it means that the variable are positively correlated?

A: Positive correlation is a courting among variables where in each variables circulate in tandem—that…

Q: A parent groups design is more sensitive than an independent groups design if? a) There are large…

A: A parent groups design is more sensitive than an independent groups design if there is a high…

Q: During the exam you will be using a sample of 500 adults with the following variables: ● genhelf -…

A: Given that  During the exam using a sample of 500 adults with the variables genhelf-variable…

Q: Suppose a researcher found that the correlation between a test he or she developed and job…

A: Introduction: Suppose r is the sample correlation coefficient between two variables, based on a…

Q: A researcher wants to know if there is an association between feelings of hunger and aggressive…

A:

Q: Suppose we wish to compare the health status of two groups of people. What variables might we use to…

A: Given information: The investigator is specially interested to compare the health status of two…

Q: What variables do Teczar find have the most significant controlled associations with women in…

A: The correlation is a statistical technique that is used for analyzing the behavior and association…

Q: A 2017 study of 10,478 Bangladesh children tracked the washing habits of the children's mothers via…

A: The claim of the test is that there is relationship between washing habits and food security. The…

Q: Suppose that you conduct a study in which you observe parents and their children interacting at…

A: We have to choose corect option.

Q: If the correlation coefficient is 0.8, the percentage of variation in the response variable…

A: Given: correlation coefficient =0.8

Q: child and their family were interviewed to assess whether there might be an association between…

A: In case-control studies, the subjects of the study are generally divided into two groups, the “cases…

Q: from a correlation?

A: How Causation May Be Wrongly Inferred from Correlation: Common causal: When we talk about a…