It is extremely important for a researcher to clearly define the varibales in a study because this helps to determine the type of analysis that can be performed on the data. For example, if a researcher wanted to describe people based on Social Security number, what level of measurement would the variable "Social Security number" be? Now suppose the researcher felt that certain people who lived farther ease received higher numbers. Does the level of measurement of the variable change? If so how? What is the level of measurement of the variable "Social Security number"in the origiinal scenario?

Q: A researcher collects data from 50 different individuals and wants to understand the correlation…

A: The objective of the question is to determine the degrees of freedom in a correlation analysis…

Q: A college counselor wants to determine if the number of hours spent studying for a test can be used…

A: An explanatory variable is the one which can be changed independently or what you manipulate or…

Q: What is the independent variable and dependent variable in this question

A: There are two variables Level of parenting stress Number of children (one child and two or more…

Q: Two different surveys will be conducted to estimate the mean salary of employees who have taken a…

A: The confidence interval inversely depends on the sample size. The formula for the confidence…

Q: The "fishing" approach to data analysis refers to what?

A: " fishing" is a data mining  practice in which large volumes of data are analyzed seeking any…

Q: How can I create a histogram when the only data I have is the percentage of 16 year olds who used…

A: To construct the histogram, the first thing is to determine the number of class intervals. There is…

Q: An business reviews data on the daily amount of calls it receives. Are the data discrete or…

A: Discrete Variable: A variable which assumes only specified values within a given range is a discrete…

Q: As with the Part I Activity, determine which “average” would be a better fit for the data given.…

A: a) Here we have 7 values. In increasing order, they are $423, $436, $489, $500, $530, $650, $650.…

Q: Chi Square tests are used to analyze qualitative data such as opinions, observations or surveys and…

A: Chi-Square Tests: Definitions and Examples Chi-Square Goodness of Fit Test Definition: The…

Q: what is nominal (categorial) data?

A: Categorical data: The type of data that naturally take non-numerical values, such as words that can…

Q: What is the significance of the upper and lower line in the nomogram

A: The nomogram is also known as Rumack-Matthew nomogram.

Q: Give definition of Cross-Sectional Data?

A: Cross-sectional data is a type of data that is gathered by analyzing the various subjects like…

Q: Why do you think it is important for a researcher to do a background research to the chosen…

A: It generally supports the question, what did we know about this topic before I did this study?…

Q: In a study, you ask the subjects their age in years. Is this data qualitative or quantitative?

A: Qualitative data:Qualitative variable categories each individual to corresponding groups. It is used…

Q: Suppose a data set is strongly skewed to the left. Which statement is true? The mean will be larger…

A: It is given that the data set is strongly skewed to the left.

Q: The data used for this assignment was extracted from a NBC News website story that appeared on…

A: 127 1050 130 1050 101 700 88 670 83 640 87 640 89 560

Q: The starting point in a research project should be to determine the method to be used to collect the…

A: The following steps involved in a research project:Choose a TopicReview LiteratureFormulate…

Q: The variable personal desire for aggressive treatment is?

A: Aggression is a typical mental illness. This can be caused because of emotional instability due to…

Q: can a cause and effect relationship be determined?

A: to see if there is a cause and effect relationship between the valence of R&B and Rap songs.…

Q: The data collected without any objective is called numbers True or false

A: The data collected without any objective is called numbers.

Q: Identify two main types of graphical displays that are used for qualitative data.

A: Qualitative variable: A variable that is used for classification of individuals based on some…

Q: please do with rstudio and provide all the codes.

A: The objective of the question is to analyze the relationship between the age of the shopper and the…

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: Measuring the height of a California redwood tree is very difficult because these trees grow to…

A: 1.Step-by-step procedure to obtain the coefficient of determinationusing Excel:In Excel sheet, enter…

Q: When describing a data set, the mean is used with and the median is sed with Z-scores are used to…

A: When describing a data set, the mean is used with average and the median is used with middle value.

Q: If we add a constant (say, d) for all data values, how this will affect the geometric mean ? Give…

A: Consider that x1, x2, x3, x4, x5, …. xn, are the data values. Thus, the GM (geometric men) can be…

Q: If a data set is small , like one that has only six values . Why bother to contrast a histogra

A: From the above given data the following solution is provided below:

Q: A doctor wanted to determine whether there is a relation between a​ male's age and his HDL​…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: If the mean of a data set is 22 and the SD is 5, what % of the values fall between 12 and 27? Give a…

A: given that  mean of a data set is 22

Q: A graph that uses vertical bars to represent qualitative data is called a

A: A graph that uses vertical bars to represents qualitative data is called bar diagram. Thus, the…

Q: A study was undertaken to see how accurate food labeling for calories on food that is considered…

A: Given:

Q: A study was undertaken to see how accurate food labeling for calories on food that is considered…

A: In statistical hypothesis testing, the one-way ANOVA (analysis of variance) test is a commonly used…

Q: A colleague of yours is faced with testing a relationship at the .05 level or significance or the…

A: Level of significance The level of significance is defined as the probability of rejecting a null…

Q: Given the mean of a certain data set as 115, what will be its new mean if all the data points were…

A:

Q: Of the variables you have studied so far, which type yields nonnumerical data?

A: Qualitative variable: A variable that is used for the classification of individuals based on some…

Q: The null hypothesis for this test is:

A: Here, the researcher wants to determine whether or not effects that elevate cholesterol affect males…

Q: If the data points do not lie in a straight line, there is no relationship between the variables…

A: Given:  Let x , y be the two data points If the data points do not lie in a straight line, there is…

Q: uled commercial carriers. Fatalities data include those Departures Fatal Year (millions) Accidents…

A: Given: The provided data for Fatalities is: Year Fatalities 1999 15 2000 25 2001 497 2002…