Calculate the covariance between the two variables below (3 significant digits in FINAL answer): Observation 2 Funding 18 10 12 Outcome 4 16 6 Answer:
Q: Determine the dependent and independent variable of the following statement: 1. The Effect of…
A: Given Statement : The Effect of Structure Peer Assisted Instruction to the Academic Performance of…
Q: Which of the following would be considered an ordinal variable? Treatment, measured as 1=Treatment,…
A: Ordinal variable represents categories which can be ordered like very bad, bad, good, very good,…
Q: The following SAS program is submitted: 1 data work.passengers; 2 if OrigPassengers - then…
A: The SAS code is given.Want the output of the above SAS code?Note: This code is run into SAS on…
Q: C. Give what is ask in each item. An aerobic exercise instructor remembers the data given in the…
A: Correlation are used to measure the strength of association between the two numerical variable. The…
Q: To determine the endogenous variables and exogenous variables use the given diagram in the image.
A: In a statistical model, an endogenous variable is a dependent variable which gets effected or…
Q: Choose the variable that is unlikely to be correlated with the number of teachers in a city.…
A: Option A is the answer. Explanation : Here we are talking about number of teachers,but in option A…
Q: To test whether the data indicate significant difference in effectiveness of the two medicines the…
A: Since we are comparing two different groups of people, the values are not dependent on each other.…
Q: Find the total deviation for city 23 in the sample.
A: Given information: X: The mean atmospheric temperature. Y: The sales. Where Y is the dependent…
Q: Develop the estimated regression equation to show how overall customer satisfaction is related to…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: The director of a local Tourism Authority would like to know whether a family’s annual expenditure…
A: Given,
Q: Generally speaking, if two variables are unrelated (as one increases, the other shows no pattern),…
A: (1) a positive or negative number close to zero; correlation value (r) as close to zero explains…
Q: A researcher was investigating variables that might be associated with the academic performance of…
A: The formula of F test statistic is,where,MSR denotes the mean sum of regression squaresMSE denotes…
Q: If the variable “Attractiveness” increases and the variable “Weight” appears to go down, we would…
A: Correlation: The extent linear relation between the two variables is called correlation. Positive…
Q: You use “number of hours spent relaxing” as the dependent variable in a study. Choose two possible…
A: Are dependent variable is the one that is affected by the change in the value of the independent…
Q: Identify the most likely type of relationship between the two variables for each scenario. Assume…
A: Identifying the most likely type of relationship between the two variables for each…
Q: A research study was conducted to examine if a new antidepressant could lower depression for…
A: This problem can be solved by defining dependent and independent variable.
Q: Find the explained deviation for city 21 in the sample.
A: The given data is City x y 1 92.8 37.62 2 84 39.18 3 73.8 45.57 4 74.5 25.53 5 83 31.62…
Q: The director of a local Tourism Authority would like to know whether a family’s annual expenditure…
A: calculation procedure for correlationsum of (x) = ∑x = 520.4sum of (y) = ∑y = 48sum of (x^2)= ∑x^2 =…
Q: A consultant has made two statements about data: 1. to be useful, data must be processed in order to…
A: Data: It may be defined as the collected raw facts which are meaningless. It comprises of letters,…
Q: Five students taking a Business Statistics module at MANCOSA were asked to provide an example of a…
A: Five students taking a Business Statistics module at MANCOSA were asked to provide an example of a…
Q: The director of a local Tourism Authority would like to know whether a family’s annual expenditure…
A: In statistics, there will be variables in the data. O one variable shows related variation in the…
Q: What is the answer for following data? 1) find the correlation coefficient? 2) identify the type of…
A: Correlation: Correlation is the measure of association between two variables in which one variable…
Q: Find the estimated regression equation for this sample. =9.382 +0.358 x (1) -11.770+0.137 x (2) (3)…
A: The given data is City x y 1 92.8 37.62 2 84 39.18 3 73.8 45.57 4 74.5 25.53 5 83 31.62…
Q: 2. off Determine if the correlation between the two given variables is likely to be positive or…
A:
Q: Content analysis: Read the following hypothesis and carefully answer each question below: News…
A: Note: Since you have posted questions with multiple subparts we will solve the first three questions…
Q: Campute the correlation co-efficient between the variables X and Y represented b) following table: X…
A: The formula for the calculation of correlation co-efficient is r=n∑xy−∑x⋅∑yn∑x2−∑x2×n∑y2−∑y2.
Q: Use the sample estimated regression equation to compute the predicted the mean sales per day in…
A: Given data: City x y 1 92.8 37.62 2 84 39.18 3 73.8 45.57 4 74.5 25.53 5 83 31.62 6…
Q: 2:35 4 Feels Close to People at their School Feels Sad or or Hopeless Strongly Agree Agreed Unsure…
A: The chi-square contingency table and the software output for the chi-square test of independence is…
Q: A study provides data on variables that may be related to the number of weeks a manufacturing worker…
A: Solution: From the given information, the dependent variable is the number of weeks and the…
Q: A problem with polling is whether or not people are willing to answer honestly. If a question might…
A: Given that - A problem with polling is whether or not people are willing to answer honestly. If a…
Q: A local retailer is trying to cut down on shipping costs. They are debating between FedEx or UPS as…
A: a). If difference of FedEx and Ups is different from zero, then it can be said that there is a…
Q: A study is conducted to determine the relationship between study hours and exam scores, what is the…
A: A dependent variable is a variable that depends on other factors or variable that are measured. An…
Q: The following data was collected to explore how a student's age and GPA affect the number of parking…
A: Multiple linear regression: Suppose (x1, y1), (x2, y2)---(xn, yn) are n pairs of observations on…
Q: Consider the following values of the independent variable: -88, following is true? x=98 (1) (3) (5)…
A: Given information: X: The mean atmospheric temperature. Y: The sales. Where Y is the dependent…
Q: lecture(12.9): Identify the following variables as categorical or numerical. (a) Th ethnicity of…
A: Introduction: There are two types of variables Categorical Variables Quantitative Variables…
Q: A sociologist is interested in determining if those shopping at the mall tend to spend more money if…
A: a. Conditions: The two samples are selected randomly and independent. Each population from the…
Q: Calculate the covariance between the two variables below (3 significant digits in FlINAL answer):…
A: The formula for covariance is given below: CovX,Y=∑x-x¯y-y¯n-1 Observation Funding (x) Outcome…
Q: 20. Which among the following variables is likely to be a dependent variable?
A: Here final exam score can be depends on number of hour of study he has given for the exam
Q: What type of relationship exists between the two variables x and y in the scatter plot? A.Positive…
A: What type of relationship exists between the two variables x and y in the scatter plot?
Q: Mr. Friend noticed that meetings tended to start late when there were a lot of people in attendance…
A: Results can be analysed by using excel functions (i) Enter the data in excel . (ii) Go to Data…
Q: C. Give an example for each of the following: a. Two variables in which you have enough reasons to…
A: We will solve this from statistical point of view
Step by step
Solved in 3 steps with 2 images
- find : c ) Does data provide evid. of an association between age and opinion of brand? Justify your answer.The data provides information on life expectancy and the number of televisions per thousand people in a sample of 22 countries, as reported by the world almanac and book of facts 2006 A. Describe the Direction and strength of the correlation between the two variables B. Because of the association between the variables, someone might mistakenly conclude that simply sending televisions to the countries with the lower life expectancies would cause their inhabitants to live longer. Comment on this argument and the reason televisions are likely associated with longer life expectancies C. In general, if two variables are strongly associated, does it follow there must be a cause and effect relationship between them? ExplainPrincipal components analysis is best suited for O A. none of these B. highly correlated variables C. all variables D. uncorrelated variables
- Consider the following scenario and answer the questions below: The ornithologist decided to investigate the effect of temperature on the migration of North American birds. Develop a hypothesis in the appropriate format. Identify the independent variable. Identify the dependent variable. Plan an investigation (what would she do to collect data?). Did she engage in basic science or applied science? Explain. Did she engage in inductive or deductive reasoning? ExplainYour younger brother, a fourth form practical geography student wishes to test whether there could be some relationship between annual visits to a local market by all residents surrounding that market. After a well-designed field study he obtains the following figures: Number of visits per year 21 13 19 18 17 17 14 20 10 11 Residence distance from market (KM) 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 From the information above, what is the dependent variable and what is the explanatory variable? Using (i) above, obtain the regression equation of Yi on Xi. Hence, estimate the residence distance from the market (in KM) if the number of visits are 16 visits Sketch your results in (ii) above. What conclusion can you draw from your sketch?Suppose that, as part of a research methods class, Bailey was asked to write a summary of a research paper on the topic of the effects of visitor traffic on the relative humidity in bat caves. Identify the explanatory and the response variables. The number of visitors and the relative humidity are the response variables. The number of visitors is the response variable, and the relative humidity is the explanatory variable. The number of visitors and the relative humidity are the explanatory variables. The number of visitors is the explanatory variable, and the relative humidity is the response variable.
- e. Compute the covariance and correlation coefficient r between the right tire pressure. f. How do you know the relationship between pressure in the left and right tires is positive. g. What value would a correlation coefficient (r) be close to if there was no (linear) relationship between the 2 tire pressures?Which of the following is not equivalent to the other three? Choose the correct answer below. O Dependent variable Independent variable 000 O Predictor variable O Explanatory variablean experiment conducted to evaluate the effectiveness of different study strategies. One part asked students to prepare for a test by reading a passage. Students answered questions after reading the passage. students were given a test on the passage material and the reasearchers recorded the number of correct answers, What is the dependent variable for this study
- Freshcrim specializes in the sales of ice cream from street trolleys in the centers of many cities. Some factorsthat may determine the sales of ice cream are: the atmospheric temperature, the location of the trolley, therain and the humidity. However, there exists a hypothesis that the sales of ice cream during the summer aresignificantly correlated only with atmospheric temperature. They defined two variables: X : the meanatmospheric temperature and Y : the sales. They considered the month of July of this year in a randomsample of 30 cities. For each city in the sample, let x be the mean temperature in degrees Fahrenheit and ythe mean sales per day in dollars per 100,000 residents. The data are given below. A regression model wasrun, with Y as the dependent variable and X as the independent variable.Write a report using Word. Cover the following topics. This file contains some information about different cars. Car Weight (pounds), x Miles per Gallon, y A 2750 31.5 B 3120 27.9 C 3385 23.7 D 3740 23.3 E 4225 21 Create a scatterplot for the data in the Weight and Braking columns. Paste it here. a) Using StatCrunch or TI 83/84 to calculate the linear correlation between the data in the Weight and MPG columns. b) Explain the mathematical relationship between Weight and MPG based on the linear correlation coefficient. Be certain to include comments about the magnitude and the direction of the correlation. c) Write the equation for the least-squares regression line if there is one. d) Predict the miles per gallon of car C and compute the residual.