Q9 Answer TRUE or FALSE for the statements below: The Pearson correlation coefficient (r) measures the degree of association between two variables. The two populations are not identical is the alternative hypothesis in the Mann-Whitney U test. The run test is applied for testing the randomness of the samples. i. ii. iii.
Q: 76 73 72 71 O 18 16 Quality 82 84 67 75 84 78 63 29 30 16 23 28 27 16 27 21 Cost O C. Ho P=0 H, P,#0…
A: The given data is shown in excel and formula is given to calculate the correlation coefficient
Q: Data from 10 individuals in renal failure with high blood pressure are shown in the following table.…
A:
Q: What is the relationship between the attendance at a major league ball game and the total number of…
A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
Q: Compute the Pearson correlation for the following data. X Y 2 3 3 1 6 5 4 4 5 2 Are these sample…
A: The Pearson correlation coefficient is obtained as follows: X Y X2 Y2 XY 2 3 4 9 6 3 1 9 1 3…
Q: A random sample of ten professional athletes produced the following data. The first row is the…
A: Correct answer is Yes since the p-value for the hypothesis test is very close to zero.
Q: A recent study of the relationship between social activity and education for a sample of corporate…
A: Here we have to identify the correct null hypothesis for the analysis.
Q: a. compute and interpret the sample covariance for the below data. b. Compute and interpret the…
A: Solution: a. Enter the data in EXCEL. The sample covariance is calculated by using EXCEL. Thus, the…
Q: A correlation study provides the following data: r = .66 and the study involved 92 participants What…
A:
Q: A biologist looked at the relationship between number of seeds a plant produces and the percent of…
A: The sample correlation coefficient between the two variables can be calculated in excel by using the…
Q: What is the relationship between the attendance at a major league ball game and the total number of…
A: We have given that data Attendance 55 11 36 57 23 11 24 49 11 37 48 49 Runs 7 -0 9 9 5 5 6 7 2…
Q: A researcher wants to determine if the number of years of education for a parent correlates with the…
A: The independent variable is Years of Education of Parent. The dependent variable is Years of…
Q: A researcher wants to determine if the number of years of education for a parent correlates with the…
A: Use EXCEL to obtain the value correlation coefficient r: EXCEL procedure: Go to EXCEL Go to…
Q: A researcher is interested in knowing if there is a relationship between the number of ounces in the…
A: Solution: 1. Let X be the ounces and Y be the price. The given data is
Q: A hypothesis test is conducted at the .05 level of significance to test whether or not the…
A:
Q: shown below. Time Money 16 7 13 28 81 19 17 12 78 50 27 82 21 17 83 101 Round to 2 decimal places.…
A: XY16817191328177812502782211011783
Q: A professor at the University of New Hampshire was interested in evaluating the effect of the…
A: Solution Here the researcher wants to estimate Hampshire was interested in evaluating the effect of…
Q: Can we say that there is a significant positive correlation among the data? (a = .05)
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: A study was done to look at the relationship between number of lovers college students have had in…
A: 1. The correlation coefficient is -0.9001=-0.90 using the Excel formula “=CORREL(F1:F8,G1:G8)” 2)…
Q: A group of undergraduate students at Cal Poly (Mintz, Mintz, Moore, and Schuh, 2002) conducted a…
A: Given n=100, sample mean x̄=0.077125, s=0.036637, population mean μ= 0.10
Q: Compute the Pearson correlation for the following data. X Y 2 3 3 1 6 5 4…
A: Given that Sample size, n =5 here, x̅ = Σx / n =4.000 ȳ = Σy/n =3.000 x y (x-x̅)²…
Q: A biologist looked at the relationship between number of seeds a plant produces and the percent of…
A: The correlation coefficient (r) value tells the strength of the linear relationship between the two…
Q: Perform a hypothesis test to determine if a significant positive correlation exists. Use alpha = 5%.…
A: Given: Temperature, X No. of sunglasses sold, Y 80 131 61 20 56 101 99 62 101 44 95…
Q: A researcher wants to determine if the number of years of education for a parent correlates with the…
A: The data shows the number of years of education of the parent and the number of years of education…
Q: Under which circumstance can the null hypothesis NOT be rejected: The population mean and the sample…
A: In this question we have to explain which of the given option we cannot reject the null hypothesis.…
Q: A study was their GPAs. The results of the survey are shown below. done to look at the relationship…
A: The correlation coefficient between two variables x and y can be calculated using the formula given…
Q: Which of the following denotes the strongest correlation? a. r = 0.54 b. r = -0.63 c. r = 0.43 d. r…
A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…
Q: Interpret the slope of the regression line in the context of the question: For every additional…
A: Given that a biologist looked at the relationship between number of seeds a plant produces and the…
Q: 3. The test-statistic for this data = 4. The p-value for this sample=| (Please show your answer to 3…
A: The data shows the starting hourly wage of three type of position.
Q: Five observations taken for two variables follow. 3 6 11 6 13 50 50 40 60 30 Compute the…
A: We have given the 5 observations for 2 variables. We have to compute the sample correlation…
Q: A reşearcher hears a study report that 30 percent of Americans are obese, and he wants to test that…
A:
Q: Find the linear correlation coefficient between cumulative GPA and each of ACT English score, ACT…
A: The linear correlation coefficient between cumulative GPA and ACT English score is 0.3756 and it is…
Q: A researcher wants to determine if the number of years of education for a parent correlates with the…
A: The independent variable is Years of Education of Parent. The dependent variable is Years of…
Q: A study was done to look at the relationship between number of lovers college students have had in…
A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…
Q: Suppose we wanted to see if there was a correlation between suspension and ethnicity. We have the…
A: Given data is, Suspended Note Suspended Black 17 17 White 65 878
Step by step
Solved in 2 steps
- Correlation (or covariation) means that: Select one: A. the variables involved "go together". B. we have failed to establish an empirical relationship. C. the proposed relationship is spurious. D. there are at least two independent variables.4. Compute the Pearson correlation for the following data. X Y 3 1 4 5 2 A researcher is interested in seeing if there is a significant relationship between the number of hours of sleep a night (X) and Productivity scores (Y). She conducts a study to test her hypothesis. Please use the data set above. a. Use a two-tailed test with a = .05. Conduct the four steps for hypothesis testing and label each step: Stepl, Step 2, Step 3, and Step 4. b. Write a sentence regarding your results. c. Calculate the regression equation for this data set. d. What are the predicted Y scores for the following X scores: X=1, X=7, X=10, X-12. 2364nA professor at the University of New Hampshire was interested in evaluating the effect of the unemployment rate on the incarceration rate. Using data from 50 states and the District of Columbia (n = 51), the researcher computed the Pearson’s correlation coefficient between the two variables. The results are presented below. Correlations Incarceration Unemployment Incarceration Pearson Correlation 1 .209 Sig. (2-tailed) .142 N 51 51 Unemployment Pearson Correlation .209 1 Sig. (2-tailed) .142 N 51 51 Question What is the sample? What is the dependent variable? What is the independent variable?
- Compute the Pearson correlation for the following data.X: 2, 3, 6, 4, 5 Y :3, 1, 5, 4, 2 A researcher is interested in seeing if there is a significant relationship between the number of hours of sleep a night (X) and Productivity scores (Y). She conducts a study to test her hypothesis. Please use the data set above. Use a two-tailed test with a = 0.1. Conduct the four steps for hypothesis testing and label each step: Step1, Step 2, Step 3, and Step 4.you are given the following information about x and y. xi independebt varible yi dependent varible 4 12 6 3 2 7 4 6 The sample correlation coefficient equals _____.4 A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAs. The results of the survey are shown below. Lovers 4 8 3 7 0 6 5 6 GPA 2.7 2.3 3.4 2.4 3.5 2.9 2.7 2.8 Find the correlation coefficient: r=r= Round to 2 decimal places. The null and alternative hypotheses for correlation are:H0:H0: ? μ r ρ == 0H1:H1: ? ρ r μ ≠≠ 0 The p-value is: (Round to four decimal places) Use a level of significance of α=0.05α=0.05 to state the conclusion of the hypothesis test in the context of the study. There is statistically insignificant evidence to conclude that there is a correlation between the number of lovers students have had in their lifetimes and their GPA. Thus, the use of the regression line is not appropriate. There is statistically insignificant evidence to conclude that a student who has had more lovers will have a lower GPA than a student who has had fewer lovers. There is statistically…
- A professor at the University of New Hampshire was interested in evaluating the effect of the unemployment rate on the incarceration rate. Using data from 50 states and the District of Columbia (n = 51), the researcher computed the Pearson’s correlation coefficient between the two variables. The results are presented below. Correlations Incarceration Unemployment Incarceration Pearson Correlation 1 .209 Sig. (2-tailed) .142 N 51 51 Unemployment Pearson Correlation .209 1 Sig. (2-tailed) .142 N 51 51 Using an alpha level of 0.05 and the four steps of the hypothesis testing process, test the research hypotheses that unemployment increases incarceration. Step 3 Step 4 Based on your decision to step 4 what type of error might you be making?2A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAS. The results of the survey are shown below. Lovers GPA 6 3 4 4 7 6 2.2 2.2 2.3 2 2 3.4 3.8 1.9 2.3 a. Find the correlation coefficient: r= Round to 2 decimal places. b. The null and alternative hypotheses for correlation are: Ho: Hj: ?v + 0 = 0 The p-value is: (Round to four decimal places) c. Use a level of significance of a = 0.05 to state the conclusion of the hypothesis test in the context of the study. O There is statistically insignificant evidence to conclude that a student who has had more lovers will have a lower GPA than a student who has had fewer lovers. There is statistically significant evidence to conclude that a student who has had more lovers will have a lower GPA than a student who has had fewer lovers. O There is statistically significant evidence to conclude that there is a correlation between the number of lovers students have had in…
- The scatterplot below shows the relationship between two random variables X and Y. (a) Is the correlation a good metric for describing the relationship between X and Y for these data? Why or why not? Regardless of your answer suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means. (b) If, as noted in (a), r = -0.15 then what is the value of the correlation between 2X and 5Y? (c) Based on (b) draw your best approximation to the least squares regression line that fits the data above. Also, make a rough sketch of the corresponding residual plot.A random sample of ten professional athletes produced the following data. The first row is the number of endorsements the athlete has and the second row is the amount of money made (in millions of dollars) by the athlete. Is the linear correlation coefficient significant? Set up the appropriate hypothesis to test the significance. Number of Endorsements 0 3 2 1 5 5 4 3 0 4 Profit (in Millions) 2 8 7 3 13 12 9 9 3 10 Group of answer choices H0: r = 0 and Ha: r ≠ 0 H0: r ≠ 0 and Ha: r = 0 H0: ρ = 0 and Ha: ρ ≠ 0 H0: ρ ≠ 0 and Ha: ρ = 0Let x be the average number of employees in a group health insurance plan, and let y be theaverage administrative cost as a percentage of claims. The following data is based on a randomsample:x 5 7 15 25 35y 40 35 30 20 25a. Plot a scatter diagram of the above data.b. Estimate the sample correlation coefficient r as positive, zero, or negative.c. Interpret your results from parts a. and b.
