Q2/A group of students was tested in pasketball and they got a set of grades, and after a week's interval, the test was repeated and they got new grades. t is required to find the strength of the relationship if you know that the cabular value is below the significance evel (0.05) and the degree of freedom of 2-n is 0.765-7, 0.432 = 9. 0.655 = 8 %3D %3D
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- Find kurtosis by using ungroup data given in the picture using quartile deviation, make sure to arrange data before solving question.The least-squares regression equation is y=784.6x+12,431 where y is the median income and x is the percentage of 25 years and older with at least a bachelor's degree in the region. The scatter diagram indicates a linear relation between the two variables with a correlation coefficient of 0.7962. Interpret the slope.The correlation between the two variables of interest is 0.81, which is significant at the 0.0337 level. This means ______. Group of answer choices 1.that the null hypothesis is rejected 2.the research hypothesis is rejected 3.that the null hypothesis is accepted 4.that the null hypothesis cannot be determined
- Which of the non-parametric test for ordinal data is the best to use in the given scenario? An experiment was conducted to compare the strengths of two types of elastic bandages: one a standard bandage of a specified weight and the other the same standard but treated with a chemical substance. Ten pieces of each were randomly selected from production. Does the treated bandage tend to be stronger than the standard? Table 1. Strength measurements (and their ranks) for 2 types of bandages. STANDARD TREATED 1.21(2) 1.49(15) 1.43(12) 1.37(7.5) 1.35(6) 1.67(20) 1.51(17) 1.50(16) 1.39(9) 1.31(5) 1.17(1) 1.29(3.5) 1.48(14) 1.52(18) 1.42(11) 1.37(7.5) 1.29(3.5) 1.44(13) 1.4(10) 1.53(19) a. Mood median test b. sign test c. Wilcoxon rank-sum test d. Wilcoxon matched-pairs signed-ranks test e. Spearman and Kendall correlation coefficients f. Kruskal-Wallis testThe data in the table below presents the hourly quantity of production for three lines of production processes over the first 4 days in XYZ Company. Answer the questions based on the Excel Output given in the image. a. State the null and alternative hypothesis for single factor ANOVA. b. State the decision rule (α = 0.05).c. Calculate the test statistic and make a decision.A researcher finds a correlation of r x y = + 0.40 with a sample of n = 25 bi-variate observations. Given a null hypothesis of H0: ρ x y = 0 and α = 0.05 , the researcher should: cant tell from the information given reject the null hypothesis fail to reject the null hypothesis
- The least-squares regression equation is y=784.6x+12,431 where y is the median income and x is the percentage of 25 years and older with at least a bachelor's degree in the region. The scatter diagram indicates a linear relation between the two variables with a correlation coefficient of 0.7962. Predict the median income of a region in which 25% of adults 25 years and older have at least a bachelor's degree.Suppose you are interested in the percentage of students who had burrito for lunch in your statistics class. There are a total of 120 students in your class. Instead of asking each student whether they had burrito for lunch, you randomly picked 36 students from the class and found that 11 students had burrito for lunch. Calculate a single value to estimate the parameter of interestA chi square test tells us: a. Whether two continuous variables are correlated with each other. b. Whether two discrete variables are independent of each other c. The amount of variation in one variable explained by the other d. Which categories of one variable are associated with which categories of the other variable
- A homeopathic drug company developed a new drug designed to prevent colds. The company claims there is no difference between the effectiveness for men and women. To test the claim they chose a simple random sample of 100 women and 150 men who participated in the trial.At the end of the study, 56% of the women caught a cold, and 40% of the men caught a cold. Based on these findings we are testing to see if there is a difference in the effectiveness for women and men.a) Define the parameter(s) of interest.b) State the Hypotheses.c) Find the value of the relevant sample statistic using correct notation:_________________________ Based on the randomization distribution below, what is the p-value ____________________Some companies "grade on a bell curve" to compare the performance of their managers and professional workers. This forces the use of some low performance ratings so that not all workers are listed as "above average." Ford Motor Company's "performance management process" for this year assigned 10%10% A grades, 80%80% B grades, and 10%10% C grades to the company's managers. Suppose Ford's performance scores really are Normally distributed. This year, managers with scores less than 2525 received C grades and those with scores of at least 475475 received A grades. What is the mean of the scores? (Enter your answer as a whole number.) mean: What is the standard deviation of the scores? (Enter your answer rounded to one decimal place.) standard deviation:A new bandage has been developed that is thought to aid in the healing of small cuts. The bandage has special air circulation holes as well as antiseptic within the bandage pad. Controlled one centimeter cuts in volunteers were completely healed in an average of 11 days utilizing the old bandage. Below are the healing times for similar cuts utilizing the new bandage. Did the new bandage significantly reduce healing times? Analyze both parametrically and nonparametrically (with both the sign test and Wilcoxon signed-rank test). 9.5, 9.7,10.5, 10.2, 10.8, 10.9, 10.1, 11.3, 9.9, 9.6, 11.2, 11.0, 10.0, 10.4, 11.4, 9.8
