If there is a strong correlation between the variables a and b, b must cause a. O A. True B. False
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- Which of the following correlations represents the strongest association between two variables: Group of answer choices A).50 B)-.20 C).00 D)-.85Q.5: Mr. Hamood, a research scholar of Business Department in HCT, would like to find out the association between the mid-term marks, quiz marks, assignment marks and end semester marks with the Total Marks/GP obtained by the students in the final exam. He has decided t collect the data from the college students studying in the Sultanate of Oman. He came to know that there are more than 138,000 students studying in all the different colleges in Oman and realized that it is not possible to collect the data from all the students considering the time to complete the study. a) How will you decide the sample size? Discuss with reasons b) Find out the dependent variable and independent variables e) Who are the respondents? d) How will you collect the data? Discuss the instrument and process e) Inferential statistics is applicable. Discuss analyticallyLet u₁, U2, U3, U4, U5 E R and define ū = U1 ՂԱԶ U3 ՂԱՃ U5 and = 2u1 +3 2u2 +3 2u3 +3 2u4 +3 2u5 +3 What is the correlation coefficient between u and ? Justify your answer.
- 10)2. Two fair dice are thrown. Let U be the minimum score of the two dice and let V be the maximum score of the two dice. a. Display f(u,v) in a table. b. Find the covariance and correlation between U and V.6. The coefficient of correlation between x and y is r = 0.59. Calculate the coefficient of determination.
- A health educator wants to evaluate the effect of a dental film on the frequency with which children brush their teeth. Eight randomly chosen kids are measured on the number of times they brushed their teeth for one month before viewing the dental film and again for a month after the film. Child Before After 1 23 27 2 28 29 3 22 25 4 30 30 5 26 25 6 24 28 7 25 28 8 22 24 Therefore, the research hypothesis is that the dental film is effective at changing the frequency with which children brush their teeth. Hint: Make sure you do After-Before. Step 1. Express the substantive question as two statistical hypotheses. H0: Answer Answer Answer H1: Answer Answer Answer Step 2. Draw the sampling distribution under the null hypothesis using the p < .05 as the criterion for statistical significance to determine the critical values. What is the center of the distribution? Answer Answer Answer What are the critical values?…In a certain university the probability of randomly selecting a student that studies mathematics is 0.6 while the probability of randomly selecting a student studying literature is 0.45. Which of the following statements CAN NEVER BE TRUE? I. The probability of selecting a student studying mathematics given that he studies literature is 0. II. The probability of selecting a student that studies both science and mathematics is 0.27. O Both Statements I and Il. O StatementI only. O Neither Statement I not I. O Statement II only.NEED FULLY CORRECT HANDWRITTEN SOLUTION FOR THIS.... ASAP!!! Please be fast, I'll rate positive for sure.
- 1. X and Y are two categorical variables. The best way to determine if there is a relation between them is to a. calculate the correlation between X and Y. b. draw a scatterplot of the X and Y values c. make a two-way table of the X and Y values d. all of the aboveQ No.6) a) The following table shows verbal reasoning test score, x, and an English test score, y, for each of a random sample of 8 children who took both tests. Child B D E F G H 112 113 110 113 112 114 109 113 у 69 65 75 70 70 75 68 76 Calculate the Co-efficient of correlation “r" between the scores in verbal reasoning and English. b) The age (X) and systolic blood pressure (Y) of 100 individuals gave the following sums: ΣΧ - 4421, ΣΥ- 12130 Σ x? = 208349, ΣΥ- - 1498976 ΣΧ.y = 542735 %3D Determine the equation of the least squares regression line of Y on X.56. Which of the following illustrates perfect correlation? a. b. d. C.