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All are the positive aspects of correlation of coefficient other than: (a) reason influence organization can't be proven (b) threat organization will be printed (c) Correlation threat to affliction (d) exhibits linear courting (AIIMS, ninety seven) 17. whilst the peak and weight is completely correlated, coefficient of correlation is: (a) +1 (b) –1 (c) zero (d) greater than 1 (AIIMS, 2000) 18. top to weight is a/an: (a) organization (b) Correlation (c) percentage (d) Index (AIIMS, ninety six) [Hint: organization is the connection among random variables and correlation coefficient indicates the measure of association]. 19. Correlation coefficient has a tendency to lie among: (a) 0 to –1. zero (b) –1. zero to +1. zero (c) +1. zero to 0 (d) +2. zero to –2. 0(AIIMS, June ninety seven) 20. If the correlation among top and weight is two. 6. precise is: (a) optimistic correlation (b) No organization Correlation and Regression seventy one (c) unfavourable correlation (d) Calculation of coefficient is inaccurate (AIIMS, June 2000) 21. In a regression among peak and age stick to y = a + bx. The curve is: (a) Hyperbola (b) Sigmoid (c) directly line (d) Parabola (AIIMS, Nov 2001) 22. The correlation among IMR and socioeconomic prestige is better depicted by way of: (a) Correlation (+1) (b) Correlation (+0. five) (c) Correlation (– 1) (d) Correlation (– zero. eight) (AIIMS, Nov 2001) [Hint: The IMR decreases with the rise in socioeconomic prestige, however it isn't a wonderfully correlated]. 23. The correlation among variables A and B in a research was once came across to be 1. 1. this means: (a) Very powerful correlation (b) reasonably robust correlation (c) vulnerable correlation (d) Computational mistake in calculating correlation (AI, 2002) 24. A heart specialist discovered a hugely major correlation coeffcient (r = zero. ninety, p = zero. 01) among the systolic blood strain valuse and serum ldl cholesterol values of the sufferers attending his sanatorium. Which of the subsequent statements is inaccurate interpretation of the correlation. (a) seeing that there's a excessive correlation the magnitudes of either the measurements usually are with reference to one another. (b) A sufferer with a excessive point of systolic BP is usually prone to have a excessive point of serum ldl cholesterol. seventy two clinical facts and Demography Made effortless (c) A sufferer with a low point of systolic BP can be more likely to have a low point of serum ldl cholesterol. (d) approximately eighty% of the adaptation in systolic blood strain between his sufferers may be defined by way of their serum ldl cholesterol values and vice versa. (AI, 2005) 25. overall ldl cholesterol point = a + b (calorific consumption) + c (physical task) + d (body mass index); is an instance of: (a) easy linear regression (b) easy curvilinear regression (c) a number of linear regression (d) a number of logistic regression (AI, 2005) Chapter 6 likelihood 74 clinical records and Demography Made effortless Random sequence: If a coin is tossed very huge variety of occasions, and the results of each one toss is written down, the end result will be whatever just like the following (H status for heads and T for tails): H, H, T, T, T, H, T, H, H, H, T, T, H, H, T, H, .......................