Answer to Question #85582 in Statistics and Probability for Anand

Question

1.a) In a partially destroyed laboratory, record of an analysis of correlation of data,
only the following results are legible:
Variance of X = 9
Regression equations are
(i) 8x −10y + 66 = 0
(ii) 0 40x −18y − 214 =
Find out the following missing results.
(i) The means of X and Y
(ii) The coefficient of correlation between x and y
(iii) The standard deviation of Y

1.b) A random sample of 10 males from a normal population showed a mean height 66
inches and the sum of squares from this mean is equal to 90 sq inches. Is it
reasonable to believe that the average height is greater than 64 inches? Justify
your answer

Answer 1

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