Answer to Question #83307 in Statistics and Probability for ADEKUNLE OKUNADE

Question

No. 1: The table below gives the distribution of heights of 1000 yam tubers at Mile 12 market of Ketu, Lagos.
Height (x) 156-160 161-163 164-166 167-169 170-175
Total No. of yams (f) 160 140 360 210 130


Using Assumed mean method, correct to two decimal places compute mean yam height;
Compute the Variance and Standard deviation ;
Obtain the coefficient of variation .


No. 2: A bowl contains 6 Black and 4 Yellow balls. Two balls are drawn without replacement. Find the probability that (a) the selection is Yellow; (b) both are of the same colour; (c) both are of different colour.












No. 3: A random variable X is given as shown below. Find Var(X)
Y -2 0 2 4
P(x) 1/3 1/6 1/6 1/3