Instructions

For the following questions answer them individually

Question 141

The mean of 6 observations is calculated as 24 and later it was noted that one of the observations is wrongly taken as 24 intstead of -24 then the correct mean is

Question 142

The median of 15 observations is 32 .Each of the obeseravation is greater than the median are increased by 8 and each of the observations leaas than the median are decreased by 6 Then the median of new data is

Question 145

If the standard deviation of a variable x is 12 then the variance of the variable 2x + 17 is

Question 147

When two unbiased dice are thrown , the probability that they show up different numbers is

Question 148

In a bivariate distribution $$X_i, y_i, i = 1, 2, ....., 8$$, if $$d_i$$ is the deviation between the the ranks of $$X_i$$ and $$Y_i$$ and and $$\sum_{i = 1}^{8} d_i^{2} = 21$$ then the coeffefficient of rank correlation between $$X_i$$ and $$Y_i$$ is

Question 149

If 5 boys and 4 girls sit in a row at random then the probability the boys and girls sit alternatively is

Question 150

When a leap year is selected at random then the probability that it has exactly 52 Sundays is

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