If the variance of x is 4 then the variance of 3 + 5x is (a) 100 (b) 103 (c) 20 (d) 23

What is the variance of this set: {x, x+1, x+5, x+2}​

Find the variance(2 decimal).

Explain the variance of the sum or difference of the two variables X and Y ?

The cost of a week long vacation in a city has a mean of 1000 and a variance of 1200. The city imposes a tax which will raise all tourism related costs by 10%. Find the coefficient of variation for the cost of a week long vacation in this city after the tax is imposed.

Find the variance of x or the number of cups of coffee. (Do not round intermediate steps but round your final answer to 4 decimal places)

QUESTION 1 A supermarket has two customers waiting for their purchases at counter 1 and one customer waiting to pay at counter 2. Let X1 and X2 denote the numbers of customers who spend more than RM50 on groceries at the respective counter. Suppose that X1 and X2 are independent binomial random variables, with the probability that a customer at counter I will spend more than RM50 equal to 0.2 and the probability that a customer at counter 2 will spend more than RM50 equal to 0.3.

The variance is sometimes a negative number.

Lambda can be used for any size table and measures the variance explained but not the direction. True False

Suppose the variance of X is 95. What is the variance of .09X?