Consider n independent rolls of a k-sided fair die with k 2: the sides of the die are labelled 1,2,..., k, and each side has probability 1/k. Let the random variable X, denote the number of rolls that result in side i. Thus, the random vector (X1,.. .. Xk) has a multinomial distribution. 1. Which of the following statements is correct?

Try to answer without doing any calculations

a. X1 and X2 are uncorrelated.
b. X1 and X2 are positively correlated
c. X and X2 are negatively correlated.

Is every rectangle is a parallelogram? true false

What is the standard form of -5x^2+2x^4-11+x^3+3x

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius