With solution please, thank you. Subject: Statistics and Probability

1. What is the probability that two Heads will occur in tossing a fair coin thrice? A. 1/2 C. D. 2. Which is NOT true about the probability of all the values of a discrete rando variable? A. The probability of each value must be between 0 and 1 B. The sum of the probabilities is equal to 1 C. The probability of the value could be zero D. The value of a random variable could be zero 3. Which is used to describe the amount of spread, dispersion, or variability of the items in a distribution? A. Mean B. Variance C. Standard Deviation D. Variance and Standard Deviation 4. What is the first step in finding the variance of a discrete probability distribution A. Calculate the standard deviation B. Find the mean of the probability distribution C. Subtract the mean from each value of the random variable X D. Multiply the square of the difference of X and the mean by each value of the random variable. 5. Which is NOT a possible value of a random variable, if two coins are tossed? A. 0 B. 1 C. 2 D. 3 6. What are the possible values of X to be a probability distribution if P(X) = ? A. 0, 2, 3 B. 1, 2, 3 C. 2, 3, 4 D. 1, 1, 2