The random variable X, representing the number of items sold in a week, has the following probability distribution:Which of the three random variables has the smallest standard deviation? X Y Z All three random variables have the same standard deviation.

The following three histograms represent the probability distributions of the three random variables X, Y, and Z.Which of the three random variables has the largest standard deviation? X Y Z All three random variables have the same standard deviation.

The random variable X, representing the number of items sold in a week, has the following probability distribution:x 0 1 2 3 4 5 6P(X = x) 0.10 0.20 0.40 0.15 0.05 0.05 0.05By the fourth day of a particular week, 3 items have already sold. What is the probability that there will be less than a total of 5 items sold during that week? 1.00 0.95 0.90 0.85 0.67

The random variable X, representing the number of items sold in a week, has the following probability distribution:x 0 1 2 3 4 5 6P(X = x) 0.10 0.20 0.40 0.15 0.05 0.05 0.05On average, how many items are sold in a week? 6.3 3.0 2.2 2.0 0.1428

The random variable X, representing the number of items sold in a week, has the following probability distribution:x 0 1 2 3 4 5 6P(X = x) 0.10 0.20 0.40 0.15 0.05 0.05 0.05What is the probability that in a given week there will be at most 4 items sold? 0.60 1.00 0.10 0.85 0.90

Three random variables, U, V, W have distributions as shown in the graphs below.Which one of the three random variables has the largest standard deviation?Group of answer choicesVUAll three random variables have the same standard deviation.W