21.The standard deviation the
b.square root of the sum of : 1329668
21.The standard deviation is the
b.square root of the sum of the deviations from the mean
c.same as the expected value
d.positive square root of the variance
22.x is a random variable with the probability function: f(x) ? x/6 for x ? 1,2 or 3. The expected value of x is
The following represents the probability distribution for the daily demand of microcomputers at a local store.
23.Refer to Exhibit 5-1. The expected daily demand is
24.Refer to Exhibit 5-1. The probability of having a demand for at least two microcomputers is
The probability distribution for the daily sales at Michael's Co. is given below.
Daily Sales ($1,000s)Probability
25.Refer to Exhibit 5-2. The expected daily sales are
26.Refer to Exhibit 5-2. The probability of having sales of at least $50,000 is
The probability distribution for the number of goals the Lions soccer team makes per game is given below.
Number of GoalsProbability
27.Refer to Exhibit 5-3. The expected number of goals per game is
28.Refer to Exhibit 5-3. What is the probability that in a given game the Lions will score at least 1 goal?
29.Refer to Exhibit 5-3. What is the probability that in a given game the Lions will score less than 3 goals?
30.Refer to Exhibit 5-3. What is the probability that in a given game the Lions will score no goals?
d.None of the answers is correct.
A local bottling company has determined the number of machine breakdowns per month and their respective probabilities as shown below.