The discrete random variable X is the number of students that show up for Professor Smith's...
The discrete random variable X is the number of passengers waiting at a bus stop. The table below shows the probability distribution for X. What is the expected value E(X) for this distribution? X 0 1 2 3 Total P(X) .40 .30 .20 .10 1.00 1.1 1.0 1.7 1.9
Z table.pdf Question 6 4 pts X is a discrete random variable that represents the number of student emails that a professor receives in any given day. The probability distribution for X is summarized in the table below: PIX = x) Calculate the mean of X. Provide a numeric value rounded to two decimal places. Previous Next
The table below shows the probability distribution of a discrete random variable X. Values of the random variable X (x) Probability of observing each value of X P(X = x) 6 0.20 7 0.25 8 0.25 9 0.10 10 0.12 11 0.08 Total 1.00 (a) Determine the probability that the random variable X is between 8 and 10, inclusive. (1 mark (b) Determine the probability that the random variable X is at least 9. (1 mark) c. Determine the probability...
The table bbw shows a probability density function for a discrete random arabe X. the number of coffee cups an employee brews at an office coffee maschine per day. What is the probability that X is 1? X PIX 0 1/8 13/16 2 3/8 31/16 4 1/8 5 1/8
Question B2 (a) The table below shows the discrete probability distribution of a random variable X: X P(X) 1 0. 2 7 18 W Tk 25 0.1 Suppose u = 12. Find the values of w and k. Hence, find the variance. (5 marks) (b) Suppose 15 students in a class are to be assigned randomly into 5 groups for group presentation. Each group contains 3 students. In how many different ways can these groups be formed? (3 marks) Suppose...
The price to earnings ratio (P/E) is an important tool in financial work. A random sample of 14 large U.S. banks (J. P. Morgan, Bank of America, and others) gave the following P/E ratios.† 24 16 22 14 12 13 17 22 15 19 23 13 11 18 The sample mean is x ≈ 17.1. Generally speaking, a low P/E ratio indicates a "value" or bargain stock. Suppose a recent copy of a magazine indicated that the P/E ratio of...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...