X = number of books Probability 1 0.05 2 0.10 3 0.20 4 0.35 5 0.10...
Find the mean of the following probability distribution? 1 0.20 2 0.10 3 0.35 4 0.05 5 0.30 Place your answer, rounded to two decimal places, in the blank. When entering your answer do not use any labels or symbols other than a decimal point. Simply provide the numerical value. For example, 1.23 would be a legitimate entry
You are given the probability distribution below: x 0 1 2 3 4 p(x) 0.05 0.35 0.25 0.20 0.15 Determine the standard deviation of X. Report your answer to three decimal places.
For the following probability distribution x fx) 0 0.01 0.02 0.10 0.35 4 0.20 0.18 0.06 0.05 0.09 0.03 0.10 Upload a file detailing all of the work needed for these questions. a. b. c. Determine E(x). (2 points) Determine the variance. (2 points) Determine the standard deviation. (1 point)
Need to show work 10. Let X -number of books purchased by students at your school during a given academic term. The probability distribution for X is given in the following table. X- number of books2 3 4 5 67 Probability 0.05 0.10 020 035 0.10 0.15 0.05 (a) A student is randomly chosen from the student population. What is the probability that the student purchased five or more books during the current academic term? Answer: 0.3 (b) What is...
4. Assume that the joint pmf of (X,Y) is 0.20 0.10 0.05 0.25 0.10 Find (1) a: (2) P(XYs1): (3) the marginal distributions. Mark
Consider the probability distribution shown below. x 0 1 2 P(x) 0.75 0.20 0.05 Compute the expected value of the distribution. 0.3 Compute the standard deviation of the distribution. (Round your answer to four decimal places.)
Suppose Microeconomic Principles and Macroeconomic Principles both have two recommended text- books. The bivariate distribution of the number of micro and macro textbooks actually purchased by economics students is: Micro, X Macro, Y X=0 X=1 X = 2 Y = 0 0.15 0.15 0.05 Y =1 0 .15 0.10 0.05 Y = 200.050.30 à. Find the marginal distributions for the number of micro and macro textbooks purchased for each student b. Compute E(X). E(Y), Var(X), Var(Y), and Cov(X,Y). c. Compute...
4. The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distribution 6 0.03 7 0.08 8 0.15 9 0.20 10 0.19 11 0.16 12 010 13 0.07 14 002 Find the probability that no more than ten days will be lost next summer. Find the probability that from 8 to 12 days will be lost next summer Find the probability that no days at all will be...
Using the joint probability table below, determine P(X=0 [Y=5). 3 х 10 0.05 0.15 0.05 1 10.15 0.3 0.15 Y 1 0 0.05 0.1 5 7 a. 0.75 b.0.35 C. 0.15 d. 0.03 e. 0.3
Ellen is taking 4 courses for the semester. She believes that the probability mass function for X = the number of courses for which she will get an A grade is given below. k 0 1 2 3 4 ?(? = ?) 0.10 ? 0.40 0.15 0.05 a) What is the probability that Ellen gets at least 2 A’s? (Write the probability sentence related) (3pts) b) Complete the cumulative distribution function (cdf): (5pts) k 0 1 2 3 4 ?(?...