(5) 2. Let X be the number of packages being mailed by a randomly selected customer at a certain ...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. * 1 p(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X 1 1. 5 2 3.5 PC) 04 125 x 16 X (b) Refer to part...
5. -/1 points DevoreStat9 5.E.041. My Notes Ask Your Teacher Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 2 3 4 p(x) 0.2 0.4 0.1 0.3 (a) Consider a random sample of size n = 2 (two customers), and let be the sample mean number of packages shipped. Obtain the probability distribution of x 1 1.5 2 2.5 3 3.5...
Let x be the number of courses for which a randomly selected student at a certain university is registered. The probability distribution of x appears in the table shown below: x 1 2 3 4 5 6 7 p(x) .03 .05 .09 .26 .39 .14 .04 (a) What is P(x = 4)? P(x = 4) = (b) What is P(x ≤ 4)? P(x ≤ 4) = (c) What is the probability that the selected student is taking at most five...
A sample of 100 clients of an exercise facility was selected. Let X = the number of days per week that a randomly selected client uses the exercise facility. X Frequency 0 2 1 14 2 32 3 29 4 10 5 9 6 4 Find the number that is 1.5 standard deviations BELOW the mean. (Round your answer to three decimal places.)
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a gas station Suppose that the mean value and standard deviation of X are 11.5 and 4.0, respect viely. a. In a sample of 50 randomly selected customers, what is the approximate probability that the sample mean amount purchase is at least 12 gallons? b. In a sample of 50 randomly selected customers, what is the probability that the total amount of gasoline purchase is...
A stockroom currently has 30 components of a certain type, of which 8 were provided by supplier 1, 10 by supplier 2, and 12 by supplier 3. Six of these are to be randomly selected for a particular assembly. Let X= the number of supplier 1's components selected, Y= the number of supplier 2's components selected, and p(x, y) denote the joint pmf of X and Y.a. What is p(3, 2)? [Hint: Each sample of size 6 is equally likely...
Let X be the number of flaws on the surface of a randomly selected boiler of a certain type and suppose X is a Poisson distributed random variable with parameter u- 5. Find P(4 sX s 6) a 0.5521 b)0.1462 c) 0.7228 d0.4971 e)0.5028 f None of the above
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 5 3 6 4 13 5 13 6 1 A. Find the sample mean x. (Round your answer to two decimal places.) B. Find the sample standard deviation, s. (Round your answer to two decimal places.) C. Complete the columns of the chart. (Round your answers...