Contracts for two construction jobs are randomly assigned to one or more of three firms, A, B, and C. Let Y, denote the number of contracts assigned to firm A and Y, the number of contracts assigned to firmB. Recall that each firm can receive 0, 1, or 2 contracts.The joint distribution of Y,, the number of contracts awarded to firm A, and Y,, the number of contracts awarded to firm B, is given by the entries in the following table.Y212211(a) Find the marginal probability distribution of Y,.Y2Marginal Probability

The joint distribution is: Y1 Y2 0 1 2 Total 0 1/9 2/9 1/9 4/9 1…

Answered: Contracts for two construction jobs are…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Mariah Jacobsen is the marketing manager at ABC Electronics, a major consumer electronics supplier in the northwest. Over the last five years, sales of the company's flagship product - the Wizer Anonymizer (the WA) - have been 45000, 45500, 44500, 46000 and 44000 units. This rate of sales is considered average for the product over the last twenty years or so. Ms. Jacobsen believes that the distribution of the WA's sales is normal with a standard deviation of 1500 units. If she were asked to make a forecast of next year's sales to upper management, what is the likelihood that she would be correct if she predicts sales between 43000 and 46000?
The following frequency distribution represents the number of shoes owned by college students. Use the table to answer the following questions. # of shoes 2-7 8-13 14 - 19 20-25 26-31 32 - 37 a) The class width is b) Thef is equal to f 3 5 8 22 35 28 c) The relative frequency for the class 26-31 is to 2 decimals) d) The class bounds for the fourth class are: (express as a percent rounded e) Find the mean number of shoes owned by college students: decimal place) e) How would you describe the shape of the distribution? (normal, skewed right, or skewed left) (round to 1
The distribution of number of stores according to size in 3 areas is given in the following table: AREA L M S P 50 50 75 150 105 260 R 20 130 150 Discuss about the possibilities of the following: i) P (M) ii) P (LOM) iii) P (MUS) iv) Are L and S dependent? v) Are M and L independent?
Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consist of 26 couples. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of 26 births. The value of the mean is μ = (Type an integer or a decimal. Do not round.). The value of the standard deviation is o= 0 (Round to one decimal place as needed) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of girls or fewer are significantly low. tion Viewer (Round to one decimal place as needed.) Values of airls or areater are significantly high.
Erron got a new job in a shoe store at Robinson's Calasiao, Pangasinan. The numbers of pair of shoes he was able to sell for three days are: 2,4,5. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a.) List down the 9 different possible samples. b.) Find the mean of each sample. c.) Find the mean of the sampling distribution of means. d.) Identify the probability of each sample. e.) Find the population mean. f.) Compare the population mean with the mean of the sampling distribution of means.
The figure above shows three different panels examining the relationship between average price and type of avocado.a)Compare the distributions of the average prices for the conventional and organic avocados. In particular, compare their central locations, spreads and skew to conclude whether there is evidence in this data that the average prices of organic avocados is different from those of conventional avocados.
Q2. Determine True or False for the following statements: A) Nominal data is the highest form of data level hierarchy. (T or F) B) Interval data has a real zero. (T or F) C) Systematic sampling is the type of statistics sampling techniques. (T or F)
4. The marks distribution of 100 students of a college is as follows. Marks 10-20 20-40 40-70 70-90 90-100 No of students a) Find the highest mark of the weakest 30% of the students. b) Find the lowest mark of top 40% of the students. c) Find the limits and range of marks of middle 50% of students 15 20 30 20 15
a) choose one Class A Class B Both had the same median b)choose one Class A Class B Both had the same IQR c)choose one Class A Class B both had the highest score d) choose one Class A Class B both had the same range
use. Do a conclusion about thiS 20.5 "reference" drugs that they imitate. One aspect in which ance times (second received the generic drug first, followed by the reference signed at random to the subjects. Subjects 1 through 10 matched pairs design. Numbers 1 through 20 were as- TABLE 20.5 Absorption extent for two drug first, followed by the generic drug. In all 20.50 Comparing two drugs. Makers of generic drugs must ght-hand and left. reads chow that they do not differ significantly from the Astep "reference" drugs that they imitate. One aspect in which Arugs might differ is their extent of absorption in the klood. Table 20.5 gives data taken from 20 healthy non- smoking male subjects tor one pair of drugs." This is a matched pairs design. Numbers 1 through 20 were as- signed at random to the subjects. Subjects 1 through 10 20. Subject Thread Th Right drug. Subjects 11 through 20 received the reference drug first, followed by the generic drug. In all cases, a washout period separated…
There are four blood types, and not all are equally likely to be in blood banks. In a certain blood bank, 49% of donations are type O blood, 27% of donations are type A blood, 20% of donations are type B blood, and 4% of donations are type AB blood. A blood bank wants to know how many donations will be required, on average, to achieve at least one of each of the blood types. Is it appropriate to use the geometric distribution to calculate probabilities in this situation? A) Yes, the geometric distribution is appropriate. B) No, since each trial is not independent of the other trials. C) No, because it is not looking for the first occurrence of success. D) No, since a success and failure on each trial cannot be defined.

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