STATISTICS AND PROBABILITY QUESTION:
Homework Answers
a)
number of ways =9C4 =126
b)
P(three are desktops)=5C3*4C1/9C4 = 0.3175
option C
c)P(at least 3) =P(X=3)+P(X=4)=5C3*4C1/9C4 +5C44C0/9C4 =0.3571
option E
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STATISTICS AND PROBABILITY QUESTION:
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Please be as clear as possible. Textbook - Applied Statistics and Probability for Engineers by Montgomery,...
Please be as clear as possible.
Textbook - Applied Statistics and Probability for Engineers by
Montgomery, 6th Edition
In a hybrid truss structure, made of steel and wood elements, we want to check their stress state. Elements can be either in compression or in tension. By observing the truss, one finds that: • 65% of the elements are in compression. • 30% of the elements in compression are in steel. • 60% of the elements in tension are in steel....
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Probability and statistics for engineers
O d. 25% Question 13 Given the following data 12, 15, 17, x, 20, 22, and their mean is 17. Find the value of x Not yet answered Marked out of 2 O a. 15 P Flag question O b. 16 Oc.17 O d. 18.5 Cette 14 A sample consists of four observations: (1,3,5,7). What is the dard deviation?
3)/n a computer store, 30% of the computers in stock are laptops and 70% are desktops. Five percent of the laptops are on sale, while 10% of the desktops are on sale. a) Define b) Use EITHER a tree diagram or a hypothetical two-way table to represent this situation. Calculate the probability of that a randomly selected computer will be a desktop, given that the computeris on sale. Use proper notation for it. c) d) Explain what that probability means
e d of the computer sales in a country. Acampus bookstores bon types of computers and relat the year 0% of desktops que service, while or laptop have proberengservice comprese part Laptop computers have been growing in popularly according to a recent study. Laptops now represent more laptops and 41% des dos Rebity rates for the two types of machines are quite diferent, however s Sketch a probably tree for this Laptop Requires service Does not require service Desktop Hoges...
2. A committee will be formed with two managers and four engineers selected randomly without replacement from nine managers and 18 engineers. (a) How many different committees are possible? (2 pts) b) What is the probability that the specific engineer Pat and the specific manager Chris are on the committee? (2 pts) c) What is the probability that specific engineer Pat or specific manager Chris are on the committee? (2 pts) (d) Each of the engineers differ in years of...
Probability and statistics for engineers
Question 7 Not yet answered The chance that a certain old bridge will fail is 0.002. A new bridge will cost 50000 (fifty thousands) JD. If losses for the bridge failure will amount to 5 million, determine whether the new bridge should be built. Marked out of 2 P Flag question O a. No, need to build new bridge O b. Yes, there is a need to build new bridge O c. We need more...
Probability and statistics for engineers
d. 18.5 Question 14 A sample consists of four observations: {1, 3, 5, 7). What is the standard deviation? Not yet answered Marked out of 2 O a. 6.67 P Flag question O b. 6 O c. 2.58 O d. 2.44 Qwesten 15 [ 0(1-x² - 1<x<1 the following p.df. f(x) = otherwise
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Question 4 If P(A) = 0.5, and P(B) = 0.2, then the P(A N B)= Not yet answered O a.0.7 Marked out of 2 O b. 0.3 P Flag question O c.0.1 O d. Cannot determine from the given information.
Please be as clear as possible.
Textbook - Applied Statistics and Probability for Engineers by
Montgomery, 6th Edition
In a hybrid truss structure, made of steel and wood elements, we want to check their stress state. Elements can be either in compression or in tension. By observing the truss, one finds that: • 65% of the elements are in compression. • 30% of the elements in compression are in steel. • 60% of the elements in tension are in steel....
Probability and statistics for engineers
O d. 25% Question 13 Given the following data 12, 15, 17, x, 20, 22, and their mean is 17. Find the value of x Not yet answered Marked out of 2 O a. 15 P Flag question O b. 16 Oc.17 O d. 18.5 Cette 14 A sample consists of four observations: (1,3,5,7). What is the dard deviation?
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