An urn contains 4 white balls and 6 red balls. A second urn
contains 8 white balls and 2 red balls. An urn is selected, and a
ball is randomly drawn from the selected urn. The probability of
selecting the first urn is 0.7. If the ball is white, find the
probability that the second urn was selected. (Round your answer to
three decimal places.)
In: Statistics and Probability
| A. |
0.4 |
|
| B. |
0.5 |
|
| C. |
0.6 |
|
| D. |
0.7 |
In: Statistics and Probability
3. John is proofreading his own essay. From the past experience, he knows that the probability that any page contains at least one typo is equal to 0.7. The essay he is reading now is 20 pages long. What is the probability that this essay has no more than 15 typos? Assume Poisson distribution of the typos number in John’s essays.
In: Statistics and Probability
Suppose that the service life, in yours, of the "LOUD WHISPER", a hearing aid battery, is a random variable having a Weibull distribution with the Scale parameter = 0.7 and the Shape parameter = 2.1.
a) What is the hazard rate at the second year of operation?
b) What is the probability that the battery will fail between the first and third year?
c) At what point in time, 30% of the batteries have died?
In: Statistics and Probability
You have two coins, one of which you know to be fair and the other of which has a probability of turning up heads of 0.7, but you can’t tell which one is which. You choose one coin at random and flip it ten times getting an equal number of heads and tails. What is the probability that you chose the unfair coin?
In: Statistics and Probability
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 150 engines and the mean pressure was 4.0 pounds/square inch (psi). Assume the population standard deviation is 0.7 . If the valve was designed to produce a mean pressure of 4.1 psi, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications? is there sufficient or not sufficient evidence?
In: Math
1. Design a simply supported slab resting on masonry walls of
thickness 250mm
each with its opposite edges supported (L = 4.75m). Take concrete
grade
32MPa; steel grade 500N; permanent load (G) = 1.5kPa; imposed load
(Q) =
2kPa; ψs = 0.7 & ψl
= 0.4; γconc = 25kN/m3
; ∆=span/500 (HOMEWORK)
In: Civil Engineering
Urea was hydrolyzed with an enzyme at a fixed concentration of 50 μM and the following data were obtained. Using Lineweaver-Burk plot determine the kinetic parameters.
|
Urea(mM) |
0.10 |
0.20 |
0.30 |
0.40 |
0.50 |
0.60 |
0.7 |
0.80 |
0.90 |
1.00 |
|
Rate(mMs-1) |
6.25 |
12.5 |
18.8 |
25.0 |
31.2 |
37.5 |
43.7 |
50.0 |
56.2 |
62.5 |
In: Other
At an intersection, a car is driving through a turn with an effective radius 64 ft. The coefficients of kinetic and static friction are 0.4 and 0.7, respectively. Derive an expression for the maximum speed at which the car can drive through this turn.
The set up Newton's Law and find the answer. Eventually evaluate your answer.
Below answer with the speed in mph (use mph as units).
In: Physics
Use a general supply and demand model to explain the following: Several hotel-resorts have opened in the past decade in Las Vegas. The Bellagio has world-class art and the Paris LV is a recreation of Paris (without the rude French people). These and other new hotels have increased the supply of rooms in Las Vegas by 25%, however, room rates have doubled over the same time. How is this possible?
In: Economics