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Then a ball is chosen from that urn. Urn 1 contains 1 white balls and 3 red balls. urn 2 contains 2 white and 2 red. If a white ball is drawn what is the probability that is came from urn 2?
A property manager thinks that the average rent for one-bed room flat his city has gone up to AED 6000 per month. He took a sample of 60 flats and found out that the sample mean was AED 6015 and sa
Construct a 95% confidence interval for the mean and provide a description of the meaning of the confidence interval.
How many different eight-note melodies within a single octave can be written if the black keys and white keys need to alternate?
The probability of two or more events occurring concurrently is called a
What is the probability that a salesperson selected at random will have an excellent potential for advancement given they also have average sales ability?
A box contains 3 red balls, 4 white balls, and 3 green balls, 2 balls a taken without replacement. What is the probability that they are the same color?
When an event's probability depends on the likelihood of another event, the probability is a
Question: Suppose that you observe the following service times (in minutes) by a bank teller: 1, 2, 1, 7, 2, 4. a. What is the mean service time?
A student received an ""A"" on the first test of the semester. The student wants to calculate the probability of scoring an ""A"" on the second test. Historically, the instructor knows that the join
If the civil service wishes to set a cut-off score on the exam so that 15% of the test takers fail the exam, what should the cut-off score be?
Question: A black and red die are thrown and let X be a random variable denoting the sum of the dice
What is the probability that a salesperson selected at random will have below average sales ability and fair potential for advancement?
Suppose that the price of stock A is AED 25 and its standard deviation is 5. The average market price for all similar stocks is AED 20.Another stock B has a price of 30 and standard deviation of 15.
Out of a total of 10 college textbooks estimate the standard deviation of their ages if the oldest textbook is known to be 7.9 years old and the newest textbook is 1.3 years old.
Routine physical examinations are conducted annually as part of a health service program for the employees. It was discovered that 8% of the employees needed corrective shoes, 15% needed major denta
The next two questions refer to the following table where x= the number of days per week that 100 clients use a particular exercise facility. Complete the column of cumulative frequency
A study by the National Park Service revealed that 50% of the vacationers going to the Rocky Mountain region visit Yellowstone Park, 40% visit the Grand Tetons and 35% visit both. What is the probab
A distribution has a standard deviation of s = 12. Find the z- score for each of the following locations in the distribution.
What is the probability that a particular firm selected has $1 million or more in income after taxes?
Consider the hourly payments of a random sample of employees of a food processing plant given in Diagrams below:
A score that is 6 points below the mean corresponds to a z- score of z = -0.50. What is the population standard deviation?
You are phoning local businesses, assuming that the percentage is true in your area. You call 3 firms. What is the probability that all 3 are owned by women?
A sample of the homes currently offered for sale revealed that the mean asking price is $75,900, the median $70,100 and the modal price is $67,200. The standard deviation of the distribution is $5,9