Search found 32 matches
probability
The probability of having a particular disease in a population is 5%. A diagnostic test to determine if a person has this disease is 83% accurate. Find the probability that a randomly selected person tests positive. Do you think 83% is the probability to choose a person that has positive diagnose an...
- by manhhiep2509
Fri Sep 26, 2014 7:38 am- Forum: Problem Solving
- Topic: probability
- Replies: 1
- Views: 2089
Standard deviation
Toss a coin 4 times.
What is the standard deviation of the number of heads that you expect to see in those four tosses?
- by manhhiep2509
Fri Sep 26, 2014 7:01 am- Forum: Problem Solving
- Topic: Standard deviation
- Replies: 1
- Views: 1145
A foreman for an injection-molding firm
A foreman for an injection-molding firm admits that on 10% of his shifts, he forgets to shut off the injection machine on his line. This causes the machine to overheat, increasing the probability from 2% to 20% that a defective molding will be produced during the early morning run. What proportion o...
- by manhhiep2509
Sun Sep 21, 2014 7:21 am- Forum: Problem Solving
- Topic: A foreman for an injection-molding firm
- Replies: 3
- Views: 11103
Hi. Please explain why after find the total possible number of the telephone numbers, we have 10 divided by 270? I have thought that the chance that there is one correct phone numbers and 9 incorrect phone numbers is: (1/270)*[(269/270)^9]*10! The correct answer choice seems to indicate that each pi...
- by manhhiep2509
Sun Mar 30, 2014 1:38 am- Forum: Problem Solving
- Topic: Probability problem
- Replies: 5
- Views: 2010
In Britain, "pig" refers to any member
In Britain, "pig" refers to any member of the class of domestic swine, but the United States uses the term when referring only to younger swine not yet ready for market and weighing less than 82 kilograms (180 pounds). (A) the United States uses the term when referring (B) the United State...
- by manhhiep2509
Sat Feb 01, 2014 5:05 pm- Forum: Sentence Correction
- Topic: In Britain, "pig" refers to any member
- Replies: 2
- Views: 3542
I also see the question in another source and OA is C , different from that of the first poster. A says the two hotel have different entrances, but so what? Eventually, the amounts of foot traffic are similar. C says people can go to the restaurant without going through the lobby. In other words, th...
- by manhhiep2509
Thu Jan 30, 2014 9:19 am- Forum: Critical Reasoning
- Topic: Carpet Problem!!! Weaken
- Replies: 4
- Views: 4505
Africa’s black rhino population in the mid
Africa’s black rhino population in the mid-1970’s numbered about 2,000, ten times the estimated population of 2,000 in 1997. A. the estimated population B. that of their estimated population C. more than the population’s estimated amount D. more black rhinos than their population estimate E. m...
- by manhhiep2509
Wed Jan 29, 2014 9:07 pm- Forum: Sentence Correction
- Topic: Africa’s black rhino population in the mid
- Replies: 1
- Views: 1348
A new commercial radio station in Greenfield plans
A new commercial radio station in Greenfield plans to play songs that were popular hits fifteen to twenty-five years ago. It hopes in this way to attract an audience made up mainly of people between thirty-five and forty-five years old and thereby to have a strong market appeal to advertisers. Each ...
- by manhhiep2509
Wed Jan 29, 2014 9:02 pm- Forum: Critical Reasoning
- Topic: A new commercial radio station in Greenfield plans
- Replies: 2
- Views: 1859
In addition to her work on the miocene homicide fossil
In addition to her work on the miocene homicide fossil record, Mary Leakey contributed to archaelogy with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting East African paintings. (A) Leakey contributed to archaeology with her discovery of the earliest d...
- by manhhiep2509
Wed Jan 29, 2014 8:56 pm- Forum: Sentence Correction
- Topic: In addition to her work on the miocene homicide fossil
- Replies: 9
- Views: 5279
More than 300 rivers drain into Siberia
More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined . A. More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North Amer...
- by manhhiep2509
Wed Jan 29, 2014 8:45 pm- Forum: Sentence Correction
- Topic: More than 300 rivers drain into Siberia
- Replies: 3
- Views: 6637
The company announced that its profits declined
The company announced that its profits declined much less in the second quarter than analysts had expected it to and its business will improve in the second half of the year. A) had expected it to and its business will improve B )had expected and that its business would improve C )expected it would ...
- by manhhiep2509
Wed Jan 29, 2014 8:40 pm- Forum: Sentence Correction
- Topic: The company announced that its profits declined
- Replies: 2
- Views: 2134
- by manhhiep2509
Tue Jan 28, 2014 5:19 am- Forum: Critical Reasoning
- Topic: commercial radio station
- Replies: 11
- Views: 4795
Two computer companies, Garnet and Renco
Two computer companies, Garnet and Renco, each pay Salcor to provide health insurance for their employees. Because early treatment of high cholesterol can prevent strokes that would otherwise occur several years later, Salcor encourages Garnet employees to have their cholesterol levels tested and to...
- by manhhiep2509
Tue Jan 21, 2014 11:30 pm- Forum: Critical Reasoning
- Topic: Two computer companies, Garnet and Renco
- Replies: 2
- Views: 2659
In a certain wildlife park
In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer ...
- by manhhiep2509
Mon Jan 20, 2014 12:32 am- Forum: Critical Reasoning
- Topic: In a certain wildlife park
- Replies: 4
- Views: 2222
Over the past few years, banks have systematically raised their old fees and invented new ones that are harder and harder for consumers to avoid . (A) banks have systematically raised their old fees and invented new ones that are harder and harder for consumers to avoid (B) banks are systematically...
- by manhhiep2509
Fri Jan 17, 2014 12:31 am- Forum: Sentence Correction
- Topic: Bank fees
- Replies: 3
- Views: 1640