Search found 38 matches
Variation
For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative. What is the number of variations in sign for the sequence 1, -3, 2, 5, -4, -6? A.One B.Two...
- by mysseo
Thu Jan 12, 2012 6:47 pm- Forum: Problem Solving
- Topic: Variation
- Replies: 1
- Views: 976
OA is B. It was Kaplan CAT. IMO was A so I got it wrong on the test. Kaplan's explanation for A is out of scope. The source of the zinc is never addressed by the author. I am confused about out of scope and assumption. Sometimes, I thought it is out of scope but it is assumption.
- by mysseo
Wed Jan 11, 2012 11:19 am- Forum: Critical Reasoning
- Topic: thin pregnant woman
- Replies: 6
- Views: 2360
thin pregnant woman
A study of expectant mothers suggests that thin women can significantly increase their chances of bearing bigger babies by taking zinc supplements during pregnancy. Three hundred women who took 25 milligram zinc supplements starting with the 19th week of pregnancy were compared to 250 women who took...
- by mysseo
Tue Jan 10, 2012 12:48 pm- Forum: Critical Reasoning
- Topic: thin pregnant woman
- Replies: 6
- Views: 2360
- by mysseo
Tue Jan 10, 2012 9:31 am- Forum: Critical Reasoning
- Topic: genetics
- Replies: 6
- Views: 1570
genetics
If a geneticist selects any arbitrary group of people — for instance, those who enjoy watching football games — and examines them closely enough, he or she may well find a genetic marker common to all of them. But that shared marker need not have anything to do with the fact that they all like f...
- by mysseo
Mon Jan 09, 2012 8:55 pm- Forum: Critical Reasoning
- Topic: genetics
- Replies: 6
- Views: 1570
Thank you. OA is D. I was confused between B and D. Now it's clear that he is not convinced the 2nd "that ~".
- by mysseo
Fri Jan 06, 2012 9:32 pm- Forum: Sentence Correction
- Topic: social work education
- Replies: 3
- Views: 1334
- by mysseo
Fri Jan 06, 2012 9:26 pm- Forum: Critical Reasoning
- Topic: Electronic chips
- Replies: 5
- Views: 1876
social work education
Rejected the apprenticeship model of training social workers in philanthropic agencies, twentieth-century reformer Edith Abbott was convinced of social work education belong in the university so that students could be offered a broad range of courses dealing with social issues. A. of social work edu...
- by mysseo
Thu Jan 05, 2012 3:51 pm- Forum: Sentence Correction
- Topic: social work education
- Replies: 3
- Views: 1334
Electronic chips
Electronic computer chips made of tiny silicon wafers now regularly contain millions of electronic switches. Unfortunately, electronic switches that are this small cannot withstand intense radiation. Micro-Mechanics plans to produce a chip that, because it uses only microscopic mechanical switches, ...
- by mysseo
Thu Jan 05, 2012 3:15 pm- Forum: Critical Reasoning
- Topic: Electronic chips
- Replies: 5
- Views: 1876
Thank you Anurag,
"The probability of guessing the correct answer is 1/2" is the key to the solution. I couldn't think of this when I first encountered this problem.
- by mysseo
Mon Jan 02, 2012 11:05 pm- Forum: Problem Solving
- Topic: contest winner
- Replies: 4
- Views: 1167
Machine work
Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours. If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of carto...
- by mysseo
Mon Jan 02, 2012 10:46 pm- Forum: Problem Solving
- Topic: Machine work
- Replies: 5
- Views: 1647
contest winner
A contest will consist of N questions, each of which is to be answered either "True" or "False". Anyone who answers all N questions correctly will be a winner. What is the least value of N for which the probability is less than 1/1,000 that a person who randomly guessing the answ...
- by mysseo
Mon Jan 02, 2012 10:43 pm- Forum: Problem Solving
- Topic: contest winner
- Replies: 4
- Views: 1167
Thank you Anurag, the wording of the question" more than 1 S.D below the mean" made me confused. Now it's clear.
- by mysseo
Mon Jan 02, 2012 10:37 pm- Forum: Problem Solving
- Topic: standard deviation
- Replies: 4
- Views: 1023
Function f
The function f is defined for all positive integers N by the following rule: f(N) is the number of positive integers each of which is less than N and has no positive factor in common with N other than 1. If P is any prime number then f(P) =
A. P-1
B. P-2
C. (P+1)/2
D. (P-1)/2
E. 2
- by mysseo
Mon Jan 02, 2012 9:51 pm- Forum: Problem Solving
- Topic: Function f
- Replies: 3
- Views: 926
standard deviation
70, 75, 80, 85, 90, 105, 105, 130, 130, 130 The list shown consists of the times, in seconds, that it took each of 10 schoolchildren to run a distance of 400 meters. If the standard deviation of the 10 running times is 22.4 in seconds, rounded to the nearest tenth of a second, how many of the 10 run...
- by mysseo
Mon Jan 02, 2012 9:31 pm- Forum: Problem Solving
- Topic: standard deviation
- Replies: 4
- Views: 1023