These days with the cost of a college education it is important to be able to graduate with a bachelors degree in 4 years. The National Association of Independent Colleges and Universities (NAICU) certainly would encourage students to attend independent schools. They provided the following information:
(i) |
20% of all college students attend private colleges and universities. |
(ii) |
55% of all college students graduate in 4 years. |
(iii) |
79% of students attending private colleges and universities graduate in 4 years. |
What is the probability that a randomly chosen student attended a private school and graduated in 4 years?
.55 / .79 = .6962
.20 / .55 = .3636
.20 / .79 = .2532
.55 * .79 = .4345
.20 * .55 = .11
.20 * .79 = .158
The next four questions refer to the following information:
Two methods, A and B, are available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of the time (method B is used the other 75% of the time).
The following notations are suggested:
Again we have two methods, A and B, available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of the time (method B is used the other 75% of the time).
What is the probability that a randomly chosen worker will learn the skill successfully?
P(L) = .75 * .80 = .60
P(L) = .25 * .95 = .2375
P(L) = .25 * .95 + .75 * .80 = .8375
P(L) = .25 * .80 + .75 * .95 = .9125
P(L) = .25 * .75 + .95 * .80 = .9475
gain we have two methods, A and B, available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of the time (method B is used the other 75% of the time).
A worker learned the skill successfully. What is the probability that he was taught by method A?
.25×.95=.2375.25×.95=.2375
.95.95
.25×.95.95 + .80≈.1357.25×.95.95 + .80≈.1357
.75×.80.25×.95 + .75×.80≈.7164.75×.80.25×.95 + .75×.80≈.7164
.25×.95.25×.95 + .75×.80≈.2836.25×.95.25×.95 + .75×.80≈.2836
These days with the cost of a college education it is important to be able to...
These days with the cost of a college education it is important to be able to graduate with a bachelors degree in 4 years. The National Association of Independent Colleges and Universities (NAICU) certainly would encourage students to attend independent schools. They provided the following information: (i) 20% of all college students attend private colleges and universities. (ii) 55% of all college students graduate in 4 years. (iii) 79% of students attending private colleges and universities graduate in 4 years....
These days with the cost of a college education it is important to be able to graduate with a bachelors degree in 4 years. The National Association of Independent Colleges and Universities (NAICU) certainly would encourage students to attend independent schools. They provided the following information: (i) 20% of all college students attend private colleges and universities. (ii) 55% of all college students graduate in 4 years. (iii) 79% of students attending private colleges and universities graduate in 4 years....
Name: Two teaching methods, A and B, are implemented for learning Spanish. There is a 70% chance of successfully learning Spanish if method A is used, and a 85% chance of success if methodB is used. However, method B is substantially more 3. time consuming and is therefore used only 20% of the time (method A is used the other 80% of the time). The following notations are suggested: A-Method A is used. B-Method B is used. L-Spanish was learned...
'Student Pair' 'Standard Teaching Method' 'New Teaching Method' 1 51 67 2 72 90 3 85 82 4 51 63 5 73 76 6 72 73 7 65 78 8 72 94 9 72 85 10 95 100 11 70 80 12 60 72 13 57 100 14 48 58 15 74 89 16 63 97 17 82 88 18 57 45 19 87 81 20 65 99 21 48 69 22 97 70 23 61 47 24 83 73...
DATA: ( You will have to paste it to a text editor and format it
to be entered into statcrunch - sorry for inconvenience but I could
not find another way to post the data)
Strategy Code Score
C 1 45
C 1 53
C 1 72
C 1 55
C 1 67
C 1 53
C 1 66
C 1 54
C 1 53
C 1 67
C 1 60
C 1 64
C 1 69
C 1 52...
Student stress at final exam time comes partly from the
uncertainty of grades and the consequences of those grades. Can
knowledge of a midterm grade be used to predict a final exam grade?
A random sample of 200 BCOM students from recent years was taken
and their percentage grades on assignments, midterm exam, and final
exam were recorded. Let’s examine the ability of midterm and
assignment grades to predict final exam grades.
The data are shown here:
Assignment
Midterm
FinalExam...
DATA
DATA: ( You will have to paste it to a text editor and format it
to be entered into statcrunch - sorry for inconvenience but I could
not find another way to post the data)
Strategy Code Score
C 1 45
C 1 53
C 1 72
C 1 55
C 1 67
C 1 53
C 1 66
C 1 54
C 1 53
C 1 67
C 1 60
C 1 64
C 1 69
C 1...
DATA: ( You will have to paste it to a text editor and format it
to be entered into statcrunch - sorry for inconvenience but I could
not find another way to post the data)
Strategy Code Score
C 1 45
C 1 53
C 1 72
C 1 55
C 1 67
C 1 53
C 1 66
C 1 54
C 1 53
C 1 67
C 1 60
C 1 64
C 1 69
C 1 52...
The laboratory performed a comparison study of LDL-c values in 40 participants (40 samples are split so are considered matched or pairs) using two different analyzers, the Abbott and the Roche. The Abbott is considered the gold standard method used in many facilities and the Roche is new and of interest due to faster turn-around time and economical factors. The purpose of the comparison study is to determine if there is a significant difference in results by the two methods...