Question
In: Statistics and Probability
2. A group of 24 physical doctors from three countries consists of 7 Americans, 8 British...
2. A group of 24 physical doctors from three countries consists of 7 Americans, 8 British and 9 Chinese. They (wearing masks) are seated at random around a (large enough) table to discuss the means of treatment of COVID-19 patients. Compute the following probabilities:
(a) that all the Americans sit together; (b) that all the Americans and the British sit together; (c) that all the Americans, all the British and all the Chinese sit together.
(d) Randomly choose 6 doctors from the group of doctors in the above question to evaluate the efficiency of one type of treatment of COVID-19. It is unfair if all of the 6 doctors are from the same country. What is the probability that the selection is fair?
Solutions
orchestra answered 1 year agoRelated Solutions
A special committee of five professionals is formed from a group of four lawyers, three doctors...
A special committee of five professionals is formed from a group
of four lawyers, three doctors and three teachers. At least three
lawyers are needed in the special committee. Define X as the number
of teachers in the special committee.
a) Construct the probability distribution of the random variable
X.
b) Calculate the expected of X and provide an interpretation of
it.
c) Calculate the standard deviation of X
identify three countries from this group that are likely to have different reasons for not permitting...
identify three countries from this group that are
likely to have different reasons for not permitting the use of IFRS
by domestic listed companies. describe those reasons
A group of 9 friends includes 4 Americans, 2 Canadians, and 3 Italians. Three friends are...
A group of 9 friends includes 4 Americans, 2 Canadians, and 3
Italians. Three friends are to be selected at random for a trip.
Let X denote the number of Americans and Y be the number of
Canadians selected at random among the three friends selected for a
trip.
1) Find the joint probability density function of the random
variables X and Y and the marginal density functions.
2) Find Cov(2X-1, -Y+1).
Consider the data. xi 2 6 9 13 20 yi 7 19 8 24 22 (a)...
Consider the data.
xi
2
6
9
13
20
yi
7
19
8
24
22
(a)
What is the value of the standard error of the estimate? (Round
your answer to three decimal places.)
(b)
Test for a significant relationship by using the t
test. Use α = 0.05.
State the null and alternative hypotheses.
H0: β1 ≠ 0
Ha: β1 = 0
H0: β1 ≥ 0
Ha: β1 <
0
H0: β1 = 0
Ha: β1 ≠ 0
H0:...
A three-digit number is formed from nine numbers (1, 2, 3, 4, 5, 6, 7, 8...
A three-digit number is formed from nine numbers (1, 2, 3, 4, 5,
6, 7, 8 & 9). No number can be repeated. How many different
three-digit numbers are possible if 1 and 2 will not be chosen
together?
Select one:
a. 462
b. 336
c. 672
d. 210
A three-digit number is formed from nine numbers (1, 2, 3, 4, 5, 6, 7, 8...
A three-digit number is formed from nine numbers (1, 2, 3, 4, 5,
6, 7, 8 & 9). No number can be repeated. How many different
three-digit numbers are possible if 1 and 2 will not be chosen
together? a. 462 b. 210 c. 672 d. 336
The inflation rates in the British pound and the Australian dollar are 2% and 8% respectively....
The inflation rates in the British pound and the Australian
dollar are 2% and 8% respectively. What should the Sex /Forward ER
be, if the Spot ER is BP/ A$ .1? Describe the concept of purchasing
power.
Examine the three samples obtained independently from three populations: Population Data Item Group 1 Group 2...
Examine the three samples obtained independently from three
populations:
Population Data
Item
Group 1
Group 2
Group 3
1
14
17
17
2
13
16
14
3
12
16
15
4
15
18
16
5
16
14
6
16
Conduct a one-way analysis of variance on the data assuming the
populations have equal variances and the populations are normally
distributed. Use alpha = 0.05. Please be sure to clearly state the
null and alternative hypotheses, critical value, test statistic,
and...
7. According to the market research firm NPD Group, Americans ate an average of 211 meals...
7. According to the market research firm NPD Group, Americans
ate an average of 211 meals in restaurants in 2001. The following
data show the number of meals eaten in restaurants as determined
from a random sample of Americans in 2014: 212, 128, 197, 344, 143,
79, 180, 313, 57, 200, 161, 320, 90, 224, 266, 284, 231, 322, 200,
173. Using ? = .05, test the hypothesis that the number of meals
eaten at restaurants by Americans has not...
Consider the following terms from chapter 7, 8 and 9. Select three of the items and...
Consider the following terms from chapter 7, 8 and 9. Select
three of the items and briefly describe in your terms and give a
practical example:
1. Service Bluepring
2. Poka Yoke
3. Yield Management
4. Time Fence
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