Question

Thirteen jurors are randomly selected from a population of 5 million residents. Of these 5 million residents, it is known that 48% are of a minority race. Of the 13 jurors selected, 2 are minorities.

(a) What proportion of the jury described is from a minority race?

(b) If 13 jurors are randomly selected from a population where 48% are minorities, what is the probability that 2 or fewer jurors will be minorities?

(c) What might the lawyer of a defendant from this minority race argue?

Answer #1

Fourteen jurors are randomly selected from a population of 3
million residents. Of these 3 million residents, it is known that
42% are of a minority race. Of the 14 jurors selected, 2 are
minorities
(a) What proportion of the jury described is from a minority
race?
(b) If 14 jurors are randomly selected from a population where
42% are minorities, what is the probability that 2 or fewer
jurors will be minorities?
(c) What might the lawyer of a...

1, According to an airline, flights on a certain route are on
time 75% of the time. Suppose 10
flights are randomly selected and the number of on-time flights
is recorded.
(a) Explain why this is a binomial experiment.
(b) Find and interpret the probability that exactly 6 flights
are on time.
(c) Find and interpret the probability that fewer than 6
flights are on time.
(d) Find and interpret the probability that at least 6 flights
are on time....

6. Assume that 12 jurors are randomly selected from a population
in which 75% of the people are Mexican-Americans. Refer to the
probability distribution table below and find the indicated
probabilities.
Find the probability of exactly 6 Mexican-Americans among 12
jurors.
P(x=6)=
Find the probability of 6 or fewer Mexican-Americans among 12
jurors.
P(x≤6)=
Does 6 Mexican-Americans among 12 jurors suggest that the selection
process discriminates against Mexican-Americans?
no
yes

Assume that 12 jurors are randomly selected from a population in
which 76% of the people are Mexican-Americans. Refer to the
probability distribution table below and find the indicated
probabilities.
xx
P(x)P(x)
0
0+
1
0+
2
0+
3
0.0003
4
0.0018
5
0.0092
6
0.034
7
0.0924
8
0.1828
9
0.2573
10
0.2444
11
0.1407
12
0.0371
Find the probability of exactly 5 Mexican-Americans among 12
jurors. Round your answer to four decimal places.
P(x=5)=P(x=5)=
Find the probability of...

Suppose you are a lawyer representing a Hispanic individual in a
criminal trial. Twelve jurors are randomly selected by the state
from a population that you know to be 45% Hispanic. a. How many
jurors would you expect to be Hispanic?
b. The select process produces a jury with 3 Hispanic individuals
What proportion of the jury is Hispanic? (Enter your answer as a
decimal, rounded to four decimal places)
c. Use the binomial distribution and find the probability that...

Suppose there are 400 residents living in a 10-story dorm.
Thirty residents are randomly selected for a survey on the adequacy
of their dorm facilities.
19.(x pts) What is the population of interest?(Circle One)
(a) µ = .075 (d) p = .075 (b) The 400 residents living in the
dorm (e) The 30 residents surveyed (c) All students at the
university (e) None of these
20.(x pts) Suppose that we group the residents by which story
they live on. If...

Nine observations were randomly selected from population A and
eight observations were randomly selected from population B. The
populations are not necessarily normally distributed. Use the 0.05
significance level, a two-tailed test, and the Wilcoxon rank-sum
test to determine whether there is a difference between the two
populations. (Round your answers to 1 decimal
place.)
Population A:
12
14
15
19
23
29
33
40
51
Population B:
13
16
19
21
22
33
35
43
State the decision rule....

Suppose the following data are selected randomly from a
population of normally distributed values. 46 51 43 48 44 57 54 39
40 48 45 39 45 Construct a 95% confidence interval to estimate the
population mean. Appendix A Statistical Tables (Round the
intermediate values to 2 decimal places. Round your answers to 2
decimal places.)
≤ μ ≤

A particular sale involves 5 items randomly selected from a lot
of 15 that is known to contain 5
defectives. Let Y denote the number of defectives among
the 5 sold. What is P(Y >
E[Y ]) ?
The answer on key book said it is P(Y >
E[Y ]) = 0.5664
Please give me step by step to get this answer thx

12% of all Americans suffer from sleep apnea. A researcher
suspects that a higher percentage of those who live in the inner
city have sleep apnea. Of the 600 people from the inner city
surveyed, 81 of them suffered from sleep apnea. What can be
concluded at the 0.05 level of significance?
H0: p = 0.12
Ha: p [">", "Not Equal
To", "<"] 0.12
p-Value = ["0.12", "0.13", "0.125", "0.135"]
["Reject Ho", "Fail to Reject Ho"]
...

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