Question

1 ) In a study done by Statistics Weekly, they found that 12% of people believe that there will eventually be a zombie apocalypse. Suppose we have a random sample of 500, would it be unusual to find 43 people who believe that there will eventually be a zombie apocalypse. Would it be unusual to find 70 people who believe that there will eventually be a zombie apocalypse?

2)-If a flight is on time 90% of the time, use a normal approximation to the binomial to find the probability that between 175 and 190 out of a total of 200 flights will be on time.

3-) The age at the time of marriage was obtained for a random sample of 10 women. The results were 28, 24, 22, 25, 33, 35, 27, 26, 27, 20. Assume that the population has a normal distribution. Find a 90% confidence interval for the mean age at which a woman marries. Interpret your answer.

Answer #1

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1- In a study done by Statistics Weekly, they found that 12% of
people believe that there will eventually be a zombie apocalypse.
Suppose we have a random sample of 500, would it be unusual to find
43 people who believe that there will eventually be a zombie
apocalypse. Would it be unusual to find 70 people who believe that
there will eventually be a zombie apocalypse?
2-The age at the time of marriage was obtained for a random
sample...

****PLEASE ANSWER ALL QUESTIONS****
Question 7 (1 point)
The owner of a local golf course wants to determine the average
age of the golfers that play on the course in relation to the
average age in the area. According to the most recent census, the
town has an average age of 38.58. In a random sample of 20 golfers
that visited his course, the sample mean was 36.61 and the standard
deviation was 7.505. Using this information, the owner calculated...

Question 15 (1 point)
A USA Today article claims that the proportion of people who
believe global warming is a serious issue is 0.63, but given the
number of people you've talked to about this same issue, you
believe it is less than 0.63. The hypotheses for this test are Null
Hypothesis: p ≥ 0.63, Alternative Hypothesis: p < 0.63. You take
a random sample and perform a hypothesis test, getting a p-value of
0.5939. What is the appropriate conclusion?...

A.) Let x = age in years of a rural Quebec woman at the
time of her first marriage. In the year 1941, the population
variance of x was approximately ?2 =
5.1. Suppose a recent study of age at first marriage for a random
sample of 41 women in rural Quebec gave a sample variance
s2 = 3.0. Use a 5% level of significance to
test the claim that the current variance is less than 5.1. Find a
90%...

1.In the following problem, check that it is appropriate to use
the normal approximation to the binomial. Then use the normal
distribution to estimate the requested probabilities.
More than a decade ago, high levels of lead in the blood put 86% of
children at risk. A concerted effort was made to remove lead from
the environment. Now, suppose only 8% of children in the United
States are at risk of high blood-lead levels.
(a) In a random sample of 216...

Total plasma volume is important in determining the required
plasma component in blood replacement therapy for a person
undergoing surgery. Plasma volume is influenced by the overall
health and physical activity of an individual. Suppose that a
random sample of 43 male firefighters are tested and that they have
a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma
per kilogram body weight). Assume that σ = 7.70 ml/kg for the
distribution of blood plasma.
(b) What conditions...

1.
DDT is a pesticide banned in the United States for its danger to
humans and animals. In an experiment on the impact of DDT, six rats
were exposed to DDT poisoning and six rats were not exposed. For
each rat in the experiment, a measurement of nerve sensitivity was
recorded. The researchers suspected that the mean nerve sensitivity
for rats exposed to DDT is greater than that for rats not poisoned.
The data follow:
Poisoned rats:
12.207
16.869
25.050...

READ THE CASE STUDY AND ANSWER THE FOLLOWING QUESTIONS
2nd CASE: An
Unexplained Death
A 65-year-old man of Scandinavian descent was rushed to the
Emergency Room of your local hospital after a family member
discovered him unconscious in his home. The woman who dialed “911”
told the dispatcher that the man, her brother, was the local
librarian of the past 10 years and had no spouse or children. She
reported that they had spoken the day before, and he had...

Delta airlines case study
Global strategy. Describe the current global
strategy and provide evidence about how the firms resources
incompetencies support the given pressures regarding costs and
local responsiveness. Describe entry modes have they usually used,
and whether they are appropriate for the given strategy. Any key
issues in their global strategy?
casestudy:
Atlanta, June 17, 2014. Sea of Delta employees and their
families swarmed between food trucks, amusement park booths, and
entertainment venues that were scattered throughout what would...

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

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