Question

Suppose that 70% of all dialysis patients will survive for at least 5 years.

In a simple random sample of 100 new dialysis patients, what is the probability that the proportion surviving for at least five years will exceed 80%, rounded to 5 decimal places?

Answer #1

About 73% of all female heart transplant patients will survive
for at least 3 years. Seventy female heart transplant patients are
randomly selected. What is the probability that the sample
proportion surviving for at least 3 years will be less than 66%?
Assume the sampling distribution of sample proportions is a normal
distribution. The mean of the sample proportion is equal to the
population proportion and the standard deviation is equal to
StartRoot StartFraction pq Over n EndFraction EndRoot ....

Cancer survival rates indicate the percentage of people who
survive a certain type of cancer for a specific amount of time.
Cancer statistics often use an overall 5-year survival rate. For
instance, the overall 5-year survival rate for bladder cancer is
75%. That means that of all people diagnosed with bladder cancer,
75 out of every 100 were able to survive beyond 5 years.
Suppose that there was a new treatment for bladder cancer and a
study was conducted to...

Suppose that the Average student is 20.6 years with a standard
deviation of 1.7 years. Suppose we obtain a simple random sample of
100 students ages.
1) What is the expected sample average age?
2) What is the standard deviation of the sample average?
3) Find the probability that the sample average is at least 21.3
years.

QUESTION 7
Suppose the observational units in a study are the patients
arriving at an emergency room on a given day, 11 Nov 2019. For the
following indicate whether it can legitimately be considered a
variable or not:
Whether or not men have to wait longer than women
yes
no
5 points
QUESTION 8
A survey company published results of a survey stating that 56%
of the 600 randomly sampled residents planned to set off
firereworks on July...

In a certain country, the probability that a woman reaches the
age of 70 is 0.7
and the probability that a woman lives to be 80 is 0.5.
(a) If a woman from that country is 70 years old, what is the
conditional probability that
she will survive to 80 years?
(b) Suppose that three sisters born in that country live
completely independent lives. What
is the probability that they will all be alive at the age of
70?
(c)...

1.a. The survival rate during a risky operation for patients
with no other hope of survival is 86%. What is the probability that
exactly four of the next five patients survive this operation?
(Give your answer correct to three decimal places.)
b. Of all the trees planted by a landscaping firm, 10% survive.
What is the probability that 10 or more of the 12 trees they just
planted will survive? (Use a table of binomial probabilities. Give
your answer correct...

In a simple random sample of 70 automobiles registered
in a certain state, 24 of them were found to have emission levels
that exceed a state standard.
What proportion of the automobiles in the sample had emission
levels that exceed the standard? Round the answer to two decimal
places.
Find a 95% confidence interval for the proportion of automobiles
in the state whose emission levels exceed the standard. Round the
answers to three decimal places.
Find a 98% confidence interval...

2.A researcher believes that about 70% of the seeds planted with
the aid of a new chemical fertilizer will germinate. He chooses a
random sample of 140 seeds and plants them with the aid of the
fertilizer. Assuming his belief to be true, approximate the
probability that more than 97 of the 140 seeds will germinate. Use
the normal approximation to the binomial with a correction for
continuity.
Round your answer to at least three decimal places. Do not round...

Suppose a hospital gets simple random sample of 600 patients
opinions on conditions at that hospital and the proportion of those
patients who say that doctors always communicated well is 0.79.
What is the 95% confidence interval for the true proportion of
patients of that hospital that say doctors always communicated
well?

Suppose that the probability of a convicted shoplifter repeating
the crime within 5 years is .30. Of 200 convicted shoplifters, what
is the probability that at least 70 will shoplift again during the
next five-year period?
Use the normal approximation to the binomial here. Answer

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