Question

The percentage of the population that is in support of the current government is unknown, so a simple random sample of 700 people is selected from around the country. From the sample, 287 people support the current government. What is an estimate for the probability that from a simple random sample of size 20, than more than 5 of them support the government? Round your answer to 4 decimal places.

Answer #1

The percentage of an ocean population that has sharks is
unknown, so a simple random sample of 220 species is selected from
the ocean. From the sample, 37 of the species were sharks. If we
use the sample proportion as an estimate for the success
probability for the population, what is the standard error
associated to a sample of size 40 using this estimate? Round your
answer to 4 decimal places.

The percentage of the Illinois population with diabetes is
believed to be 9.1%.
B1) Suppose we decided to take a random sample
of 20 people from the Illinois population.
What is the probability that none of them have diabetes? (2
pts)
What is the probability that at least 20% of the sample has
diabetes? (2 pts)
B2) Suppose we decided to take a random sample
of 200 people from the Illinois population.
How many people would we expect to have...

Let p be the (unknown) true fraction of voters who
support a particular candidate A for office. To estimate
p, we poll a random sample of n voters. Let
Fnbe the fraction of voters who support
A among n randomly selected voters. Using
Central Limit Theorem, calculate the following.
a) Calculate an upper bound on the probability that if we poll
100 voters, our estimate Fndiffers from
p by more than 0.1.
b) How many voters need to be polled...

7. If I have a population of an unknown mean and unknown
standard deviation, what is the 95% confidence interval estimate of
the mean if a. A random sample of size 25 gives a mean of 50 and a
standard deviation of 12 b. A random sample of size 16 gives a mean
of 50 and a standard deviation of 12
8. The average cost per night of a hotel room in New York City
is $325. Assume this estimate...

1. To estimate the mean of a population with unknown
distribution shape and unknown standard deviation, we take a random
sample of size 64. The sample mean is 22.3 and the sample standard
deviation is 8.8. If we wish to compute a 92% confidence interval
for the population mean, what will be the t multiplier? (Hint: Use
either a Probability Distribution Graph or the Calculator from
Minitab.)

The mean of a population is 76 and the standard deviation is 13.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a. A random sample of size 36 yielding a sample
mean of 78 or more
b. A random sample of size 120 yielding a sample
mean of between 75 and 79
c. A random sample of size 219 yielding a sample
mean of less than 76.7
(Round all...

The mean of a population is 75 and the standard deviation is 14.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a.A random sample of size 34 yielding a sample
mean of 80 or more
b.A random sample of size 120 yielding a sample
mean of between 72 and 78
c.A random sample of size 220 yielding a sample
mean of less than 75.3

Suppose that 12% of a certain large population of people are
left-handed. A simple random sample of 9 people is selected from
this population. Find the following probabilities.
a) What is the probability exactly 3 people in the sample are
left-handed? Round to four decimal places. Answer
b) What is the probability that 2 or less people in the sample are
left-handed? Round to four decimal places. Answer

A population has a mean of 200 and a standard deviation of 50.
Suppose a simple random sample of size ̅ 100 is selected and ? is
used to estimate ?. 1. What is the probability that the sample mean
will be within ±5 of the population mean? 2. What is the
probability that the sample mean will be within ±10 of the
population mean?

Suppose 52% of the population has a college degree. If a random
sample of size 563 is selected, what is the probability that the
proportion of persons with a college degree will differ from the
population proportion by more than 5%? Round your answer to four
decimal places.

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