Question

Of all the trees planted by a landscaping firm, 85% survive. What is the probability that 12 or more of the 14 trees they just planted will survive? (Use a table of binomial probabilities. Give your answer correct to four decimal places.

Answer #1

Of all the trees planted by a landscaping firm, 65% survive.
What is the probability that 14 or more of the 16 trees they just
planted will survive? (Use a table of binomial probabilities. Give
your answer correct to four decimal places.)

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...

A landscaping firm is interested in estimating the proportion of
trees that survive one year after being planted. Based on a cluster
sample of 63 clients it is found that out of the 598 trees that
were planted, 545 survived. What would be a 95% confidence interval
for the true proportion of trees that survived one year?

The manufacturer of a fertilizer guarantees that, with the aid
of the fertilizer,
70%
of planted seeds will germinate. Suppose the manufacturer is
correct. If
7
seeds planted with the fertilizer are randomly selected, what is
the probability that more than
5
of them germinate?
Carry your intermediate computations to at least four decimal
places, and round your answer to two decimal places.

The manufacturer of a fertilizer guarantees that, with the aid
of the fertilizer, 80% of planted seeds will germinate. Suppose the
manufacturer is correct. If 9 seeds planted with the fertilizer are
randomly selected, what is the probability that more than 7 of them
germinate?
Carry your intermediate computations to at least four decimal
places, and round your answer to at least two decimal places.

The manufacturer of a fertilizer guarantees that, with the aid
of the fertilizer, 80% of planted seeds will germinate. Suppose the
manufacturer is correct. If 9 seeds planted with the fertilizer are
randomly selected, what is the probability that more than 6 of them
germinate? Carry your intermediate computations to at least four
decimal places, and round your answer to two decimal places. (If
necessary, consult a list of formulas.)

If an orange tree sapling is planted, it has a 70% chance of
growing into a healthy and productive tree. If 20 randomly selected
saplings are planted, answer the following. Use technology or the
binomial probability table to calculate the following
probabilities. Round solutions to four decimal places, if
necessary.
a) What is the probability that exactly 15 of them grow into a
healthy and productive tree?
P(x=15)=
b) What is the probability that less than 15 of them grow...

A binomial probability distribution has p = 0.20 and n =
100.
(d) What is the probability of 17 to 23 successes? Use the
normal approximation of the binomial distribution to answer this
question. (Round your answer to four decimal places.)
(e) What is the probability of 14 or fewer successes? Use the
normal approximation of the binomial distribution to answer this
question. (Round your answer to four decimal places.)

The heights of pecan trees are normally distributed with a mean
of 10 feet and a standard deviation of 2 feet. 13. Show all
work. Just the answer, without supporting work, will
receive no credit.
(a) What is the probability that a randomly selected pecan tree
is between 9 and 12 feet tall? (Round the answer to 4 decimal
places)
(b) Find the 75th percentile of the pecan tree height
distribution. (Round the answer to 2 decimal places)
(c) For...

A local florist claims that 85% of all flowers sold
for Valentine’s Day are roses. Consider a
simple random sample of 150 orders for Valentine’s Day
flowers.
(a) What’s the probability that the proportion of roses in this
sample is more than
90%? Round your answer to four (4) decimal places.
(b) What’s the probability that the proportion of roses in this
sample is at most
78%? Round your answer to four (4) decimal places.
(c) What’s the probability that...

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