The average number of acres burned by forest and range fires in a large New Mexico...
The average number of acres burned by forest and range fires in a large New Mexico county is 2,300 acres per year, with a standard deviation of 550 acres. The distribution of the number of acres burned is normal.
a. What is the probability that between 1,700 and 2,600 acres will be burned in any given year?
b. What number of burnt acres corresponds to the 67th percentile?
Homework Answers
Add Answer to:
The average number of acres burned by forest and range fires in
a large New Mexico...
2. The average number of acres burned by forest and range fires in a large New...
2. The average number of acres burned by forest and range fires in a large New Mexico county is 4,300 acres per year, with a standard deviation of 750 acres. The distribution of the number of acres burned is normal. What is the probability that between 2,500 and 4,200 acres will be burned in any given year? Diodes used on printed circuit boards are produced in lots of size 1000 . taking samples of size 64 from each lot. If...
The yield, in tons of ore per day, at a given coal mine is approximately normally...
The yield, in tons of ore per day, at a given coal mine is approximately normally distributed with mean 500 tons and standard deviation 50. a) Find the probability that at least 480 tons of ore will be mined on a given day. b) Find the proportion of working days in which anywhere from 510 to 580 tons is mined. c) Find the probability that on a given day, the yield will be below 605 tons Question 4: Most graduate...
The average area of land burned by forest fires every year in Canada is 2.5 million...
The average area of land burned by forest fires every year in Canada is 2.5 million hm2 (square hectometres or hectares). What is this value in m2 and km2?
Unsure how to go about C and D. Please explain in reference to the Z table...
Unsure how to go about C and
D. Please explain in reference to the Z table so I can understand
if I'm starting this the same way I would get the answers for A and
B. I'm unsure if I need to add or subtract those answers to get the
between part. I know how to do D! TY!
HW Scor Score: 0 of 1 pt 4 of 8 (6 complete) 6.1.17-T 650 acres. The distribution of the number of...
(URGENT )The average number of chips in a large bag is 41 chips with a standard...
(URGENT )The average number of chips in a large bag is 41 chips with a standard deviation of 3 chips. You sample 30 bags of chips. Assuming a normal distribution, what is the probability the sample mean is 40 chips?
The web logs of a certain website show that the average number of hits in an...
The web logs of a certain website show that the average number of hits in an hour is 75 with a standard deviation equal to 8.6. We can assume that the number of hits in an hour is normally distributed. a) What's the probability of observing less than 60 hits in an hour? Use the normal approximation. b) What's the 99th percentile of the distribution of the number of hits? Use the normal approximation. What's the probability of observing between...
PART 1 Let X represent the average age of people living in Sun City. Assume that...
PART 1 Let X represent the average age of people living in Sun City. Assume that X has a normal probability distribution with μ=72 years and σ=10 years. You intend to measure a random sample of n=51 people. What is the mean of the distribution of sample means? μ¯x= What is the standard deviation of the distribution of sample means (i.e., the standard error in estimating the mean)? (Report answer accurate to 2 decimal places.) σ¯x= PART 2 In a...
Suppose that the average number of Facebook friends users have is normally distributed with a mean...
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 146 and a standard deviation of about 55. Assume seven individuals are randomly chosen. Answer the following questions. Rourd all answers to 4 decimal places where possible. a. What is the distribution of 2? 655 b. For the group of 7, find the probability that the average number of friends is more than 158. c. Find the third quartile for the average number...
26. A large survey found that an American family generates an average of 17.6 lb of...
26. A large survey found that an American family generates an average of 17.6 lb of glass garbage each year. Assume normal distribution with the standard deviation of 3.5 pounds. a. What proportion of families generates less than 17 lbs of glass garbage each year? b. If a family is selected at random, what is the probability that it generated less than 17 lbs of glass garbage in a year? c. If a sample of 35 families is randomly selected,...
The average number of words in a romance novel is 64,031 and the standard deviation is...
The average number of words in a romance novel is 64,031 and the standard deviation is 17,075. Assume the distribution is normal. Let X be the number of words in a randomly selected romance novel. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the proportion of all novels that are between 58,908 and 70,861 words. c. The 75th percentile for novels is words. (Round to the nearest...
2. The average number of acres burned by forest and range fires in a large New Mexico county is 4,300 acres per year, with a standard deviation of 750 acres. The distribution of the number of acres burned is normal. What is the probability that between 2,500 and 4,200 acres will be burned in any given year? Diodes used on printed circuit boards are produced in lots of size 1000 . taking samples of size 64 from each lot. If...
The yield, in tons of ore per day, at a given coal mine is approximately normally distributed with mean 500 tons and standard deviation 50. a) Find the probability that at least 480 tons of ore will be mined on a given day. b) Find the proportion of working days in which anywhere from 510 to 580 tons is mined. c) Find the probability that on a given day, the yield will be below 605 tons Question 4: Most graduate...
Unsure how to go about C and
D. Please explain in reference to the Z table so I can understand
if I'm starting this the same way I would get the answers for A and
B. I'm unsure if I need to add or subtract those answers to get the
between part. I know how to do D! TY!
HW Scor Score: 0 of 1 pt 4 of 8 (6 complete) 6.1.17-T 650 acres. The distribution of the number of...
The web logs of a certain website show that the average number of hits in an hour is 75 with a standard deviation equal to 8.6. We can assume that the number of hits in an hour is normally distributed. a) What's the probability of observing less than 60 hits in an hour? Use the normal approximation. b) What's the 99th percentile of the distribution of the number of hits? Use the normal approximation. What's the probability of observing between...
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 146 and a standard deviation of about 55. Assume seven individuals are randomly chosen. Answer the following questions. Rourd all answers to 4 decimal places where possible. a. What is the distribution of 2? 655 b. For the group of 7, find the probability that the average number of friends is more than 158. c. Find the third quartile for the average number...
Most questions answered within 3 hours.
-
It is said that Galileo discovered a basic principle of the
pendulum—that the period is independent...
asked 1 minute from now -
The Cost of Equity and
Flotation Costs
Messman Manufacturing
will issue common stock to the public...
asked 5 minutes ago -
a) summarize the challenges facing New Britain today
b) identify some of its strengths
c) suggest...
asked 7 minutes ago -
**86 at 40 not 88. please show how got Tr in calculations thank
you
2) The...
asked 8 minutes ago -
McGlaun Company pays its employees every two weeks. The firm
last paid its employees on September...
asked 21 minutes ago -
You have been gifted a Mogwai as a pet and decide to do a little
online...
asked 26 minutes ago -
given the standard of 200 mg/dl and the absorbance of that
standard is 0.640. What is...
asked 29 minutes ago -
Exercise 8-51 Algo
An accounting professor is notorious for being stingy in giving
out good letter...
asked 37 minutes ago -
month
total distribution cost
level of activity (unit produced)
july
230.000
3500
august
250.000
3750
september...
asked 38 minutes ago -
A smoke detector system uses two devices, A and B. If smoke is
present, the probability...
asked 1 hour ago -
Your division head has assigned another important project to you
and your team. This project is...
asked 51 minutes ago -
Under normal use conditions, the Mean Time To Failure of a
heating coil can be modeled...
asked 1 hour ago