Question
In: Math
On average, indoor cats live to 15 years old with a standard deviation of 2.7 years....
On average, indoor cats live to 15 years old with a standard
deviation of 2.7 years. Suppose that the distribution is normal.
Let X = the age at death of a randomly selected indoor cat. Round
answers to 4 decimal places where possible.
a. What is the distribution of X? X ~ N(__,___)
b. Find the probability that an indoor cat dies when it is between
10.3 and 11.5 years old. ___
c. The middle 30% of indoor cats' age of death lies between what
two numbers?
Low: ____ years
High: ____ years
Fill in the "___"
Solutions
milcah answered 8 months agoRelated Solutions
On average, indoor cats live to 15 years old with a standard deviation of 2.5 years....
On average, indoor cats live to 15 years old with a standard
deviation of 2.5 years. Suppose that the distribution is normal.
Let X = the age at death of a randomly selected indoor cat. Round
answers to 4 decimal places where possible.
a. What is the distribution of X? X ~ N(,)
b. Find the probability that an indoor cat dies when it is between
10.9 and 14.8 years old.
c. The middle 30% of indoor cats' age of...
On average, indoor cats live to 14 years old with a standard deviation of 2.6 years....
On average, indoor cats live to 14 years old with a standard
deviation of 2.6 years. Suppose that the distribution is normal.
Let X=the age at death of a randomly selected indoor cat. Round all
numeric answers to 4 decimal places.
A. X ~ N( , )
B. Find the probability that an indoor cat dies when it is
between 9.9 and 13.7 years old
C. The middle 20% of indoor cats' age of death lies between what
two numbers?
Low:
High:
The average lifespan of a pigeon is 15 years, with a standard deviation of 2 years....
The average lifespan of a pigeon is 15 years, with a standard
deviation of 2 years.
a.Find the probability that a randomly selected pigeon lives
between 14 and 17years.
b.Find the year that marks the 90th percentile of the lifespan
of pigeons.
c. Find the probability that a sample of 40 pigeons will have an
average lifespan of less than 14 years.
Assume the average age of an MBA student is 34.9 years old with a standard deviation...
Assume the average age of an MBA student is 34.9 years old with
a standard deviation of 2.5 years. a) Determine the coefficient of
variation. b) Calculate the z-score for an MBA student who is 29
years old. c) Using the empirical rule, determine the range of
ages that will include 99.7% of the students around the mean. d)
Using Chebyshev's Theorem, determine the range of ages that will
include at least 91% of the students around the mean. e)...
Assume the average age of an MBA student is 30.7 years old with a standard deviation...
Assume the average age of an MBA student is 30.7 years old with
a standard deviation of 2.2 years.
a) Determine the coefficient of variation.
b) Calculate the z-score for an MBA student who is 26 years
old.
c) Using the empirical rule, determine the range of ages that
will include 95% of the students around the mean.
d) Using Chebyshev's Theorem, determine the range of ages that
will include at least 94% of the students around the mean.
e)...
Ryan is 50 years old and will retire in 15 years. He expects to live for...
Ryan is 50 years old and will retire in 15 years. He expects to
live for 25 years after he retires, until he is 90. He wants a
fixed retirement income that has the same purchasing power at the
time he retires as $40,000 has today. (The real value of his
retirement income will decline annually after he retires.) His
retirement income will begin the day he retires, 15 years from
today, at which time he will receive 24 additional...
Ryan is 50 years old and will retire in 15 years. He expects to live for...
Ryan is 50 years old and will retire in 15 years. He expects to
live for 25 years after he retires, until he is 90. He wants a
fixed retirement income that has the same purchasing power at the
time he retires as $40,000 has today. (The real value of his
retirement income will decline annually after he retires.) His
retirement income will begin the day he retires, 15 years from
today, at which time he will receive 24 additional...
24. Jessica wants to find the average lifespan of cats who are kept as indoor pets....
24. Jessica wants to find the average lifespan of cats who are
kept as indoor pets. She take a random sample of 13 indoor cats and
find the average lifespan is 14.1 years with a standard deviation
of 0.75. Assume the population distribution is approximately
normal. Jessica wants to create a 96% confidence interval for the
true average lifespan of all indoor cats. What is the 96%
confidence interval?
a.
(13.65, 14.55)
b.
(12.72, 13.68)
c.
(13.62, 14.58)
d.
(13.60,...
In the population, the average IQ is 100 with a standard deviation of 15. A team...
In the population, the average IQ is 100 with a standard
deviation of 15. A team of scientists wants to test
a new medication to see if it has either a positive or negative
effect on intelligence, or no effect at all. A
sample of 30 participants who have taken the medication has a
mean of 105. It is assumed that the data are
drawn from a normally distributed population. Did the medication
affect intelligence, using
α= 0.05?
a. State...
A process is operating with a mean of 2.7 meters and a standard deviation of .6....
A process is operating with a mean of 2.7 meters and a standard
deviation of .6. The customer has an upper specification of 3.9 and
lower specification of 1.5. What is the estimated percent in
spec?
A)5%
B)97.5%
C)95%
D)nearly 100%
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