Question
In: Statistics and Probability
On a planet far far away from Earth, IQ of the ruling species is normally distributed...
On a planet far far away from Earth, IQ of the ruling species is
normally distributed with a mean of 103 and a standard deviation of
17. Suppose one individual is randomly chosen. Let X = IQ of an
individual.
a. What is the distribution of X? X ~ N(,)
b. Find the probability that a randomly selected person's IQ is
over 85. Round your answer to 4 decimal
places.
c. A school offers special services for all children in the bottom
7% for IQ scores. What is the highest IQ score a child can have and
still receive special services? Round your answer to 2
decimal places.
d. Find the Inter Quartile Range (IQR) for IQ scores. Round
your answers to 2 decimal places.
Q1:
Q3:
IQR:
Solutions
orchestra answered 2 years agoRelated Solutions
On a planet far far away from Earth, IQ of the ruling species is normally distributed...
On a planet far far away from Earth, IQ of the ruling species is
normally distributed with a mean of 100 and a standard deviation of
16. Suppose one individual is randomly chosen. Let X = IQ of an
individual.
a. What is the distribution of X? X ~ N( ,
b. Find the probability that a randomly selected person's IQ is
over 116. Round your answer to 4 decimal places.
c. A school offers special services for all children...
On a planet far far away from Earth, IQ of the ruling species is normally distributed...
On a planet far far away from Earth, IQ of the ruling species is
normally distributed with a mean of 105 and a standard deviation of
14. Suppose one individual is randomly chosen. Let X = IQ of an
individual.
a. What is the distribution of X? X ~ N(,)
b. Find the probability that a randomly selected person's IQ is
over 97. Round your answer to 4 decimal places.
c. A school offers special services for all children in...
On a planet far far away from Earth, IQ of the ruling species is normally distributed...
On a planet far far away from Earth, IQ of the ruling species is
normally distributed with a mean of 119 and a standard deviation of
15. Suppose one individual is randomly chosen. Let X = IQ of an
individual. a. What is the distribution of X? X ~ N( 119 , 15 ) b.
Find the probability that a randomly selected person's IQ is over
113. Round your answer to 4 decimal places. c. A school offers
special services...
Long, long ago, on a planet far, far away, a physics experiment was carried out. First,...
Long, long ago, on a planet far, far away, a physics experiment was
carried out. First, a 0.210-
kg
ball with zero net charge was dropped from rest at a height of
1.00
m.
The ball landed 0.450s
later. Next, the ball was given a net charge of
7.80?C
and dropped in the same way from the same height. This time the
ball fell for 0.635s
before landing.
What is the electric potential at a height of 1.00
m
above...
Planet Tatooine in a galaxy far far away has 2 moons, Amana and Endinus. Amana has...
Planet Tatooine in a galaxy far far away has 2 moons, Amana and
Endinus. Amana has a period of 14 hours 24 minutes and an average
distance from the centre of Tatooine of
1.38 x 10^5 km. The average distance of Endinus from the centre
of Tatooine is 2.38 x 10^5 km.
a) What is the orbital period of Endinus?
b) Determine the mass of Tatooine.
IQ scores are known to be normally distributed. The mean IQ score is 100 and the...
IQ scores are known to be normally distributed. The mean IQ
score is 100 and the standard deviation is 15. What percent of the
population has an IQ between 85 and 105. Need to solve it through
Excel
) Scores on an IQ test are normally distributed. A sample of 20 IQ scores had...
) Scores on an IQ test are normally distributed. A sample of 20
IQ scores had standard deviation s = 8. The developer of the test
claims that the population standard deviation is ı = 12. Do these
data provide sufficient evidence to contradict this claim? Use the
Į = 0.05 level of significance.
3)
A) Reject H0. The population standard deviation appears to differ
from 12. B) Do not reject H0. There is insufficient evidence to
conclude that the...
Scores on an IQ test are normally distributed. A sample of 10 IQ scores had standard...
Scores on an IQ test are normally distributed. A sample of 10 IQ
scores had standard deviation s=7. (a) Construct a 98% confidence
interval for the population standard deviation . Round the answers
to at least two decimal places. (b) The developer of the test
claims that the population standard deviation is 9. Does this
confidence interval contradict this claim? Explain
The claim is that the IQ scores of statistics professors are normally distributed, with a mean...
The claim is that the IQ scores of statistics professors are
normally distributed, with a mean less than 133. A sample of 11
professors had a mean IQ score of 130 with a standard deviation of
8. Find the value of the test statistic.
The claim is that the IQ scores of statistics professors are normally distributed, with a mean...
The claim is that the IQ scores of statistics professors are
normally distributed, with a mean less than 125. A sample of 19
professors had a mean IQ score of 123 with a standard deviation of
4. Find the value of the test statistic. The value of the test
statistic is .....
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