Question
In: Statistics and Probability
Suppose a random variable X is normally distributed with mean 65.9 and standard deviation 9.5. Answer...
Suppose a random variable X is normally distributed with mean 65.9 and standard deviation 9.5. Answer the following questions:
P(42.15 < X < 77.30) = [round to 4 decimal places]
| Tries 0/5 |
P(X ≤ 73.50) = [round to 4 decimal places]
| Tries 0/5 |
P(X = 77.30) = [round to 4 decimal places]
| Tries 0/5 |
Suppose a is such that: P(X ≤ a) = 0.49. Then a = [round to 2 decimal places]
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What is the IQR (inter-quartle range) of X? [round to 2 decimal places
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose a random variable X is normally distributed with mean 65.3 and standard deviation 9.4. Answer...
Suppose a random variable X is normally distributed with mean
65.3 and standard deviation 9.4. Answer the following
questions:
1. P(47.44 < X < 76.58) = [round to 4 decimal places]
2. P(X ≤ 46.50) = [round to 4 decimal places]
3. P(X = 76.58) = [round to 4 decimal places]
4. Suppose a is such that: P(X ≤ a) = 0.39. Then a = [round to 2
decimal places]
5. What is the IQR (inter-quartle range) of X? [round...
Suppose a random variable X is normally distributed with mean 69.8 and standard deviation 8. Answer...
Suppose a random variable X is normally distributed
with mean 69.8 and standard deviation 8. Answer the following
questions:
P(55.40 < X < 74.60) =
[round to 4 decimal places]
Tries 0/5
P(X ≤ 62.60) = [round to 4 decimal
places]
Tries 0/5
P(X = 74.60) = [round to 4 decimal
places]
Tries 0/5
Suppose a is such that: P(X ≤
a) = 0.51. Then a = [round to 2 decimal
places]
Tries 0/5
What is the IQR (inter-quartle range) of...
Suppose a random variable X is normally distributed with mean 65 and standard deviation 7. Answer...
Suppose a random variable X is normally distributed
with mean 65 and standard deviation 7. Answer the following
questions:
1. P(48.90 < X < 70.60) = ____
[round to 4 decimal places]
2. P(X ≤ 65.70) = _____ [round to 4
decimal places]
3. P(X = 70.60) = ____ [round to 4 decimal
places]
4.Suppose a is such that: P(X ≤
a) = 0.46. Then a = ____ [round to 2 decimal
places]
5. What is the IQR (inter-quartle range)...
The random variable x is normally distributed with a mean of 68 and a standard deviation...
The random variable x is normally distributed with a mean of 68
and a standard deviation of 4. Find the interquartile range (IQR)?
Use R.
A random variable is normally distributed with a mean of 24 and a standard deviation of...
A random variable is normally distributed with a mean of 24 and
a standard deviation of 6. If an observation is randomly selected
from the distribution,
a. What value will be exceeded 5% of the time?
b. What value will be exceeded 90% of the time?
c. Determine two values of which the smaller has 20% of the
values below it and the larger has 20% of the values above it.
d. What value will 10% of the observations be...
Assume the random variable X is normally distributed with mean μ = 50 and standard deviation...
Assume the random variable X is normally distributed with mean μ
= 50 and standard deviation σ = 7. Compute the probability.
P(35<X<63)
The variable x is normally distributed with a mean of 500 and a standard deviation of...
The variable x is normally distributed with a mean of 500 and a
standard deviation of 50. Find a) The 60th percentile. b)The 35th
percentile. c)The x value which exceeds 80% of all x values. d)The
x value that is exceeded by 80% of all x values.
Suppose that the random variable X is normally distributed with standard deviation sigma =4. If the probability that...
Suppose that the random variable X is normally distributed with
standard deviation sigma =4. If
the probability that X between 20 and the
mean mu is 0.3944,
(a) Find mu .
(b) What value of X is such that only %33 of the values are above
it?
(c) If a sample of size 16 is taken at random from the above
distribution, what is the probability that it has an average
greater than 26?
A random variable is normally distributed. It has a mean of 245 and a standard deviation...
A random variable is normally distributed. It has a mean of 245
and a standard deviation of 21. a.) If you take a sample of size
10, can you say what the shape of the distribution for the sample
mean is? Why? b.) For a sample of size 10, state the mean of the
sample mean and the standard deviation of the sample mean. c.) For
a sample of size 10, find the probability that the sample mean is
more...
A random variable is normally distributed. It has a mean of 225 and a standard deviation...
A random variable is normally distributed. It has a mean of 225
and a standard deviation of 26.
If you take a sample of size 11, can you say what the shape of
the sampling distribution for the sample mean is? Why?
If the sample size is 11, then you can't say anything about the
sampling distribution of the sample mean, since the population of
the random variable is not normally distributed and the sample size
is less than 30....
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