Question

1. In a standard normal distribution, the

Group of answer choices

mean is 1 and the standard deviation is 0.

mean and the standard deviation can have any value.

mean is 0 and the standard deviation is 1.

mean and the standard deviation are both 1.

2.

For the density curve below, which of the following is true?

Group of answer choices

It is skewed left.

The mean is about 0.7.

The total area under the curve is 1.

It is symmetric.

3. Suppose that a survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales tax.Suppose that 40% of all adults in Ohio support the increase. We independently select 7 adults at random and record their status in supporting the increase. What type of distribution does the above scenario satisfy?

Group of answer choices

Binomial distribution

Uniform distribution

Continuous distribution

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Answer #1

**1. In a standard normal distribution, the**

mean is 0 and the standard deviation is 1.

**2. For the density curve below, which of the following
is true?**

The total area under the curve is 1.

**3. Suppose that a survey asks a random sample of 1500
adults in Ohio if they support an increase in the state sales
tax.Suppose that 40% of all adults in Ohio support the increase. We
independently select 7 adults at random and record their status in
supporting the increase. What type of distribution does the above
scenario satisfy?**

Binomial distribution

Suppose X has a normal distribution with mean 3 and standard
deviation 1. The 95th percentile of this distribution is
Group of answer choices
4.28
-4.28
4.94
-4.64
4.64
2.
Suppose X = 5 is a measurement from a normal population with
mean 2 and standard deviation 3. The corresponding Z-score is
Group of answer choices
2
5
0
1
3
3. Suppose X is a standard normal random variable. Among other
things this implies that the mean of X...

Which of the following does NOT describe the standard normal
distribution? Choose the correct answer below.
A. The total area under the curve must equal 1.
B. The graph is symmetric.
C. It is a normal distribution with a mean of 0 and a standard
deviation of 1.
D. The graph is uniform.

Which of the following is a characteristic of the
normal distribution?
A. The standard deviation equals to 0.
B. The mean equals to 1
C. The curve Is symmetrical
D. The bell curve is skewed
The normal distribution curve has the property of
being asymptotic; this means that .
A. The area under the curve is not skewed to the left
B. The curve is symmetrical
C. The area under the curve is not skewed to the right
D. The...

The standard normal distribution is a normal distribution with a
mean of _____ and a standard deviation of ______
(respectively).
A. 0, 1
B. 0, 0
C.1, 0
D. 1, 1

1. For which type of continuous distribution are the mean and
the median always the same?
uniform and normal distributions only
all of the above
uniform distribution
exponential distribution
normal distribution
2. The skewness of a normal distribution is:
negative
zero
positive
something that varies
3. The standard normal probability distribution has a mean of
______ and a standard deviation of ______.
0, 1
1, 0
1, 1
0, 0
4. Any normal probability distribution can be converted to a...

Assume that x has a normal distribution, and find the indicated
probability.
1) The mean is 15.2 and the standard deviation is 0.9. Find the
probability that x is greater than 17.
2) Let x be a continuous random variable that follows a normal
distribution with a mean of 17.3 and a standard deviation of 3.2.
Find the value of x so that the area under the normal curve to the
left of x is .500.
Please show all the...

1) Choose from the Following: Gaussian Distribution, Empirical
Rule, Standard Normal, Random Variable, Inverse Normal, Normal
Distribution, Approximation, Standardized, Left Skewed, or
Z-Score.
Same as the Normal Distribution
A statement whose reliability is based
upon observation and experimental evidence; formulas based upon
experience rather than mathematical conclusions.
A [_______ ________] is a quantity
resulting from a random experiment that can assume different values
by chance.
A result that is not exact, but is
accurate enough for some specific purposes.
The...

The mean brain volume for a group of healthy adults is collected
and the mean brain volume of adults diagnosed with
obsessive-compulsive behavior is also obtained. The results are
listed below. Test the claim that there is a difference between the
two population means. Use a 0.01 significance level.
Control Group: n = 10 sample mean = 0.45 sample
standard deviation = 0.08
Obsessive-compulsive patients: n = 10 sample mean = 0.34
sample standard deviation =...

With a mean of 16, a Poisson distribution can be approximated by
a normal distribution with the same mean. It is known that, under a
normal distribution, in between the two lines [mean - 1 standard
deviation] and [mean + 1 standard deviation] approximately 68% of
the area under the normal curve is covered. If Bigfield is facing
its peak demand period with an average of 16 jobs per day and its
capacity is set at 20 jobs per day,...

The distribution of the commute times for the employees at a
large company has mean 22.4 minutes and standard deviation 6.8
minutes. A random sample of n employees will be selected and their
commute times will be recorded. What is true about the sampling
distribution of the sample mean as n increases from 2 to 10 ? The
mean increases, and the variance increases. A The mean increases,
and the variance decreases.
B The mean does not change, and the...

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