Question

For a population that is left skewed with a mean of 24and a standard deviation equal to 18,determine the probability of observing a sample mean of 23or more from a sample of size 36.

Answer #1

µ = 24

sd = 18

n = 36

= P(Z > -0.33)

= 1 - P(Z < -0.33)

= 1 - 0.3707

= 0.6293

For a normal population with a mean equal to 83 and a standard
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view page 1 of the cumulative standardized normal table. LOADING...
Click here to view page 2 of the cumulative standardized normal
table. LOADING... Upper P left parenthesis x overbar less than or
equals 89 right parenthesis

A sample of size 36 cases is drawn from a negatively skewed
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many points must we go from the mean to include 50 percent of all
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The mean of a population is 76 and the standard deviation is 13.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a. A random sample of size 36 yielding a sample
mean of 78 or more
b. A random sample of size 120 yielding a sample
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c. A random sample of size 219 yielding a sample
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(Round all...

The mean of a population is 75 and the standard deviation is 14.
The shape of the population is unknown. Determine the probability
of each of the following occurring from this population.
a.A random sample of size 34 yielding a sample
mean of 80 or more
b.A random sample of size 120 yielding a sample
mean of between 72 and 78
c.A random sample of size 220 yielding a sample
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A normally distributed population has a mean of
560
and a standard deviation of
60
.
a. Determine the probability that a random sample of size
25
selected from this population will have a sample mean less
than
519
.
b. Determine the probability that a random sample of size
16
selected from the population will have a sample mean greater
than or equal to
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Although either technology or the standard normal distribution
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A population has mean 72 and standard deviation 6.
Find the mean and standard deviation of X for samples
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Find the probability that the mean of a sample of size 45 will
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Question 1 (1 point)
A population is slightly skewed to the right, has a mean of 75
and a standard deviation of 7. If a random sample of 28 items are
selected from this population, then the mean score of these 28
items is from a sampling distribution that has a mean of ...
Your Answer:
Question 1 options:
Answer
Question 2 (1 point)
A population is slightly skewed to the left, has a mean of 71
and a standard...

A normally distributed population has a mean of 500 and a
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random sample of size selected from this population will have a
sample mean less than . 9 455 b. Determine the probability that a
random sample of size selected from the population will have a
sample mean greater than or equal to . 25 532 a. P x < 455 =
(Round to four decimal places as needed.) b....

A sample of size 15will be drawn from a population with mean 135
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.
(a) Is it appropriate to use the normal distribution to find
probabilities for x?
(b) If appropriate find the probability that X will be
less than 118
.
(c) If appropriate find the
90th percentile of x
A sample of size 15will be drawn from a population with mean 135
and standard deviation 36
.
(a) Is it appropriate to use the normal...

a population has mean 48.4 and standard deviation 6.3 (a) find
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