Calculus and Above

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A population of values has a normal distribution with μ =
A population of values has a normal distribution with μ = 188.6 and σ = 78.4 . You intend to draw a random sample of size n = 147 .What is the mean of the distribution of sample means? μ ¯ x =What is … read more
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A population has parameters μ = 190.5 and σ = 37.2. You
A population has parameters μ = 190.5 and σ = 37.2 . You intend to draw a random sample of size n = 80 .What is the mean of the distribution of sample means? μ ¯ x =What is the standard deviation of t… read more
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Assume the random variable X is normally distributed with
Assume the random variable X is normally distributed with mean μ = 40 and standard deviation σ = 11. What is the probability P (X <52)?… read more
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Assume the random variable X is normally distributed with
Assume the random variable X is normally distributed with mean μ = 40 and standard deviation σ = 11. What is the probability P (X <52)?… read more
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Assume the random variable X is normally distributed with
Assume the random variable X is normally distributed with mean μ=90 and standard deviation σ=12. Compute the probability P(57 < X < 107).… read more
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1 point) A random sample of 80 observations produced a mean
1 point) A random sample of 80 observations produced a mean of x⎯⎯⎯=33.7 from a population with a normal distribution and a standard deviation σ=3.75.(a) Find a 90% confidence interval for μ≤μ≤(b) Fin… read more
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1 point) The length, X, of a fish from a particular mountain
1 point) The length, X, of a fish from a particular mountain lake in Idaho is normally distributed with μ=8.7 inches and σ=1.7 inches.(a) Is X a discrete or continuous random variable? (Type: DISCRETE… read more
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Assume that x has a normal distribution with the specified
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 13.8; σ = 3.5 P(8 ≤ x ≤ 12) =… read more
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Porphyrin is a pigment in blood protoplasm and other body
Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per de… read more
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A population of values has a mean of .4 and standard
A population of values has a mean of 69.4 and standard deviation of 18.9 and. You intend to draw a random sample of size n = 185 .What is the mean of the distribution of sample means? μ ¯ x =What is t… read more
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Sandhya_sharma
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A population has parameters μ=153.9 and σ=82.9. You intend
A population has parameters μ=153.9 and σ=82.9. You intend to draw a random sample of size n=119What is the mean of the distribution of sample means?What is the standard deviation of the distribution … read more
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Suppose a simple random sample of size n=49 is obtained from
suppose a simple random sample of size n=49 is obtained from a population with μ=84 and σ=28. Choose th ecorrect description of the shape of the sampling distribution of x. a. the distribution is unif… read more
R.R. Jha
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Chapter 6 00. The average rent in a city is $1,570 per month
Chapter 6 00. The average rent in a city is $1,570 per month with a standard deviation of $200. Assume rent follows the normal distribution. Use the empirical rule to answer the following questions. a… read more
akch2002
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Identify the null hypothesis Ho & the alternative hypothesis H1
Identify the null hypothesis Ho and the alternative hypothesis H1. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 1 in every one thousa… read more
Ryan
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1. The lengths of human pregnancies are normally distributed
1. The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days? (Points : 6)… read more
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For Steve, 1. Assume the random variable x is normally
For Steve, 1. Assume the random variable x is normally distributed with mean u = 87 and sigma = . Find indicated probability. P(73… read more
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(A) A sampling distribution is a distribution of all sample
(A) A sampling distribution is a distribution of all sample statistics that describe a particular sample. T-F, and why or why not? (B) A random sample of size 36 is to be selected from a population th… read more
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Exam scores were normal in MIS 200. Jason's exam score was
Exam scores were normal in MIS 200. Jason's exam score was 1.41 standard deviations above the mean. What percentile is he in? A.68th B.84th C.75th D.92nd To convert a normally distributed variable X i… read more
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