A population of values has a normal distribution with �=51.8 and �=56.5. A random sample of size �=199 is drawn. What is the mean of the distribution of sample means?��¯= Incorrect What is the standard deviation of the distribution of sample means? Round your answer to two decimal places.��¯=

Q: A distribution of values is normal with a mean of 218.7 and a standard deviation of 48.2. Find P74,…

A: Press 2ND and VARS Choose invnorm

Q: A score of is 3 standard deviations above the mean.

A: Let , X→N(μ=140 , σ=28) Our aim is to find the score 3 standard deviation above mean

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A: X follows a Normal distribution with mean = 100 and S.D = 15 Then z=(x-mean)/SD = (x-100)/15…

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A: The standard error of the mean of a simple random sample of size 100 chose from the population is…

Q: The distribution of heights of adult men is approximately normal with a mean of 69 inches and a…

A: Mean = 69  Standard deviation = 2  Z-score = -0.5

Q: The distribution of room and board expenses per year at a four-year college is normally distributed…

A: We want to find z score  If Z Value lie outside (-3, 3) then it will be unusual.

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: We have provided a sample mean, sample standard deviation, and sample size. In each case, use the…

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Q: Part 1 of 2 Find the probability that x will be more than 30. Round the answer to at least four…

A: Given Information: Mean μ=31 Standard deviation σ=6 Sample size n=60   Based on the sampling…

Q: this data has a mean of 7.2 .  5, 7, 9, 10, 5 Calculate the sample standard deviation of this…

A: Central tendency measures the central value of the data set. Mean is a measure of central tendency.…

Q: The null hypothesis is that the laptop produced by HP can run on an average 120 minutes without…

A: Given,sample size(n)=60sample mean(x¯)=124population standard deviation(σ)=25Null hypothesis:…

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Q: please very soon full explanation.  The amount of time that it takes to complete a statistic exam…

A: The sample standard deviation (s) is equal to the standard deviation of the population σ divided by…

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A: 19)

Q: A normal distribution has mean u = 56 and standard deviation o = 20. Find and interpret the z-score…

A: X follows a Normal distribution with mean = 56 and S.D = 20 Then z=(x-mean)/SD = (x-56)/20…

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Q: Part a) What is the probability that a Duxcell battery will last longer than an Infinitycell…

A: Given that lifetime of Duxcell batteries:  X(mu1=10,sigma1=2)lifetime of Infinitycell battery:…

Q: What information can you get from a person’s z-score? Whether they are closer or farther from the…

A: Given that, What information can you get from a person’s z-score? Whether they are closer or…

Q: A population of values has an unknown distribution with = 65 and = sample of size n = = 58. What is…

A:

Q: Suppose you have a normal distribution with mean 110 and standard deviation 15. Approximately what…

A: Given that  Mean = M = 110 , Standard deviation = SD = 15 X ~ Normal (M = 110 , SD = 15)

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: given data,normal distribution μ=5σ=3probability that person will wait more than 9 minutes =?

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Q: ENG 342 fınal exam of last semester has a mean score of 78 and a standard deviation of 8. Sally's…

A: Given,mean(μ)=78standard deviation (σ)=8Z-Score=1.5

Q: Cerebral blood flow (CBF) in the brains of healthy people is normally distributed with a mean of 74…

A: The question is about normal distributionGiven :Population mean CBF reading (  ) = 74Population…

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A: The number of seeds were exposed to rock music, The number of seeds were exposed to classical music,…

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Q: 22. In a Mathematics test, the average mark is 82 and the standard deviation is 5. All the students…

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Q: What proportion of teams raised more than $347?

A: Let X denote amount of money raised by Clayton State teams for the Statistics Games. Given that X…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Let X denote the heights of adult men and it follows the normal distribution with mean of 69.0…

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A: Z- value can be calculated as, Z=χ-μσ We have to find area under normal curve between the mean and…

Q: Data with 550 observations are drawn from a bell-shaped distribution with a mean of 80 and a…

A: From the provided information,Number of observations (N) = 550

Q: A distribution of values is normal with a mean of 134 and a standard deviation of 71.4. Find P67…

A: Given: μ=134 and σ=71.4. From the given information,PZ<z=67%⇒PZ<z=0.67

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A: Solution: Let X be the number of gallons of gasoline sold. From the given information,

Q: Im

A: P10 , the score separating the bottom 10% from the top 90% is -21.8Explanation:

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A: We are given that if the z score for any value is less than or equal to -2, then that value is to be…

Q: a normal distribution has a mean of 125 and a standard deviation of 8. find the z-score for a data…

A: Ans#- A normal distribution has a mean of μ = 125 and a standard deviation of  σ = 8.           Find…