Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 250 mg and a standard deviation of 48 mg. In a random sample of 500 adults, how many consume at least 320 mg of caffeine daily? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table, Of the 500 adults, approximately adults consume at least 320 mg of caffeine daily. (Round to the nearest whole number as needed.)

Q: Of a large group of men 5 per cent are under 60 inches in height and 40 per cent are between 60 and…

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Q: A vending machine is designed to dispense a mean of 7.6 oz of coffee into an 8-oz cup. If the…

A: Given X is normal Distributed with mean µ = 7.6 and standard deviation σ = 0.2 now will using…

Q: The bottom 10% of a normal distribution is below what z-score?

A: Our aim is to find the Z-score.

Q: ) In a normal distribution, what is the z- score of an observation that is at the 39th percentile?

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Q: From a normal distribution with μ = 80 and σ = 8, what proportion of the curve lies at X ≥ 90?

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Q: In a normal distribution, approximately ___ percent of the distribution falls between three standard…

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Q: Under what conditions can the mean of the sample be treated as a value that is from a population…

A: From the above data  under what conditions can the mean of the sample be treated as a value that is…

Q: What would a skewness of .163 mean? Is this normal distribution?

A: Solution:  Skewness: Skewness can be defined as the lack of symmetry in the data set.  In other…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Let X be the mathematics score in SAT exam. Therefore: X~Norm(μ=500, σ=100)

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A: Given,mean(μ)=87standard deviation(σ)=12

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Q: What proportion of a normal distribution is located above the mean?

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Q: The tensile strength of paper is modeled by a normal distribution with a mean of 36 pounds per…

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Q: On a standard normal distribution, what percentage of scores lie within 2.89 standard deviations on…

A: We need to find the scores that lie within 2.89 standard deviations.

Q: For a normal distribution, find the z-score that cuts off the top 68.31% of area. Round to 2 decimal…

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Q: The heights of 500 students are normally distributed with a mean of 175.5 centimeters and a standard…

A: Givenmean(μ)=175.5standard deviation(σ)=6.5n=500

Q: Assume the annual day care cost per child is normally distributed with a mean of $7000 and a…

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Q: A normal distribution has a mean of 80 with a standard deviation of 20 what score separates the…

A: Let x be the score which follows normal distribution with mean 80 and standard deviation 20. The…

Q: ssume the average amount of caffeine consumed daily by adults is normally distributed with a mean of…

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A: Given data,Mean μ=255sd      σ=2.5P(X<250)=?

Q: In a normal distribution, what percentage of the area under the curve is within three standard…

A: We have given the following statement about normal distribution.

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Topic- Probability

Q: Find the mean deviation about mean of rectangular distribution,

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Q: State the difference between the shape of the t distribution and the normal distribution?

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Q: For a normal distribution, the mean is equal to the median. True False

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Q: Assume the annual day care cost per child is normally distributed with a mean of $7000 and a…

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Q: In a Scrabble tournament, the scores were normally distributed and the mean score was 420.2 points…

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Q: For a normal distribution, the mode represents the second quartile. True/False

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Q: In a normal distribution, approximately what percent of data items fall within 1 standard deviation…

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Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 400 and a…

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Q: In a normal distribution, what percentage of the population lies with-in 1 standard deviation of the…

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Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

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Q: Given a normal distribution whose mean is 590 and whose standard deviation is 74, find the…

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Q: In a normal distribution, what z-score value separates the highest 90% of the scores from the rest…

A: Z  score : A z-score describes the position of a raw score in terms of its distance from the mean,…

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

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Q: Could this curve represent a normal distribution?

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Q: Given a normal distribution with mean of 80 and standa assumes a value greater than 76 is 0.3085.

A:

Q: A vending machine is designed to dispense a mean of 7.3 oz of coffee into an 8-oz cup. If the…

A: Follow step 2nd.

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 600 and a…

A:

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: Solution

Q: Assume the annual day care cost per child is normally distributed with a mean of $6000 and a…

A: Solution: Let X be the annual care cost per child. From the given information, X is normally…

Q: In a normal distribution, it is known that 27.34% of all the items are included from 100 up to the…

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Q: The manager of a paint supply store wants to determine whether the mean amount of paint contained in…

A: Given data isMean(x)=0.995standard deviation(s)=0.009sample size(n)=55α=0.01The null and alternative…