a normal population has a mean of 28 and a standard deviation of 5. what proportion of the population is less than 23? A). 0.1587 B).0.7389 C).0.8413 D).1.0000

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A:

Q: D LSTED ARE RATES Ok SPEED ON A HIGHWAY. USE THE DATA. To coNSTRNCTTA 98% CONPIDENCE INTERVAL…

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Q: 1. A line was measure with a steel tape as follows: Trial 1 2 3 4 5 Solve for: a. Most probable…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subpartsfor…

Q: A variable is normally distributed with mean 20 and standard deviation 5. Use your graphing…

A:

Q: Find the Least Significant Difference (LSD) when standard deviation = 23.5, df =6 and n312 %3! a.…

A: The LSD is given by the formula:

Q: If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value…

A: If a set of data has a mean of 50 and the standard deviation of 4.5. We have to find the z-score for…

Q: A variable is normally distributed with mean 21 and standard deviation 7. Use your graphing…

A: Given X is normal Distributed with mean µ = 21.0 and standard deviation σ = 7.0 now will using…

Q: Q2: b) For a mean of 70 and a standard deviation of 8, find standardized score for a value of 80.…

A: Givenmean(μ)=70standard deviation(σ)=8x=80

Q: Assume the cholesterol levels of an adult can be described by a Normal model with a mean of 185…

A: The mean of the distribution,  mg/dLThe standard deviation of the distribution, “Since you have…

Q: The mean monthly electricity expenses of randomly selected 39 households is 192 TL with a standard…

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Q: A variable is normally distributed with mean 20 and standard deviation 7. Use your graphing…

A: The given mean is 20 and standard deviation is 7.

Q: The scores on a mathematics exam have a mean of 78 and a standard deviation of 8. Find the x-value…

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Q: The mean length of a human pregnancy is 265​days, with a standard deviation of 9 days. Use the…

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Q: a used car lot lowers the price of every car in the lot by $300. what effect, if any will this have…

A: Mean, median and mode will decrease by $300.

Q: A variable is normally distributed with mean 20 and standard deviation 7. Use your graphing…

A:

Q: It is assumed that the results of a test follow a normal distribution with a mean of 78 and a…

A: It is given that the mean is 78 and the standard deviation is 6.

Q: . The variance of a sample of data is 4. The standard deviation of this sample is: a) 16 b) 4 c) 2…

A:

Q: A variable is normally distributed with mean 19 and standard deviation 4. Use your graphing…

A: From the provided information, Mean (µ) = 19 Standard deviation (σ) = 4 X~N (19, 4)

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Given X is normal Distributed with mean µ = 116.0 and standard deviation σ = 14.0 now will using…

Q: Men's heights are normally distributed with a mean of 68.6 inches and a standard deviation of 2.9…

A:

Q: Find the Least Significant Difference (LSD) when standard deviation = 23.5, df =6 and n=12 %3D a.…

A: It is given that the standard deviation is 23.5, df=6 and n=12.

Q: 54.2, o = 7.8, X =60.2 and n = 76. This is an example of the sampling distribution of the sample…

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Q: A variable is normally distributed with mean 17 and standard deviation 9. Use your graphing…

A: as per guideline expert have to answer first three subpart only dear student please upload other…

Q: The police reported that the average driver exceeds the 50 miles per hour speed limit by more than 8…

A: We have given that the average 57.33 miles per hour and standard deviation 4.29 miles per hour.…

Q: A statistician uses which of these values to calculate the estimated standard error (SM) when…

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Q: Suppose that the mean and standard deviation of the scores on a statistics exam are 81.7 and 6.75,…

A: The question is about normal distribution Given : Popl. mean score on stats exam ( μ ) = 81.7 Popl.…

Q: find each of the following areas. Write your answers in decimal form. Round to the nearest thousam…

A: Given A variable is normally distributed with mean 22 standard deviation 5. Use your graphing…

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let X=SAT exam score  Given that X is normally distributed with mean=500 and standard deviation=100…

Q: a. In a normal distribution, a = - (right or left) of the mean. b. -2, z = 6. This tells you that x…

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Q: . The result of an English exam show a mean score of 55 and a standard deviation of 6. What percent…

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Q: In using cusum chart with n=1, the process standard deviation should be estimated in a way similar…

A: Since we have to model standard deviation in cusum chart, we can use Xbar and S charts.

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let, X= SAT score  Given X follows normal distribution with mean=500 and standard deviation=100

Q: Human body temperatures have a mean of 98.4ºF and a standard deviation of 0.5ºF. Convert the…

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Q: a. standardized version of x. b. studentized version of x.

A: A variable has a mean of 100 and a standard deviation of 15. nine observations of this variable have…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.