For a normal distribution, find the z-score that separates the distribution as follows: 1. Separate the highest 10% from the rest of the distribution 2. Separate the lowest 20% from the rest of the distribution

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Q: Blood pressure is 127.58 sample of 41 males,, 35-44 in age.. blood pressure of 5.76. Find 95% co…

A: Given: Sample meanx¯=127.58Sample size(n)=41Sample standard deviation(s)=5.76

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A: @solution:::   Given data : typical high school student 7.5 hours 180 days  for 4 years  For…

Q: Mean 255, x is 230 and z score is -2 find standard deviation

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A: Harmonic mean: it is defined as the reciprocal of the mean of reciprocals. HM=n∑1X

Q: Find the proportion of Normally distributed observations with a zz-score above 0.84. Give your…

A: Let Z be the random variable from normal distribution with z-score above 0.84 then we will find the…

Q: a values that would allow 55% of the data to fall within the mean observing symmetry? Draw the curve…

A: Mean and standard deviation are given below:  μ = 8.70σ=2.1846 Z-score is a measure that indicates…

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Q: Where do p-values concentrate?

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Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

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Q: Write down the important properties of the Normal Curve.

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: The height of students at the SFSU dormitory is normally distributed with a population mean of 66…

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A: Solution

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A: a.  The response variable is jan_temperature. b. The explanatory variable is Latitude.c. The…

Q: 5.

A: Given:

Q: What are the limitations of an average in general?

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Q: The graph depicts IQ scores of 102 and 128, normally distributed with mean 100 and standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

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Q: Describe about the Properties of the Normal Curve?

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: what is the symbol for the first parameter of the distribution and whats the value?

A: Answer: - Actually we have p=0.40  and sample size n=100  , This is the binomial Distribution

Q: how do you find the standard deviation when the score is 9 points above tthe mean?

A: = population standard deviation = the size of the population = each value from the population =…

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A: Define empirical rule first .  Empirical Rule :  The empirical rule, also referred to as the…

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A: A moving average is a technique to get an overall idea of the trends in a data set; it is an average…

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Q: Define P-value?

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Q: Explain the relevance of mean and standard deviation to someone who does not know what they are. .…

A: Mean: The mean is a measure of central tendency. It gives an indication of the average value of a…

Q: The mean always has a z-score (value) →

A: When the data is converted into z scores, the mean will always end up being zero.

Q: Describe about the Error Variability?

A: The element of variability is produced by factors, such as measurement imprecision, and is not…

Q: The most commonly used measure of central tendency

A: here use basic of central tendency

Q: Find the estimated mean speed

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Q: isn't it should use the normal table to find z value?

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Q: A data set has a mean of 70.7 and a standard deviation of 6.2. The score of 69, is how many standard…

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Q: Identify the​ t-statistic and P-value.

A: The sample size n is 23.

Q: HumanPregnancy Norm STEM Assume that the length of human pregnancies from conception to birth varies…

A: Mean(µ) = 266 Standard deviations (σ) = 16 X ~ N (µ, σ )= N ( 266,16)

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