The mean and standard deviation of a normal variate X is 2 and 4 respectively. Find third and fourth moment about mean.

Q: e scores on a test are normally distributed with a mean of 150 and a standard deviation of 30. What…

A: Solution:  Let X be the score on test are normally distributed with mean 150 and standard deviation…

Q: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…

A: The formula for z-score is z = x - μσ where μ is the mean and σ is the standard deviation.…

Q: Range = 38 Mean = 28.5555556 Variance = 147(253)/(300) Standard deviation = 12.27 ⠀ ⠀ 19, 40, 42, 7,…

A: Variance          Standard deviation

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: A set of exam scores are reported as X values and z-scores. On this exam a score of X = 72…

A: X = 72 corresponds to a z-score = +1.00 and a score of X = 52 corresponds to a z-score = -1.00.  We…

Q: The mean of the data is 25.16 and it's coefficient of variation is 18.75 . Find the standard…

A: The coefficient of variance, COV = sx¯*100 s is the standard deviation x¯ is the sample mean To find…

Q: Can you find the mean and the standard deviation with this data?

A: Given: Data on Index finger length for female. Step-by-step procedure to obtain the mean and the…

Q: Fabienne found the standard deviation of the residuals to be 1.30. Explain this value in context.

A: The standard deviation of the residuals shows that how much the data points spread around the…

Q: tems produced by a manufacturing process are supposed to weigh 90 grams. However, there is…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The scores on a standardized normally distributed with a mean of 95 and standard deviation of 10.…

A: Standardized z-score:   The standardized z-score represents the number of standard deviations the…

Q: The scores on a​ driver's test are normally distributed with a mean of 100.   Find the score that is…

A:

Q: The deviation of an entry x in a population data set is the difference between the entry and the…

A: Note: Hi there! Thank you for posting the question. It is considered that the deviation is taken…

Q: The sum of squares of deviation is least if measure from а. Median b. Mean

A: the sum of squares of deviation is least when measured from ?

Q: Write down the formulas for the standard deviation of x.

A: The formula for the sample standard deviation can be written as: Here, n is the sample size and x̅…

Q: 37 38 37 30 36 47 40 47 27 36 30 26 41 41 51 44 31 40 38 44 39 53 37 42 45 44 44 41 46 37 Do the…

A: We have given the data set of sample size 30. We have to calculate sample standard deviations. (b)…

Q: Interval 31-40 41-50 51-60 61-70 71-80 81-90 91-100 Frequency 3 4 6. 7 17 8

A: Given  Interval Frequency  31-40 3 41-50 4 51-60 6 61-70 7 71-80 17 81-90 5 91-100…

Q: 5. Given (kx? if z = 1, 2, 3, 4 P(x) = else sa probability function for a discrete random variable;…

A:

Q: Find the standard deviation of X

A: x P(x) x P(x)=E[x] x2 P(x)=E[x2] 0 0.44 0 0 1 0.31 0.31 0.31 2 0.16 0.32 0.64 3 0.05 0.15…

Q: standard deviation

A: If the random variable X follows a distribution with mean = μ and standard deviation = σ Then the Z…

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: scores on a test have a mean of 70 and Q3 is 83. the scores have a distribution that is…

A: Given information: Mean scores is, μ=70 The third quartile is, Q3=83 The scores are normally…

Q: Compute for the mean and standard deviation

A:

Q: What relation exists between the average deviation of the mean?

A: Note: Hi there! Thank you for posting the question. As your question is not clear, as per the…

Q: Stanford-binet IQ test scores are normally distributed with a mean score of 100 and a standard…

A: Given that  Stanford-binet IQ test scores are normally distributed with a mean score of 100 and a…

Q: The scores on a test are normally distributed with a mean of 200 and a standard deviation of 30.…

A: The score that is 2 ½ standard deviation above the mean is obtained below:From the given information…

Q: (Round calculated results to the hundredth (2 place to the right of beyond that unless otherwise…

A: The given data is as follows, Accept rate Grad rate 5 96 5 97 6 95 8 98 10 96 10 94…

Q: 1 2 3 4 5 6 7 XX 8 A B с College ID Accept rate (%) Grad rate (%) 1 5 96 5 97 6 95 8 98 10 96 10 94…

A: Given that: College ID Accept rate (%) Grad rate (%) 1 5 96 2 5 97 3 6 95 4 8 98 5 10…

Q: he scores on a standardized test are normally distributed with a mean of 115 and standard deviation…

A: The scores on a standardized test are normally distributed with Mean = 115 Standard deviation = 20

Q: Compute P(X) using the binomial probability formula. Then determine whether the normal distribution…

A: For X, well defined random variable and X~B(n,p), the pmf is P(X=x)=nCxpxq(n-x) ; x=0,1,2...n…

Q: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…

A:

Q: Use the probability distribution to complete parts (a) and (b) below. The number of defects per 1000…

A: Let X be the random variable having probability mass function is,  Defects (x)  0 1 2 3 4 5…

Q: The scores on a standardized test normally distributed with a mean of 110 and standard deviation of…

A: Here we need to find the score corresponding to  z = 2.2 standard deviations above the mean. Mean is…