Why n-1 is used in the denominator for the variance for a normally distributed continuous RV

Q: Describe the statistical techniques of Moving Averages and Exponential Smoothing?

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Since, you have you have posted a question with multiple subparts we will solve first three subparts…

Q: Scores on a certain test are normally distributed with a variance of 70. A researcher wishes to…

A: From the given information, the confidence level is 0.95, the variance is 70 and the margin of error…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Introduction: The confidence interval for the population mean, μ at the 100 (1 – α) % level of…

Q: Consider the variable X whose mean and variance are given respectively by Hx = 27.2 and Var(X) =8.…

A: GivenμX=27.2Var(X)=8

Q: = Two random variables X, Y have variances Var(X) = 2 and Var(Y): = 8. respectively. If the…

A: The values of Var(X) is 2, Var(Y) is 8 and ρxy is 1/3.

Q: Calculate the Residual associated with the prediction of your height. Is the predicted height an…

A: The regression equation that is calculated to predict the height using the shoes sizes is as follows…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: find the probability that the annual return of a random year will be less than 11.5%.

A: Given that Arithmetic mean of the annual retum = 9.5%The annual return below 8% is 25%And we know…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: The sample size is 42, sample mean is 37.5 and population standard deviation is 7.60.

Q: A plot of the residuals and frequencies is commonly called a

A: When there is an association between two variables, one variable may be expressed as a function of…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Given, n=40 X=37.5σ=7.80

Q: The standard deviation and variance vary in a related way since one can be calculated from the…

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Q: otal plasma volume is important in determining the required plasma component in blood replacement…

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Q: Birth weight at a local hospital for the past year had a normal distribution with a mean of 106…

A: The given information is that, the mean birth weight is 106 ounces and standard deviation is 6…

Q: ores on a certain test are normally distributed with a variance of 15. A researcher wishes to…

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Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: According to the professional house framers organization in North Texas, the mean gross income for…

A: From the provided information, Sample size (n) = 120 Sample mean (x̅) = $45500 Population standard…

Q: The average exam score is 63 with a variance of 33.  Your exam has a Z score of 0.96. What is your…

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Q: Weekly downtime of internet services from an internet service provider (in hours) has expected value…

A: Introduction: The expected value of X, the amount of weekly downtime (hours), is E (X) = 0.5; the…

Q: The sum of the squared deviation scores, aka the sum of the squares, is SS=60 for a sample of n=5…

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Q: True or False: The residual of a data point is the observed value minus the predicted value.

A: Introduction: The population regression model of a response variable y on explanatory variables, x1,…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Given Information: Sample mean (x) = 37.5 ml/kg Standard deviation (s) = 7.20 ml/kg Margin of error…

Q: Our random variable X has a beta distribution with a = 7 and B = 3. %3D What is the variance of the…

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Q: for the above i got the mean of 1, can you help me w the standard deviation and the variance

A: From the above parts Here we have Since, X ~ Binomial (n = 3 , p = 1/3)  Therefore, n = 3 , p = 1/3…

Q: A USE SALT (a) State the null hypotheses Ho and the alternate hypothesis H,. Ho: H -Select- H:…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

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Q: otal plasma volume is important in determining the required plasma component in blood replacement…

A: Given Information: Sample size n=40 Sample mean x¯=37.5 Population standard deviation σ=7.80…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Given,   Sample size = 44 Sample mean = 37.5 Population standard deviation = 7.40   Since the…