Determine the mean and the variance of X.

Q: Determine the variance of Z.

A: Helpful formulas (i)VaX=a2VX(ii)VC=0,where c is the constant(iii)VaX+ bY=a2VX+ b2VY

Q: 下riday Day of the Week no. of unit sol0 mon tue wed 4 Thu Sat dNT 3 Sunday 3.

A: Solution-: Let, X-be the number of unit sold We have following table: Day of the week X Monday…

Q: The variance of the data :. 6 ,6 ,-6,-6 is equal to

A: Find variance of the data  6 ,6 ,-6,-6

Q: In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the…

A: There are 3 independent samples which are Goliath, Varmint and Weasel. We have to find the variance…

Q: (b) The number of red balls in a sample of 8 balls chosen at random from a box contains 30 balls of…

A: We have to find the mean and variance of Hypergeometric distribution.

Q: Find the variance with solution

A:

Q: 10. The price of a gallon of milk at various stores is normally distributed. The price of a gallon…

A:

Q: Find the variance of the number of storms in August.

A: X: Number of thunderstorms in August.

Q: he density netion of the cont variable X, the total number of hours, in units of 100 hours, that a…

A: We want to find average and variance.

Q: Each morning John eats some eggs. On any given morning, the number of eggs he eats is equally likely…

A: Consider a random variable X defines the number of eggs eaten in 10 days.

Q: Find the variance of X X: 73,51,73,182,45,90,111

A:

Q: Actuaries use various parameters when evaluating the for the evaluation. Each year, the actuaries at…

A: Given that  Sample size n1=20 , n2=20 Sample variance s12=42.3 s22=47.6

Q: Suppose the variance of X is 95. What is the variance of .09X?

A: The objective of this question is to find the variance of a variable that has been scaled by a…

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

A: mean=μ=E(X)

Q: 6.34 As in Exercises 6.6, 6.10, and 6.20, in a study of the particulate pollution in air samples…

A: Given that, the joint pdf of X and Y is,  f(x,y)= 1  ; 0<=x<=2 ; 0<=y<=1  ; 2y<=x…

Q: Let X; be independent Uniform(-10,10) random variables, for i=1, 2, ..., 5. Let Y = X₁+X₂+...+X5.…

A: Let  be independent random variable follows uniform(-10, 10) distribution for i=1, 2,....., 5the…

Q: Find the mean and variance of

A: Given that fx=ke-2x,x>0 The value of k is calculated below: ∫0∞f(x)dx=1∫0∞ke-2xdx=1ke-2x-20∞=1…

Q: Consider the following frequency table. Frequency 8 4 15 7 21 10 28 11 3 Write down the mode. 2.

A: Using the formula of variance.

Q: X, =2, o =9, X2 =-1, ox, = 4 and Cx,x2 =-3, are transformed to new random variables Y, and Y,…

A:

Q: The variance is sometimes a negative number.

A:

Q: The cost of a week long vacation in a city has a mean of 1000 and a variance of 1200. The city…

A: Solution:  Given information: μ= 1000  Population mean σ2= 1200  Population varaince tax = 10%

Q: State the formula for Variance.

A: Equation that defines the population variance σ2=∑(X-μ)2N Here, σ2 is variance, (X-μ) is distances…

Q: Explain the variance of the sum or difference of the two variables X and Y ?

A: Variance of sum of two variables: The variance of the sum of two or more random variable is equal to…

Q: Solve for the variance of the weight of all the beans in a box. Also e

A: Let X be the weight of beans that the machine puts into a bag is a random variable with mean 16…

Q: Find the variance

A: Given : X~N(0, 7)

Q: Find the variance of x or the number of cups of coffee.

A: Given Information:

Q: Find the variance(2 decimal).

A:

Q: Five males with an X-linked genetic disorder have one child each. The random variable x is the…

A:

Q: Direction: On your answer sheets, match Column X to Column Y and Match Column Y to Column Z by…

A: Given that population size is N=5 And Observations Xi: 5, 6, 7, 8, 9 Population mean = summation…

Q: * 2.4.5.6-8-17 11 17 20 24 32 Xị 3 5 9 3 fi 1. 4) 5n 00

A: As per our guidelines we are suppose to answer only one question1)Given data set is…

Q: Actuaries use various parameters when evaluating the cost of a life insurance policy. The variance…

A: n1=n2 =30 dfn =n1-1  dfd=n2-1

Q: Find the variance for the set of data: 27, 31, 22, 25, 25. The variance is 0.

A: We have:-   population data set contain 5 numbers given as follows:- 27,31,22,25,25   To find :-…

Q: Frequency 2 1 0 Customer Combo Orders 1 2 Combo 3

A: Calculate mean from the given data

Q: You are conducting a study to see if students do better when they study all at once or in intervals.…

A: 1. Computing the values of the test statistics: The null and alternative hypotheses are: It is…