x p(x) -1 1/7 0 3/7 2 2/7 4 1/7 What is the expected value or mean of x? What is the variance of x?

Q: 1 2 3 4 5 I 0.70 0.60 0.70 0.60 0.50 Factors II -0.60 0.40 -0.50 0.50 0.40 Ixx' 0.90 0.80 0.83 0.83…

A:

Q: X is a binomially distributed random variable with n= 10 and p= 0.25 Find the mean and variance…

A: Answer: From the given data, X follows binomial distribution, sample size (n) = 10 P = 0.25  and q =…

Q: 8 Four-week summer rainfall totals, in inches, in a section of the Midwestern United States have…

A: The Gamma distribution , α = 1.3 β = 3 Mean = ? Variance = ? P(X>4) = ?

Q: You want to read books and the number of books you read is X which is a Poisson random variable with…

A: Given that the number of books read is X, which is a Poisson random variable with parameter λ and N…

Q: Rates of return (annualized) in two investment portfolios are compared over the last 12 quarters.…

A: Given : Portfolio A : mean = 8.54 variance = 8.64 Portfolio B : mean = 8.1 variance = 0.88

Q: (a) p IX – 31 2 2 (b) p IX – 31 2 1

A:

Q: Find the probability that a random sample of 35 observations, from a normal population with varia o²…

A: Given information:

Q: Which one of the following relation between standard deviation (S.D.) and variance Var (: variable X…

A: What is the relationship between standard deviation and Variance?

Q: The probability of finding a significant result if the hypothesis is true is called statistical…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: For a Binomial Distribution if n =6 and 9 P(X=4) =P(X=2) find i) Variance

A:

Q: The average exam score is 66 with a variance of 20.  Your exam has a Z score of 0.12. What is your…

A: The z score indicates how many standard deviations that a data points away from the mean. It can be…

Q: You are given: Number of Claims Probability Claim Size Probability 1 25 150 50 200 Claim sizes are…

A:

Q: Rates of return (annualized) in two investment portfolios are compared over the last 12 quarters.…

A:

Q: Let p be the probability of obtaining heads when a coin is tossed and assume that p is in the range…

A:

Q: random sample of size 50 is taken from a geometric distribution with a parameter 0.45. Find the…

A: We know that The pmf of Geometric distribution is P(X=x) = qxp ; x= 0,1,2,. . .

Q: What is the distribution of X? 1) Out of the 38 pizzas that you try, how many would you expect to…

A: Let p be the probability of you liking the pizza. Given that p = 0.08

Q: Find the expected value of x

A: Expectation is a concept in probability. It is similar to mean.

Q: P(x) 0.1 0.3 0.2 0.3 0.1 Find (?(?≥1) Find the expected value (mean) of ?.

A:

Q: Skewness is defined as ((X-μ)³/a) where is the mean and ² is the variance. If the exponential…

A:

Q: Let Y be a random variable with mean zero and variance o². What do we know about the quantity 1 (Yi…

A: Given that,  Y = 1n∑i=1nYi  Now,  1n∑i=1nYi - Y = 1n∑i=1nYi - 1n×nY = Y - Y = 0

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: mean of the probability distribution on the random variable

A:

Q: E(Y-Y')² represents the standard error of estimate O the standard deviation O the variance the total…

A: We need to choose appropriate option for given statement.

Q: Repeated measures study with a total n=24, and a sample mean difference score of MD=4 is obtained.…

A: It is given that Sample size n = 24 Mean difference MD = 4 Variance of differences s2 = 216

Q: Negative correlation coefficient indicates that the movement of the variables are in: Opposite…

A: Negative correlation coefficient indicates that the movement of variables are in opposite direction.

Q: Question [5] The number of calories in a salad on the lunch menu is normally distributed with mean =…

A: Given data,Mean μ=100Variance σ2=16sd σ=4

Q: Please explain this well. Where does the 16 come from? Where does (1/8) come from? Please explain…

A: We will need substitution  Substitute this in the integral

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

A:

Q: X and Y are independent. If we are given P(X = 0) = P(X =1) = P(X =2) = }, P(Y = 1) = 3. P(Y = 2) =…

A: The question is simple and formula based, we need to know the mathematical formulas which are used…

Q: Rates of return (annualized) in two investment portfolios are compared over the last 12 quarters.…

A: Given Portfolio A Portfolio B 5.23.         8.96 10.91        8.60 12.49         7.61 4.17…

Q: How standard normal cumulative distribution function is used by Probit regression?

A: Probit regression, also called a probit model, is used for modelling variables with dichotomous or…

Q: Compute the mean of Y Compute the mean of X. Compute the variance of X Compute the variance of Y…

A: Note:- "Since you have posted a question with multiple subparts, we will provide solutions only to…

Q: nonparametric or parametric? what test should we use if the variance assumption is satisfied, but…

A: Introduction -Parametric test - Parametric test are those make assumption about the parameters of…

Q: How to measure the variations for this data? Let’s use =Var.P(A:A) to calculate the variance first.…

A: Note that this a binary data hence we cannot calculate variance using general formula of variance…

Q: a. Develop an estimated regression equation for these data. If necessary enter negative value as…

A:

Q: You run a candle manufacturing factory and over the past year the average output of the factory is…

A: From the provided information, Mean (µ) = 480 Standard deviation (σ) = 10 X~N (480, 10) Sample size…

Q: x f(x) 20 0.10 25 0.20 30 0.25 35 0.15 40 0.10 45 0.10 50 0.10 compute expected value, variance,…

A: We want to find mean, variance and standard deviation

Q: Scenario: Suppose a financial institution holds a well diversified $35,500,000 position in stocks.…

A: In this question, we are given a financial institution's diversified position in stocks, the…

Q: summer rainfall totals, in inches, in a section of the Midwestern United States have approximately a…

A:

Q: The probability distribution of X, the number of imperfections for every 10 meters of a synthetic…

A: Solution-: Let, X-The number of imperfections for every 10 meters of a synthetic fabric  We have…