Suppose x is a normally distributed random variable with mean of 5 and a variance of 4. The probability that x is greater than 10.52 is? The correct answer is .0029

Q: TEST STATISTIC FOR NO DIFFERENCE IN MEANS, UNEQUAL VARIANCES t = x1- x- 2 s 12 n 1+s 22 n 2

A: Test statistic for no difference in means, unequal variances is given by

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A:

Q: Which of the following is a fundamental difference between the t statistic and a z-score? a. The t…

A: We have define the basic difference between t statistic and z score

Q: How does each of the followings affect the size of the standard errors of the forecast error. Give a…

A: The standard error of forecasting is the error between the forecasted value and the observed value.…

Q: D Supplementary Exercise 4.3 1. The mean score of a random sample of 22 student applicants who took…

A: The provided information are: Sample size(n)=22Sample meanx¯=76.9Population varianceσ2=27.4

Q: ACTIVITY 2: Find the variance and the standard deviation of the following probability distributions.…

A: Given information- We have given the probability distribution for X.

Q: If X1 is the mean of a random sample of size n from a normal population with the mean u and the…

A: The given estimator z=w*X1 bar+(1-w)X2 bar is unbiased estimator of population mean (mu) also the…

Q: A sample ofn=9 men are asked." what is the fastest you have ever driven a car?" The sample mean is…

A: Given: n=9x¯=50s2=400μ=100

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

Q: Stock A has the expected return of 0.06 and standard deviation of O.10. Stock B has the expected…

A: The variance of the portfolio composed of stock 1 and stock 2, is measure of risk associated with…

Q: The mean height of a certain kind of plant is 183 centimeters. Suppose we want to carry out a…

A: Given The mean height of a certain kind of plant is 183 centimeters,

Q: II. Solve for the variance and standard deviation.

A:

Q: Which of the following is a fundamental difference between a t statistic and a z-score? Group of…

A: The objective is to define, which of the given statements holds true for differentiating the…

Q: 6 The blood pressure of a diabetic taken at random has a normal distribution with mean 126 and…

A: Given that Diabetic--- Mean = 126 , variance = 60 Non diabetic --- Mean = 121 , variance = 40 P (…

Q: "recent research has shown that although the pooled t test does outperform the two-sample t test by…

A: In the problem, β denotes the probability of the type II error and α represents the level of…

Q: Stoaches are fictional creatures, sometimes mistaken for mome raths. Suppose a two-tailed ? t -test…

A: According to the given information in this question We need to find the p value  When  t = -0.85015…

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: Given:…

Q: To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean…

A: Given:

Q: The data in tabulated form shown below are the number of children of family in each worker in a…

A: Given information: Worker Number of boys Number of girls Number of children A 3 1 4 B 4 2 6…

Q: 15 The table shows the number of car accidents per day and their corresponding probabilities. Find…

A: We have given that,  X be the random variable having probability mass function,       X :-   0…

Q: 4. Compute the average deviation on the data below Test scores X-Х bar Xi 57 60 65 70 78 s0 82 85…

A: 4. Formula for Average deviation is, Average deviation=∑x'n Where x'=x-x¯ x¯=∑xin  , n=10…

Q: We determined the sum of the squared deviations to be Σ(x − x)2 = 21,912.1, and there are n = 10…

A: The sum of the squared deviations is=21912.1n=10

Q: 17A population has mean u 7 and standard deviation o = 2. %3D a Find the z-score for a population…

A: Givenmean(μ)=7standard deviation(σ)=2

Q: C. Given population 15, 12, 6, 9, and 17. Suppose samples of size 3 and 4 are drawn from this…

A: Given: The population is 15, 12, 6, 9, and 17.

Q: Solve the following problems. 1. The random variable x represents the number of people you meet on…

A: Given data is  x 0 1 2 3 4 P(x) 0.02 0.18 0.30 0.40 0.10

Q: The variability of the scores in a sample tends to be _____ the variability of the scores in the…

A: As, we know that larger the size of population,  larger the variability in the population,  if we…

Q: The population mean and standard deviation are given below. Find the required probability and…

A: note - Hi! Thank you for the question, As per the honor code, we are allowed to answer one question…

Q: The sample variance s² is an unbiased estimator of the population variance o² when the denominator…

A: An estimator is said to be unbaised if its expected value is equal to true value of the…

Q: ACTIVITY 2: Find the variance and the standard deviation of the following probability distributions.…

A: Given information- We have given the probability distribution for X.

Q: If E(x+4) = 6 and E(x+4)2 = 100 the value of standard deviation of x is O 5 O 8 none O 64 O 16

A:

Q: 15. A random variable X has a mean ? = 10 and a variance ? 2 = 4. Using Chebychev’s inequality,…

A: Given problem Given that   A random variable X has a Mean, μ = 10 and Variance , σ2= 4.

Q: An analysis of variance produces SSwtween - 30, SSwthin " 60, and an F-ratio with df -2, 15. For…

A: Given : SSbetween = 30 , Degrees of Freedom = 2   Calculating the Mean Squared value  MSbetween  =…

Q: Suppose X is a random variable with mean 10 and variance 9. Then P( 4 < X < 16) is greater than 0.5.…

A: Question 1: Let X is a random variable with mean 10 and variance 9. The value of P4&lt;X&lt;16 is,…

Q: 4 Given a random variableX, with standard deviationox, and a random variableY=aX +b, show that if…

A: Correlation Coefficient between two Random Variables: If X and Y be two random variables, then the…

Q: I keep getting 675 as an answer but this answer isn't correct. Could you help me solve for this?

A: To find the variance of the random variable Z = 9X + 8Y - 7, we need to use the formula for the…

Q: occur. Construct the Probability Distribution and solve for the mean, variance and standard…

A: It is given as the four coin tossed. The sample space isS = { HHHH, TTTT, HHHT, HHTH, HTHH, THHH,…

Q: (a) State the null and alternative hypotheses for testing Matt's claim, (Type the symbol "p" for the…

A: Matt thinks that he has a special relationship with the number 2, in particular, Matt thinks that he…

Q: We have the following information about the random variables X and Y: o² = 4.6, o} = 8.5, and pxy =…

A: Given that

Q: please answer

A: Part (a):The probability that we will have to wait more than a day for the next two accidents to…

Q: An elevator has a placard stating that the maximum capacity is 3800 lb-26 passengers. So, 26 adult…

A: From given data we have : mean μ=189 Standard deviation σ=36

Q: ACTIVITY 2: Find the variance and the standard deviation of the following probability distributions.…

A:

Q: Q.5 Suppose X is a discrete random variable with probability distribution given in the table below.…

A: Given :  x 1 2 3 5 8 13 21 P(x) 0.05 0.10 0.15 0.20 0.25 0.20 0.05 a. Mean and standard…

Q: The random variable X has a binomial distribution with n=20 and p 0.01. What is the mean and…

A: As in binomial distribution  Mean = n*p variance = n*p*(1-p)

Q: Stock Prices A random sample of stock prices per share (in dollars) is shown. Find the 80%…

A: 7.50,75.37,12.00,28.37,13.88,26.69,14.75,46.12,10.87,40.25,60.50,28.00,28.25,6.94,45.12sample…