Question 9 X is a random variable with mean and variance H and of, The standardized form of X is 2 = what are the mean and variance, respectively of Z? 2,1 B) 0,1 © 1,0 2,0

Q: A sample (X1, X2,..., X70) of size 70 was drawn from a population X. The mean of X is 30 and its…

A: According to the central limit theorem, when a sample a sufficiently large sample (size >= 30) is…

Q: The mean we ght of an adult is 76 kilograms with a variance of 100 if 142 adults are randomiy…

A: Given,mean(μ)=76standard deviation(σ)=10 sample size(n)=142

Q: There are four numbers in a data set. They are 3, 4, 10, and 11. a) What is the ∑∑ x2x2    b) What…

A: Number of samples (n) = 4 X X2 3 9 4 16 10 100 11 121

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: If y = {12, 3, 6, 6, 19, 5, 7, 2, 4, 6} is a population of scores then: The variance =…

A: From the provided information,The data values are as follow:y = {12, 3, 6, 6, 19, 5, 7, 2, 4, 6}n =…

Q: Question 18

A: The independent t-test assumes the variances of the two groups we are measuring are equal in the…

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

A: It is given that, Y = aX + b and the standard deviation of X is, σx.

Q: Be A and B independent random variables with variances o2 and o3, respectively. Being D = A + B and…

A:

Q: To obtain a maximum amount of variance, an item ought to have a degree of difficulty of what?

A: To obtain a maximum amount of variance an item ought to have a degree of difficulty is the number of…

Q: 2. Over the past week, I measured the resting heartrates of 24 women ages 30 - 50 and got the…

A: From the provided information, Sample size (n) = 24 Level of significance (α) = 0.05

Q: To study the variability of in a test with grades from 0 to 5, 17 students were drawn from a school…

A: Maximum=5, minimum=0. Which estimator has variance  minimum, then they have best estimator.

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

A: L

Q: Defective alternator and corroded or loose battery charges are a few of the main causes of battery…

A:

Q: Find the variance of the weight of all the beans in a box. Please provide where did you get the…

A: Farmula used V(nY)=n2V(Y)

Q: If the variance of the discrete random variable X = 36

A: Variance is 36

Q: From past experience, a professor knows that the test score of a student taking her final…

A: Given that the mean is 75 and variance is 25 That is, μ=75σ=25=5

Q: Provide an example of a random variable with variance of 0

A: Given that We have provide example of random variable with variance of 0

Q: QUESTION 9 An analysis of variance differs from a t test for independent means in that an analysis…

A: We want to tell you which one is the correct choice.

Q: A researcher calculates the variance of her sample to be s = -6. , what would you tell the…

A: Here's the explanation for this as follows; The sample variance, s², is used to calculate how varied…

Q: Suppose data X1, ..., Xn are sampled from the population, sample mean is a random variable

A: It is given that Sample : x1, x2,......,xn

Q: Let X1, X2, X3... X20 be a random sample from a distribution with mean 8 and variance 5. Find the…

A:

Q: Let X be a normal random variable with mean 2 and standard deviation 1. Which of the following…

A: Given that Let X denotes the normal distribution with mean=2 and standard deviation =1  Then we have…

Q: Scores on examination are assumed to be normally distributed with a mean of 72 and a variance of 50.…

A: Scores on examination are assumed to be normally distributed with a mean of 72 and a variance of 50.

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: 3) Suppose Y = 6X – 8, where X is a random variable with mean 2 and variance Determine the variance…

A: A random variable is mapping from the sample space to a measurable space. It considers each and…

Q: What's the variance i dont under stand

A: Given information X~Bin(n,p) q=1-p Mean=np and Variance=np(1-p)

Q: How to find the mean of the random variable x

A: The mean of the random variable x will depend on the distribution of x. Every distribution has its…

Q: If all 24 samples from a population produce the same age x = 20, what are the sample meanµ and the…

A: All 24 samples from a population produce the same age x=20. That is each xi=20 then

Q: We have a random variable Y with unknown mean value.  We have obtained a random sample of 10 values…

A: From the provided information, Sample size (n) = 10

Q: Person 1 (X) = 1 hour, z = -0.5 Person 2 (X) = 3 hours, z= 0.5 Person 3 (X) = 4 hours, z= 1 4. Using…

A: The question is about normal dist. Given : Person 1 ( X ) = 1 hr. , z = -0.5 Person 2 ( X ) = 3 hr.…

Q: If the maximит — 1.3, п %3D 150, and Z0.005 2.575, then find the variance %3D variance = 6.2.…

A: Givenmaximum=1.3n=150z0.005=2.575

Q: When a random variable X follows binomial distribution, the probability of success on one trian…

A: Answer: From the given data, number of trials is equal to = n = 125 The probability of success on…

Q: Is it possible for a variance to be negative? (yes or no) Under what conditions does the variance…

A: Introduction: For a population with N observations, x1, x2, ..., xN, the population variance is:…

Q: suppose you have two numbers with variance 9. what is the range of the this set

A:

Q: Th aim of a study is to test the ratio of variances in the weight of two groups of rats being under…

A: A confidence interval is an statistical concept that refers to an interval that has the property…

Q: To determine whether car ownership affects a student's academic achievement, random samples of 100…

A: It is assumed that the population variances are not equal.

Q: What is the function to got variance sigma 40?

A: Variance σ 2=1600                  σ =√1600  Standard deviation σ=40  In function form…

Q: a regression line of Y on X, the variable Y is know as random variable dependent variable…

A: The general form of the regression line is: Y^=a+bX Where ′Y^ is the predicted value, 'a' is the…