1. What are the characteristics of normal random variable?

Q: Question: What is the difference between a discrete and a continuous random variable?

A: Introduction: Random variables are mathematical functions that associate numerical values with…

Q: Anticipated consumer demand in a restaurant for free -range steaks next month can be modeled by a…

A:

Q: Distinguish discrete random variable from continuos random variable and give three examples for…

A: Given: Discrete random variable Continuous random variable

Q: Anticipated consumer demand in a restaurant for free -range steaks next month can be modeled by a…

A: Let X be the Anticipated consumer demand in a restaurant for free -range steaks next month can be…

Q: 1. We assume two people have the same distribution. For these people, we assume also that losses are…

A: Step 1: Calculate the expected value.A discrete probability distribution is a statistical concept…

Q: Find the 4 -th percentile for the standard normal random variable Z. The 4 -th percentile for Z is…

A: The problem is asking us to find the 4th percentile of a standard normal distribution. The standard…

Q: Q3 One computer exam center lost partial user profiles. There are three tests which miss the…

A: Part (1) The table corresponding to the arrangement of the score and the number of users get the…

Q: How many standard deviations away from the mean is a CD player that lasts 8 years? What is the…

A: Given Information: Mean μ=7.1 Standard deviation σ=1.4

Q: Write the important properties (characteristics) of normal distribution and normal probability…

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Q: 15. Which is a discrete random variable? X = "weight of the microprocessor inside your computer" Y =…

A: The random variables X,Y and W are just weight, height and time respectively. So they can take any…

Q: What is the probability of randomly selecting a z-score less than z = +2.25 from a normal…

A: Z=2.25  P(Z<2.25)= ?  Note: This probability value calculated from standard normal distribution…

Q: Explain the term Random Variables? Define discrete & continuous random variables?

A: Random variable: A random variable, usually denoted as X, is a variable whose possible values are…

Q: Let X be a chi-squared random variable with 23 degrees of freedom. What is the probability that X is…

A: Given,degrees of freedom (d.f)=23

Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, μ, of…

A: There are two types of errors that occurred in the hypothesis testing. They are: Type I error Type…

Q: 04 - Consider a standard normal random variable, z. Find the following probabilities: a. P(z> 1.64)…

A: The standard normal distribution is one of the continuous probability distributions in the…

Q: variable with 31 degrees of freedom. What is the probability that X is less than 25?   and    Let X…

A: It is an important part of statistics. It is widely used.

Q: The number of calories in a salad on the lunch menu is normally distributed with mean = 100 and…

A: Given data,Mean μ=100variance σ2=16standard deviation σ=4

Q: If X is a random variable, what is the difference between a sample mean of measurements of X and the…

A: Given Information: X is a random variable. The mean of a sample is the average of the data values in…

Q: It is the measure of association between two random variables obtained as the expected value of the…

A:

Q: What is the expected value of a continuous random variable? What is the expected value of an…

A: Definition used:

Q: Soft drink cans are filled by an automated filling machine. The mean fill volume is 12.1 fluid…

A: GivenMean(x)=12.1standard deviation(σ)=0.05n=10

Q: The amount of time it takes an Intro to Statistics instructor to grade an individual exam is a…

A: Given that Sample size (n)=64  Population mean μ=3  Standard deviation σ=1 Let X denotes the amount…

Q: What increases the likelihood that our a random sample will be representative of the population? O…

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Q: Aboxof1000ticketshasanaverageof40andastandarddeviationof10.Two hundred and twenty-five draws will be…

A: Let X represents the number of draws.  It is given that,  Sample size is n= 225  Population mean, u=…

Q: which of the following random variables isn't discrete? (a) the number of children in a family (b)…

A: Since we know that A discrete  random variable is a variable thatcan be counted.while on the other…

Q: Let W be a random variable giving the number of heads minus the number of tails in three tosses of a…

A:

Q: What a-score corresponds to the top 15% of any normal random variable? 0.4401 -1.04 0.8023 1.04

A: The top 15% of any normal random variable can be calculated as:…

Q: Average value is always an expected value.

A: Both the average value and expected value are the same term but the average is generally referred to…

Q: Consider a statistical experiment where you flip two coins and you are interested in how many heads…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 1.) How do you know when to use the binomial distribution to model a situation? 2.) what does a Z…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: True/False: Answer the questions below by selecting "true" or "false". If the answer is false in the…

A: We know that, Discrete random variable: The random variable which gives the values  countable and…

Q: ) What are the chances that the investment will result in a negative return? ii) What is the…

A: mean = 15 sd = 10

Q: What is the probability of randomly selecting a z-score greater than z = -0.75 from a normal…

A: Let Z be a standard normally distributed random variable with mean 0 and standard deviation 1.

Q: What are the expected value and the standard error of the sample proportion ?̂, if the true…

A: Givenpopulation proportion(P)=0.2sample size(n)=90

Q: Two new machines for producing tires have been proposed by a worker in a manufacture. The…

A:

Q: The standard deviation is also called the expected value. True

A: we have to identify the statement is true or false ?  statement : The standard deviation is also…