Suppose bob flips a fair coin 100 times.Let X be the number of heads he gets.What is Variance of X?

Q: Suppose you have 5 batteries, B1, B2, B3, B4, and B5, with two of them depleted. You decided to test…

A: To address the problem, the objective is to understand the distribution of X, the random variable…

Q: Suppose that the random variable X represents th If E(X) 9 and V(X) 0.25, wh millimeters. Meani…

A: Let X be a random variable that represents the length of a punched part in the centimeters.Let Y be…

Q: A variable with a population average of 50 and a variance of 100 is likely to have an average…

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Q: ir there is claim that the variance of sales is defferent from 39. A sample of 29 is chosen, the…

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Q: A population has SS - 100 and variance, o-4. What is the value of EX - jal for the population? O 100…

A: given that ss of population=100 variance σ2 =4 σ2= [Σ(x-μ)2]/N where N is number of data

Q: The probability of a defective product produced in a production process is 0.26. What is the…

A: From the provided information, The probability of a defective product produced in a production…

Q: Suppose X has finite variance. Let Y = |X|. Does Y have the same, a smaller, or a larger variance…

A: Given that X has finite variance i.e. var(x)<∞ Let Y =|X| that means Y can take 2 values i.e. X…

Q: Suppose that average male weight in the US is 175 pounds with a standard deviation of 25 pounds.…

A: It is given that population mean µ=175 pounds, population standard deviation σ=25 pounds. Sample…

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: Assume the probability that a maple tree at age 5 grows less than 150 cm is equal to 0.3. If the…

A: Given Data: Let X represent the height of the maple tree P(X<150)=0.3 σ=64=8

Q: Four dice are rolled. Let X; be the value of the ith roll. Let Y = X1X2X3X4 be the product of the…

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

A: L

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

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Q: Suppose that the random variable X measures the number of hot dogs purchased in a food court in an…

A: CorX,Y=0.75VX=VY=36W=2X+3Y

Q: State the properties of Co- variance;

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Q: 26 - Find the variance Varyansı bulunuz. Si f 2 4 4 7 6 3

A: The variance is calculated as σ2=∑f(si-s¯)∑fs¯=∑fsi∑f

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: 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: In a 25-Question multiple-choice, there are five possible answers of which one is correct. Let X:…

A: X=number of correct answers  n=number of trials=25 p=probability of success= 1/5 =0.2 [because each…

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: very day Roscoe G. Maples flips a fair coin four times and if it is heads all four times, he gives a…

A: Given that  Every day Roscoe G. Maples flips a fair coin four times.  If it is heads all four times,…

Q: If the maximum 1.3, п %3D 150, аnd %3D Zo.005 = 2.575, then find the variance variance 6.2. О %3D…

A: Given,n=150Z0.005=2.575maximum=1.3

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: O With a one-unit increase in fresh food, satisfaction will increase by .523. O Fresh food…

A: The dependent variable  is satisfaction.The independent variable  is Fresh food.The equation of…

Q: Suppose the variance of X is 33. What is the variance of .23X?

A: Given,Var(X)=33 we know that Var(ax)=a2Var(X)

Q: Consider throwing a die 20 times. Let X be the number of times th outcome is less than 3. Find the…

A: Given that  n=20  , p=2/6=1/3 , q=1-p=1-(1/3)=2/3 X=Number of times the outcomes less than 3…

Q: Enter the decision rule. Reject Ho if z > _______

A: The claim of the test is, that the medicine relieves pain in more than 340 seconds indicating the…

Q: For a binomial variable X if n = 21 and p = 0.5. Find the variance?

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Q: An urn contains 7 black and 16 white balls. A ball is to be drawn randomly from the urn. Let X= 1 if…

A: Black balls= 7 White balls = 16 Total balls= 7+16= 23  Probability of getting black balls= 7/23…

Q: Assume that you walk in a park, and there are 5 types of flowers in the park. You pick at random 1…

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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: The salaries of physicians in a certain speciality are approximately normally distributed. 25% of…

A: Suppose the random variable X defines the salary of a randomly selected physician.It is given that,…

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: The variance of 19, 21, 23, 25 and 27 is 8. The variance of 14, 16, 18, 20 and 22 is: a. Greater…

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Q: A candy company produces packets of candy every day. Each packet they produce has a slightly unique…

A: Mean = u = 74g Variance = 13g O = √variable =√13 = 3.6 Z = -0.2

Q: The formula for total variance (SST) is

A: Solution:-

Q: Suppose that you have a hat that contains slips of paper. Each slip of paper has a single number…

A: The question is about discrete probability distribution.Given :Each slip has number from 1-5 written…

Q: Suppose that the random variable X represents the length of a punched part in centimeters. Let Y be…

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Q: a. Determine b. Determine C. Determine d. Determine the mean of x the mean of Y the variance of X…

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.