If the variance of x is 4 then the variance of 3 + 5x is (a) 100 (b) 103 (c) 20 (d) 23

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: Assume that X and Y are two random independent random variables with mean 2 and 3 and variance 2 and…

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Q: Find P(X = 3), P(X = 6), P(X less than or equal to 3),

A: According to our guidelines we are solving only first three sub-parts of given question and rest…

Q: Which of the following statements is true about the Least Squares method of regression? The fitted…

A: Answer:-  Option A is right answer.

Q: 2. In the random effects model, the null hypothesis is about the variance of the effects of the…

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Q: You are running an Analysis of Variance to test if there is a difference in the average lengths of…

A: The problem relating to one way classification of ANOVA.

Q: If X is distributed as N(0,2), and Y = 3 + 2X. (a) What is the mean of Y? (b) What is the variance…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: Solve the two simultaneous equations to show how Q and P depend on u and v.

A: From given data we have; Demand:            Qd=β0+β1P+u ,Supply:            Qs=γ0+vMean:…

Q: 4(a). A fair four-sided die has the numbers 1, 2, 3 and 4 respectively on the four faces. Find the…

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Q: Let X and Y be identically distributed with mean 3 and variance 25. (a) If X and Y are uncorrelated,…

A: Let X and Y be identically distributed with mean 3 and variance 25 . Therefore, EX=3,  EY=3, VarX=25…

Q: You and a friend play a game where you each toss a balanced coin. If the upper faces on the coins…

A: Let  be the winnings price on a single play of the game.If both coins show tails, he wins .If both…

Q: Paired Samples Statistics Std. Error Mean N Std. Deviation Mean Pair 1 Errors after 8 hours sleep…

A: If we want to compare 2(+) groups on a quantitative variable, we usually want to know if they have…

Q: orms/d/e/1FAIpQLSfwjvZCJ6AjDdOt5bsxVgqr8s-ytVsd Tjfkgg TATxs9csBxtA/formResp The variance is equal…

A: Given data X:11,3,15,22,26,28,15,11,6,11,4,22,5 n=13 So, ΣX=179 ΣX2 =3327 Xbar =ΣX/n =179/13…

Q: : X1 195 210 260 330 X2 301 250 375 390 •Find the variance and standard deviation for X1 and X2…

A: Table for sample ( x1)  Observation: X1X1 X1^2X122 1 195 38025 2 210 44100 3 260 67600 4…

Q: Problem 5: Suppose that 70% of men and 30% of women in a state support the incumbent candidate of…

A: Number of men workers = 70% Number of women workers = 30% 500 people are surveyed at random

Q: Let X have a mean of 132 and a variance of 32. Define Y=X² + 2X+1. Compute the (a) mean and (b)…

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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: Experience has shown that a grade in MAT 2371 is normally distributed with mean 66 and variance 64…

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Q: The variance is equal to: Is The data below represents the ages of a sample of individuals who were…

A: Given data is 11,3,15,22,26,28,15,11,6,11,4,22,5sample size(n)=13

Q: What is the variance of this set: {x, x+1, x+5, x+2}

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Q: rationale for using n – 1 to compute the sample variance

A: we divide by 'n' to get the population variance.

Q: You and a friend play a game where you each toss a balanced coin. If the upper faces on the coins…

A: Here Given  two  balanced coin is tossed So Probability of tail=12=Probability of head Now Here…

Q: Why do we calculate sums of squares to find variance?

A: The sum of squares is an important term in statistics. The variance depends on the sum of squares .…

Q: Solve the two simultaneous equations to show how Q and P depend on u and v.

A: From given information we have given: The demand for a commodity is : Qd=β0+β1P+uWhere,Q denotes…

Q: What two regression inferences did we discuss in this section? What assumptions are required for…

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Q: Here is a POPULATION of scores: 4 2 3 2 1 29. What is the variance for this population of scores?…

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Q: Use this information to answer #19 - #23: A sample of 10 Psychology students at UNCP students were…

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Q: The Alpha Corporation manufactures two products, Mobile phones & Laptops. The average and the…

A: Let Z be the total cost of the Alpha Corporation. Then Z=2X+4.5Y+500 Average of total cost is…

Q: The higher the value of a², the larger the variance of B2 given in var(ß,) =

A: Given that The variance of the estimator beta2 is given  We have to descriptive the higher the value…

Q: e) Determine the mean and variance of W = 3X,-2X2+5

A: Given: Consider X1- Customer will spend more than RM50 at counter 1. It follows Binomial…

Q: What is the formula for the variance? o S? =E (x - X)? / n o S? = E (X - x)? /n o S2 = E (x - X) / n…

A: Variance is one of the measures of dispersion.

Q: EX = 22.5 Ex2 = 64.91 (X-Xbar )? = SSX 1.63 EY = 135 EY2 = 2595 E(Y-Ybar )2 = SSY = 316.88 ny=11…

A: Provided information is ; 1] For advertising expenditure (x) : sample size(nx) = 11 ∑x = 22.5 , ∑x2=…

Q: At a casino, one lucky player is blindfolded and allowed to pick 5 bills from a bowl containing 25…

A: Total number of bills is 25. Number of one hundred dollar bills is 6. 5 bills are drawn at random.

Q: If the variances of two random variables are 23 and 18, find the minimum and maximum possible values…

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Q: In a college,there are 20 major subjects and 40 minor subjects,these are divided into 20 groups of 2…

A: Probability is a branch of mathematics or statistics which is basically deals with the chances of…

Q: An analysis of variance produces SSbetween = 40, SSwithin = 60, and an F-ratio with df = 2, 15. For…

A: It is given that: SSBetween=40SSWithin=60df1=dfBetween=2df2=dfWithin=15

Q: (a) Among the next 210 customers, what are the mean and variance of the number who pay with a debit…

A: Consider the events A, B and C that represents the customers who pay with a credit card, debit card,…