Find the (a) mean (b) variance

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: 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: Six percent of U.S. employees who are late for work blame oversleeping. You randomly select four…

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Q: The sample variance, ² = Σ(x-x)² n-1 {14, 13, 16, 9, 3, 7, 11, 12, 11, 4} is I of the data

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Q: What is the variance? 3.7 4.1 3.2 4 3.8 3.6 3.7 3.4

A: Given:The data values are as follow:3.7, 4.1, 3.2, 4, 3.8, 3.6, 3.7, 3.4

Q: A project has estimated optimistic (a), most likely (m) and pessimistic (b) times for activity D as…

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Q: Given a binomial variable with a mean of 30 and a variance of 21, what is p?

A: X~Binomial(n , p) Mean=30, Variance=21

Q: A flood-control system is designed such that the probability of the system capacity being exceeded X…

A: Given information: The table below shows the probability that in 30 years, the system capacity will…

Q: The probabilities that a customer buys 1, 2, 3, 5, 8 apples each day in a grocery store are 0.20,…

A: Given information- We have given the probability distribution for customer who buys apples each day…

Q: A pharmaceutical company has developed a drug that is expected to reduce hunger. To test the drug,…

A: Given that there are 3 samples of rats with n=15 in each sample. That is, k=3 and n=15…

Q: and second components meet specifications are 0.96 and 0.89, respectively. Let X be the number of…

A: The random variable X defines the number of components in the assembly that meet specification.

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: 1 example of mean and variance

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Q: 70 vi=1 Xi 1406, Σο1x. = 29042 i=D1

A: From the provided information,

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: Suppose that the weight of a particular hand weight is advertised to be 5 pounds, but it can…

A: Answer  Given  Mean = 5 Minimum value = 4.5 Maximum value =5.1 We know that: Variance = [Range/4]^2.

Q: r the data above, what is the pooled variance? (Hint: you must first find the variance for each )

A: Given : For  group A given data : 12,10,7,7,8,5

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: Suppose the probabilities that there will be 0,1,2, or 3 power failures in San Jose, CA in July are…

A: Solution: a. Let X be the power failure. From the given information, Then, the mean number of…

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: Describe Decomposition of the variance in Y?

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Q: Expected value  b Variance c Standard Deviation

A: Here prepare probability table with required column

Q: An alternative hypothesis must include the anticipated direction of variance. True  False

A: We have given statement  "An alternative hypothesis must include the anticipated direction of…

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

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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: Thirteen percent of U.S. employees who are late for work blame oversleeping. You randomly select…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: If the F-statistic is large, then they variance ___ is much larger than the variance ___.

A: We have given that,  If the F-statistic is large, then they variance ___ is much larger than the…

Q: What is the variance of the time it takes to change the oil? Keep two digits after the period. So,…

A: Given: Mean μ = 5 minutes. Formula used: Exponential distribution: X~Exp(λ) λ = 1μ Variance σ2 = 1λ2…

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: Complete parts (a) and (b) below. The number of dogs per household in a small town Dogs Probability…

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Q: The r2represents the shared variance between a predictor and _______

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Q: A two-factor, independent-samples design is evaluated using an analysis of variance. The F-ratio for…

A: Given information: A two-factor, independent-samples design is evaluated using an analysis of…

Q: xplain in a sentence what a certain Cohen’s d means.   Explain in a sentence what a certa

A: solution:

Q: Find the mean and variance from the m. g.f.of binomial distribution.

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Q: nsider the following data: x 3 4 5 6 7 P(X=x) 0.2 0.1 0.2 0.1 0.4 Step 2 of 5 : Find the variance.…

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Q: The expected value of a random variable X that is denoted by u is called its a .variance b.mean C.…

A: The expected value of a random variable X that is denoted by u is called its ?

Q: Find the variance for the binomial distribution, P=0.87 and n= 32

A: Answer: From the given data, P = 0.87 n = 32 X follows binomial distribution (n,p)

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