Question 47 Suppose for a binomial distribution, variance of the variable is 4. The probability of success is 3/4. Find the mean of this distribution and value of n.
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A: We have given that Mean(µ) = 125Standard deviations (σ) = 28.7
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Q: Suppose Y follows binomial distribution with mean =10 and variance of 7, what is the value of the…
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Q: Find the mean and variance of the numbers generated by rolling two die and counting the sum of the…
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Q: If n =41 and p=0.6 then the variance of the binomial distribution is
A: X~B(n,p)P(X=x)=nxpx(1-p)n-x x=0,1,2,3,...,nE(x)=mean=npvariance=np(1-p)
Q: 1. If the random variable X from a distribution with mean 50 and variance 10 and y = 0.8x + 15. Find…
A: It is an important part of statistics. It is widely used.
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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
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Q: a(n). . . test ...... To test the equality of two variances, you would use Chi-square
A: We will F test to test the equality of two variances.
Q: Example 5 Mean of a binomial distribution is 20 and the variance is 16. Calculaten, pandq
A: Given;X~binomial(n,p,q)and Mean=20 i.e. np=20 variance=16 i.e. npq=16
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A: The variance of the sample can be calculated as:
Q: variable Y is twice th
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Q: The variance of a probability distribution is its second moment about the mean. True or False
A: Given statement: The variance of a probability distribution is its second moment about the mean.
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A: Given,sample size(n)=39standard deviation(σ)=36=6mean(μ)=31
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: i n =49 and p=0.6 then the variance of the binomial distribution is а. у 29.40 O b. 0.90 О с. 58.80…
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Q: Fourty percent of the students in a class of 120 are planning to go to graduate school Find the…
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Q: An analysis of variance produces SSb=35,SSw=15 and a F ratio with the df=1,5.What is the F ratio?
A:
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 researcher uses an analysis of variance to test for mean differences among three treatments with a…
A: According to the given information, we have Given that a researcher uses an analysis of variance to…
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Q: Determine the binomial distribution for which the mean is 4 and variance 3 and find its mode.
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Q: Suppose that X is a random variable with probability density function given by: fx (x) = { k(x³ +…
A: To find k k∫02(x3+x) =1kx44+x2202 =1k164+42 =1k=16
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- Express variance of a variable X in terms of conditional variances.Mensa requies a test score to be in the top 2%. The test has a mean of 100 and Std. Dev. of 15.and scores are normally distributed. If 4 subjects take the test and they have a mean of 132 but the individual scores are lost, can we conclude that all 4 of them are eligible for Mensa?If Y is a random variable from an exponential distribution with a mean of 5; what is the probability that Y is more than 7?
- Fourty six percent of the students in a class of 120 are planning to go to graduate school, Find the variance of this binomial distributionsuppose the mean is 8 and 1/3 and the population variance is 6 and 8/9 and a>9 x 5 9 a frequency 3 f 2 a=? f=?Question 5 > About 62% of people who are murdered knew the person who committed the murder. Suppose that Detective Moore's case load currently has 50 unsolved murders. Use a normal distribution approximation to the binomial distribution to find the following probabilities: a. What is the probability that no more than 28 of the victims among Detective Moore's case files knew their murderer? b. What is the probability that between 28 and 34 of the victims knew their murderer?
- What is the mean and variance of a variable that follows the binomial distribution? How would you calculate this?Suppose Y = 6x-8, where x is a random variable with mean 2 and a variance of 4/3. Determine the variance of the random variable yFrom the past experience, 30% of the stocks are profitable. What is the probability that 5 of the 7 stocks are profitable? Find the mean and standard deviation of the random variable X, where X is the number of profitable stocks out of 7.
- P and A are independent, random variables. mean of P is 5 and its standard deviation is 3. mean of A is -2 and standard deviation is 6. what is mean of T= - 3P + 20 ? what is the mean of W= A - P? what is variance of D= P - 2A ?The owner of a farmer's market was interested in determining how many oranges a person buys when they buy oranges. He asked the cashiers over a weekend to count how many oranges a person bought when they bought oranges and record this number analysis at a later time. The data is given below in the table. The random variable x represents the number of oranges purchased and P(x) represents the probability that a customer will buy x oranges. Determine the variance of the number of oranges purchased by a customer. Round to two decimal places. X P(x) 1 0.05 O A. 0.56 OB. 3.97 OC. 3.57 OD. 1.95 2 3 0.19 0.20 4 5 0.25 0.12 6 0.10 7 8 0 0.08 9 10- 0 0.01A researcher uses analysis of variance to test for mean differences among three treatments with a sample of n=12 in each statement.The F-ratio for this analysis would have which df values? df=2,11 df=2,33 df=2,35 df=2,36