Find the expected frequency, E;, for the given values of n and p. n= 150, p, = 0.5 E; =D !!

Q: A sample of n = 4 scores with M = 43 is selected from a normal population with u = 40 with o = 8.…

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Q: In a study of births in 2007, it was found that 51% were male and 49% were female. If 100 people are…

A: Given that there are 51% are male and 49% are female & if 100 people selected randomly we have…

Q: 1. Describe the distribution of sample means (shape, expected value, and standard error) for samples…

A: Solution: Given information: n=100 Sample size μ=40 Population Meanσ=10 Population Standard…

Q: A researcher hypothesizes that freshmen, sophmores, juniors, and seniors are represented equally…

A: It is given that the total number of volunteers is 40.

Q: If t-test is 2.23 and the sample size is 15, for a one-tailec (upper tail) the probability value is…

A: Given: Sample size (n) = 15 Test statistic (t) = 2.23

Q: A researcher hypothesizes that freshmen, sophomores, juniors, and seniors are represented equally…

A: We have given sample size, n = 40 We have to find the expected frequency for freshman- Here we have…

Q: A sample of 25 observations is taken from an infinite population with a mean of 45 and a standard…

A: It is given that the mean of an infinite population is 45 and standard deviation is 10. The sample…

Q: A sampie of size n=90 is drawn from a population whose standard deviation is o = 12.

A: Given,standard deviation(σ)=12sample size(n)=90α=1-0.99=0.01α2 =0.005z0.005 =2.58

Q: You flip an unfair coin with Pr[H]= 0.4 three times. Find the expected number of heads flipped.

A: Given that flipping an unfair coin 3 times with PrH=0.4.

Q: Assuming that the group of students with a grade arithmetic mean of 70 and a standard deviation of…

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Q: The uniform distribution of a random variable X is given in the figure below. 1 2 From the figure,…

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Q: According to a Harris Interactive survey conducted for World Vision and released in February 2009,…

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Q: If X is a Weibull random variable with B = 1 and S = 1402, what is the mean of X? Mean = i

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Q: 1.  Assume that thermometer readings are normally distributed with a mean of 0 degrees C and a…

A: Given: Let X denote the thermometer readings.  The random variable X is normally distributed with…

Q: d. a simple random sample of 40 auto insurance policies, find the probability that the average cost…

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Q: You flip an unfair coin with Pr[H] = 0.3 three times. Find the expected number of heads flipped.

A: Let X= number of head  n=total number of observation = 3 p = probability of getting a head= 0.3 So,…

Q: A sample of n 12 scores is selected from a normal population with u = 50 and o = 10. a. What iš the…

A: Given that, Mean = 50 Standard deviation = 10 Sample size = 12

Q: A random sample of n = 64 scores is obtained from a normal population with u = 30 ando = 10. What is…

A: Givensample size(n)=64Mean(μ)=30standard deviation(σ)=10

Q: Assume that the random variable X is normally distributed, with mean µ = 50 and standard deviation o…

A: Given: Population Mean,μ = 50 Population Standard Deviation,σ = 7

Q: Choose... 1/6 Given that a die is tossed and has 2.7 data : 2.8 1.64 1.71 х 1 2 3 4 5 6 3.4 P(x) 1/6…

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Q: if Z is a standard normal variable, find the probabilitythe probability that Z is greater than -1.82

A: Conclusion: The required  probability that Z is greater than -1.82 is 0.9656.

Q: Find E(X), Var(X), and the standard deviation of X, where X is the random variable whose probability…

A: According to given data: The value of E(X): EX=149+249+319EX=49+89+39EX=159EX=1.66

Q: In a hypothesis test, which of the following will cause a decrease in B, the probability of making a…

A: When the type I error (α) increases, the size of the critical region and the probability of making…

Q: A random variable X has the probability distribution given in the following table: 2 3 4 5 6 P(X =…

A: When random variable X has the probability distribution then sum of the probabilities must be equal…

Q: You flip an unfair coin with Pr[H] = 0.3 three times. Find the expected number of heads flipped. 田

A: Expectation =Mean value  Since the coin is tossed three times head can come at 0 time ,1 time ,2time…

Q: You flip an unfair coin with Pr[H] =.2 three times. Find the expected number of heads flipped.

A: Probability of head appear is 0.2.

Q: Given a random variable X having a normal distribution with population mean=40 and standard…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: Assume the average price for a movie is ​$7.35. Assume the population standard deviation is ​$0.44…

A:

Q: Assume that, for a given test, the population mean is µ=50 and the population standard deviation is…

A: Mean = 50 Standard deviation = 10 Sample size, n = 25

Q: 5% of all tires produced by company A has defect. What is the probability that the first defect is…

A: Let X be a random variable such that X: Number of defected tires detected X~Bin20, 0.05

Q: if the probability distrobution for the random variable X is given in the table  what is the…

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Q: 1. Given that X is a normal random variable with the mean of 15 and standard deviation of 3, compute…

A: We have given that a random variable X that follows normal distribution with mean 15 and standard…

Q: Assume that, for a given test, the population mean is µ=50 and the population standard deviation is…

A: given: Population mean (μ)=50 Population standard deviation (σ)=10 Sample mean (M)=54 Sample size…

Q: Let a random variable X has an exponential distribution with a mean of 10. (a) Compute P(-10-10 or…

A: The mean of the exponential distribution is 10.

Q: Find the standard deviation for each binomial random variable  n=36, ?= .75 n=75, ?= .55 n=26, ?=…

A: Givenn=36 p=0.75x~Binomial(n=36,p=0.75)P(X=x)=(nx)×px×(1-p)n-x    ; x=0,1,...,n

Q: The probability of the sample space S is always less than 1. Select one: O True O False

A: The answer is : False. Explanation: A sample space is a collection of all possible outcomes of a…

Q: A hospital researcher is interested in the number of times the average post-op patient will ring the…

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Q: The uniform distribution of a random variable X is given in the figure below. 1 From the figure,…

A: We have to find out given probability..

Q: Calculate Pr(d) for d = 1, 2, . , 9, check that the sum of all probabilities is one, and graph the…

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Q: The random sample X is normally distributed with mean 50 and standard deviation 18. If n=324,…

A: Since, the parent population follows normal distribution, the sampling distribution of the sample…

Q: 2. The IQ scores of children in a special education class are normally distributed with u = 95 and o…

A: Given information is ; Population mean ( μ) = 95 Population standard deviation ( σ) = 10 assume that…

Q: The random sample X is normally distributed with mean 50 and standard deviation 18. If n=324,…

A: Solution: From the given information, X follows normal distribution with a mean µ=50 and a standard…

Q: If random variable X takes on the values of -1,0 and 2 with probabilities 0.3, 0.3, and 0.4…

A: It is given that the, The random variable X takes the values of -1,0 and 2 with probabilities…

Q: Determine the indicated probability for a binomial experiment with the given number of trials n and…

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Q: In which probability distribution would a random variable XX have E(X)=λE(X)=λ?

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Q: Assume that the random variable D follows the Normal distribution. For the sixth and seventh groups,…

A: Consider, the mean and standard deviation values for the given values: Consider, the expected…

Q: Two chips are drawn at random from a bowl containing 2 white and 3 red chips. Let ?=X=the number of…

A: Assuming chips are drawn without replacement, X is the number of red chips drawn. The all possible…

Q: Suppose that 20,000 married adults in a country were randomly surveyed as to the number of children…

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

Q: For a particular population, a sample of n = 4 scores has an expected value of 10. For the same…

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