Which discrete distribution has a difference between their means and variances equal to zero?

Q: suppose that a coin is to be tossed four times and let X represent the number of tails that can come…

A: Given: A coin is tossed four times. X represents the number of tails. The objective is to find…

Q: Find the тean and variance of exponential distribution by direct method.

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Q: The random variable X has a uniform distribution with values between 11 and 21. What is the mean…

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Q: For normal distribution with a mean of 278 and a standard deviation of 25, what is the Z value for a…

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Q: The flying time of a drone airplane has a normal distribution with a mean of 4.76 hours and a…

A: Given ,         Meanu=4.76         Standard deviation σ=0.04

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: A sample of size 50 from a unimodal( one mode), distribution that is skewed to the right has…

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Q: A normal distribution has a mean of µ = 40 with σ = 8. If one score is randomly selected from this…

A: The following information has been provided:

Q: A baker knows that the daily demand for mango pies is a random variable that follows the normal…

A: Let "X" be the baker who knows that the daily demand for mango pies. To find z-value: Since the…

Q: The temperature of heated water is in a coffeemaker is a continuous random variable that follows a…

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Q: he results of a statistics examination follow an approximately normal distribution with a mean of 68…

A: Given data,Mean μ=68Variance σ2=64sd     σ=8P(X>82)=?

Q: The standard normal distribution can be used to calculate probabilities for a normally distributed…

A: Normal dist. has a bell-shaped curve.

Q: The number of traffic accidents per week in a small city has a Poisson distribution with mean equal…

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Q: What are the conditions for using a normal distribution to approximate a binomial distribution?

A: In probability distribution, the binomial distribution is a discrete probability distribution with…

Q: Determine the Binomial distribution for which the mean is 4 and variance 3 and find its mode.

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Q: A recent study of the hourly wages of maintenance crews for major airlines showed that the mean…

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Q: (2) The time it takes for a student to watch an IE342 video lecture is uniformly distributed between…

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Q: it be appropriate to use a normal distribution to approxi- mate the binomial distribution?

A: for normal distribution to approxiamte  the binomial distribution  np ≥10  and n(1-p)≥10

Q: In Normal distribution, the highest value of ordinate occurs at O Mean O Variance Same value occurs…

A: The question is about property of normal distribution

Q: In a bottling plant, the filling machine works properly when the variance of filling amount equals…

A: χ2 = (n-1)s2σ2

Q: The manager of a night club in Boston stated that 95% of the customers are between the ages of 22…

A: It is an important part of statistics. It is widely used.

Q: Can a normal distribution always be used to approximate a binomial distribution?

A: we can use normal distribution to approximate a binomial t

Q: Suppose the height of a certain population is normally distributed with mean of 158 cm and variance…

A: Given,mean(μ)=158standard deviation(σ)=16=4

Q: Can we find the area of the standard normal distribution using calculators only? If yes, How?

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Q: Derive the mean and variance of Bernoulli distribution. Show your complete solutions.

A: Bernoulli distribution is a type of discrete distribution. Based on the bernoulli distribution,…

Q: What is the median of a continuous random variable? What is the median of an exponential…

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Q: Supposed the price of paid apps for a certain category is normally distributed with the mean of $3.5…

A: Given that the  price of paid apps for a certain category is normally distributed with, Mean = 3.5…

Q: The time of a call to a technical support line is uniformly distributed between 2 and 10 minutes.…

A: Given information- We have given the problem of uniform distribution. Lower limit (a) = 2 minutes…

Q: The probability of failing to reject the null hypothesis when it is true is also called the…

A: here use basic of hypothesis testing

Q: If the z-value of a given x value is positive, it means that

A: The z-value of a given x value is defined as Z= (x - mean)/SD We know that standard deviation SD can…

Q: A random sample of size 16 is to be taken from a normal population having mean 100 and variance 4.…

A: Sample size = 16 Mean = 100 Variance = 4

Q: A normally distributed random variable has a mean of 140 and a variance of 2575. What is the…

A: μ = 140σ2=2575→σ = 2575 = 50.74

Q: Hello. Can I get help on how to work out this problem? If there is also a way to calculate using the…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: What probability with the average of nine randomly selected individuals from the normally…

A: Given: Population mean(μ)=48 Population variance(σ2)=64 Population standard deviation=σ=64=8 Sample…

Q: The customer demand of a product follows a Normal distribution. Given the standard deviation of…

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Q: Find the F-test statistic to test the claim that the population variances are equal. Both…

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Q: A geologist is making guesses about the mean length of fossil teeth of a certain species found in a…

A: From the provided information,

Q: Poisson distribution is applied for ___________

A: Here use basic of poission distribution

Q: if a distribution is normal, then it is not possible to randomly select a value that is more than 4…

A: It is given that the distribution is normal.

Q: An X random variable comes from any distribution with 21 averages and 17 variances. What is the…

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Q: when can a normal distribution be used to approximate a binomial distribution?

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials,…

Q: Assume the random variable X is normally distributed with mean 50 and standard deviation of 7.  What…

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Q: The random variable X has a uniform distribution with values between 15 and 25. What is the mean…

A: X follows Uniform distribution (15, 25)

Q: The random variable X has a uniform distribution with values between 13 and 21. What is the mean?…

A: Given,A random variable X~U(a=13 , b=21)f(x)=1b-a; a≤x≤bf(x)=121-13f(x)=18  ;  13≤x≤21

Q: Find Mode and Skewness of x2-distribution.

A: ANSWER: For the given data,

Q: ) What is the probability that the number of anomalies does not exceed the mean value by more than…

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Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A: Given that, A sample of final exam scores is normally distributed with, Mean = 20 Variance = 25

Q: If the mode of a normal distribution is 100 with variance equals 4, then the mean equals----

A: According to the provided informtion, mode = 100 variance =4

Q: What is the correct expression of the integral of the probability function of a normal distribution…

A: The Normal Distribution : 1. The normal distribution is symmetric with scores more concentrated in…

Q: If the value of x for normal distribution is 35, the mean of normal distribution is 65 and the…

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