Suppose that we have a normal population with mean 7 and standard deviation 4.   What is the probability that in an IRS of size 6,  the sample variance is at most 18?

Q: A population has a mean of 33 and a standard deviation of 5 . What is the probability that the…

A: Population mean=33Population standard deviation=5Sample size n=58

Q: For a population With a mean of 75 and a standard deviation of 12, what is the probability that a…

A:

Q: simple random sample comprised of the following data: 55, 23, 15, 6, 31. What is the point estimate…

A: Given that  Data -  55, 23, 15, 6, 31. Number of data values (n) = 5 Sum of data value = 55+…

Q: The monthly household income of a certain district in Manila is a normally distributed random…

A:

Q: The likelihood that a light bulb is defective is 5%, on a particular production line. Twelve light…

A: Answer: Using the given data, Let X denotes the number of defective light bulbs The probability of a…

Q: If a population has a mean of 15 and standard deviation of 3, what is expected of the sample mean…

A:

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

A:

Q: What is the random variable in this narrative

A: Claim is that the average number of weeks an individual is unemployed is 17.5 weeks.

Q: Random samples of size 64 are drawn from a population with mean 32 and standard deviation 5.Find the…

A: Given: Population mean, μ=32Population standard deviation,σ=5Sample size, n=64

Q: If the standard deviation of sample A  is 5 and the standard deviation of sample B  is 12, what is…

A:

Q: 5. A normal population has mean 200 and variance 49. How large must the random sample be if we want…

A:

Q: Suppose that we have disjoint normal populations A and B and we want to find the standard error…

A: Denote μ1, μ2 as the true averages of populations A and B, respectively.

Q: If a population has a variance of 12, what is the STANDARD DEVIATION of the sampling distribution of…

A: Variance=12  n=3

Q: If the population mean weight is increased to 100.15 lb, what is the probabilitythat the sample mean…

A: As per given by the question, what is the probability that the sample mean of weight of a sample of…

Q: What value is the probability that the mean of nine randomly selected individuals from a normally…

A: Sampling distribution of the sample mean x¯ ~ N(μx¯ , σx¯)

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: If the number of degrees of freedom for a chi-square distribution is 28, what is the population mean…

A: It is known that for chi-square distribution: μχ2=degree of freedom   So,μχ2=28

Q: If x represents a random variable with mean 137 and standard deviation 35, then the standard…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: If a set of 20 values has a variance of 9, what is the standard deviation of the set?

A: Given that n=20, Variance=9

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

A:

Q: If the standard deviation of a variable is 4​, what is the​ variance?   ​(This is a reading…

A: Given information: The standard deviation of the variable is 4.

Q: When the population is N=9 and the scores are 4,2,0,5,3,2,1,7,3 what is the SS, variance and…

A:

Q: Suppose you are conducting a hypothesis test to determine whether the mean of a normal population is…

A: Given The data is as follows: Sample size, n=100 Sample mean, x¯=29 Sample standard deviation, s=5…

Q: if the sample mean is 10, the population standard deviation is 20, and the sample size is 25, then…

A:

Q: Suppose that an accounting firm does a study to determine the time needed to complete one person's…

A: Given that  An accounting firm does a study to determine the time needed to complete one person's…

Q: If the standard error of the mean is σx̅ = 3 and the sample size is n = 64, then the population…

A:

Q: If a normal population has a mean of 20 and a standard deviation of 4, what is the z-value…

A: Given info: If a normal population has a mean of 20 and a standard deviation of 4.

Q: he number of times a customer uses an atm has an unknown distribution with mean = 7 and variance =…

A: The probability of observing a sample mean between 6.4 and 6.8 = 0.2184

Q: It is known that the population variance equals 522. What is the sample size that needs to be taken…

A: It is given that:

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A:

Q: What is the Discrete Variance when sample size is 82 with a probability of 0.82?

A: Formula for variance : Variance = np(1-p)

Q: One sample has n=7 and SS=35 and a second sample has n =17 and SS =45. What is the pooled variance…

A: Given information: The two sample statistics is given as, Sample 1 n1=7SS1 = 35 Sample 2 n2 = 17SS2…

Q: 2. The mean IQ of a sample of 1600 children was 99. Is it likely that this was a random sample from…

A:

Q: What is the standard deviation of a sample of 120 observations, if the variance of the sample 2.56?

A: It is given that the variance of the sample is 2.56.

Q: Suppose you have the population 50 and 80 and that their corresponding z-scores are -1 and -2,…

A:

Q: and assume that it has a Poisson distribution. What is the mean number of checks written per​ day?…

A: Consider X a  random variable that follows Poisson distribution and represents the number of checks…

Q: Suppose a population distribution has a mean  = 150 and a standard deviation s = 30, and you draw a…

A: Given: Mean = μ = 150 Standard deviation = σ = 30 n = 100

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.