If a sample size is 100 and the population standard deviation is 30 then the standard deviation of the sampling distribution for means is 3. Is this true or false.

Q: If a population has a mean of 228.8 and a standard deviation of 35.5 then a sampling distribution…

A: Given that, mean is 228.8 and standard deviation is 35.5. We will use z-standard normal…

Q: If the mean and standard deviation of a population are 40 and 2, respectively and the sample size is…

A: Dear student, If you find this solution helpful please upvote ? it.

Q: What distribution is used in this chapter to make inferences for one population standard deviation?

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Q: If the standard error (σX) of the mean distribution is 10 and the sample size is 25, then what is…

A: Given information Standard error of the mean distribution = 10 Sample size = 25

Q: or a distribution, the mean is 100 and the standard deviation is 4.  If a data value x has a value…

A: Given data,Mean μ=100sd σ=4If x=90z=?

Q: If the variance of a distribution is 16, the standard deviation is?

A: Solution: From the given information, the variance of a distribution is 16.

Q: From the empirical rule we can deduce that, for any distribution, 95% of the observations fall…

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

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Q: The standard deviation of the certain distribution is 9, what is its variance?

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: If the sample has standard deviation 2.1, what is a reasonable approximation to the range of this…

A: It is given that the standard deviation of the data is 2.1.

Q: Suppose that a study of elementary school students reports that the mean age at which children begin…

A: The provided information are: Population mean (µ) = 5.7 Population standard deviation (σ) = 1.2…

Q: The mean and standard deviation of a population are 200 and 20, respectively. Suppose samples of…

A: Given : μ = 200 , σ= 20 and n= 36

Q: Given a standard error of 5.2 with a sample size of 9. Then the standard deviation is

A: Solution: 4. From the given information, a standard error is 5.2 and n=9.

Q: If you want to be 99% confident of estimating the population mean to within a sampling error of ±20…

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Q: When testing a hypothesis about a single mean, if the sample size is 51 and the population standard…

A: From the provided information, Sample size (n) = 51 The population standard deviation is known.

Q: If the standard deviation, o is known the 2-distribution values may not be used to determine…

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Q: For a population of leghorn chickens, the mean number of eggs laid per chicken is 7.3 with standard…

A: Given information: μlegborn=7.3σlegborn=1.7μsussex=5σsussex=0.85 Two independent ransom samples of…

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

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Q: if the standard deviation of a sample is 0.5 find the variance

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Q: If the population standard deviation is σ=10, how large a sample is necessary to have a standard…

A: σ=10   The standard error is given by SE = σn n = (σSE)2

Q: Suppose that among the population of smartphone owners with 16GB of storage, the mean amount of…

A: From the provided information, Mean (µ) = 13 GB Standard deviation (σ) = 3 GB

Q: Why is pooled standard deviation a better estimate of σ than the standard deviation from any other…

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Q: Suppose a population that has mean 90 and standard deviation 20. How many observations, n, should…

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Q: A population is normally distributed and has a mean of 50 and a standard deviation of 5 If we…

A: As we know the empirical rule of 68 - 95 - 99.7 that is the percent value that are one, two or three…

Q: Suppose that the variance of a hypothetical population is 49. What is the standard deviation?

A: Solution : Given : σ2 = 49 The variance of the population is denoted by σ2 and standard deviation is…

Q: The standard deviation of the sample mean is less than the standard deviation of the population.…

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Q: If the true mean is .9560 with a standard deviation of .0020 what is the sampling distribution of X

A: if the true mean is 0.9560 with a standard deviation of 0.0020 i.e.  μ=0.9560  and σ = 0.0020

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

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Q: Given that the population standard deviation equals 273 and the sample size consists of 741…

A: Given information- Population standard deviation, σ = 273 Sample size, n = 741 We have to find the…

Q: For a population with a mean of 45 and a standard deviation of 10, what is the standard error of the…

A: Obtain the value of standard error for the sample of size n=4 scores.   The value of standard…

Q: If the population standard deviation is unknown, then we could use the sample standard deviation to…

A: We have given that the statement about the standard error of the mean. The formula of standard error…

Q: If the Standard Error SE( y ) is 1.299 and if the sample standard deviation is 4.87, what is the…

A: It is given that S.E(mean) = 1.299 Sample SD s = 4.87

Q: Suppose the variance of a sample is 7.3. Find the standard deviation. Round to two decimals.

A: Given : Variance , s2 = 7.3

Q: In a standardized exam the mean score is 400 with a standard deviation of 50. If a random sample of…

A: Given that  μ= 400 , σ= 50 , n = 25

Q: the standard deviation for the sample distribution of mean is called?

A: Given: To find = the standard deviation for the sample distribution of mean is called ?

Q: If you draw a sample of size 10 from a population of size 35 with a population mean of 83.4 and…

A: In question, Given that you draw a sample of size 10 from a population of size 35 with a population…

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: The standard deviation of the distribution of sample means would be equal to:

A: The standard deviation of the distribution of sample means would be equal to ?

Q: In general, the standard error of the sampling distribution is __________the standard deviation from…

A: We know that, Standard error is given by, SE= sigma/√n Where sigma is standard deviation and n is…

Q: If the sample size is 100 and the population standard deviation is 20, then the standard deviation…

A: Given  True or false question Sample size=100  Population standard deviation=20  We need to…

Q: A science teacher claims that the mean scores on a science assessment test for fourth grade boys and…

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Q: If the sample size is 100 and the population standard deviation is 40, then the standard deviation…

A: We have given that,  Population standard deviation (σ) = 40 and sample size (n) = 100 Then,  We have…

Q: Suppose the variance of a sample is 5.7. Find the standard deviation. Round to two decimals.

A: According to the given information, we have Variance = 5.7

Q: So, if you were a researcher and you desired a small standard deviation of sample means (a "skinny"…

A: The standard deviation of sample mean is:        = ​σ​/√n,     where n is the sample size

Q: If the sample size is 100 and the population standard deviation is 20, then the standard deviation…

A: Standard error:The standard deviation of the sampling distribution of the mean is called standard…

Q: The standard deviation of a sample is 3.0 and the standard error is -16.52, what was the original…

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Q: If the standard error of the sample mean is 5, for samples of size 25, what is the popu lation…

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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.