A sample of n = 25 scores is determined to have a standard error of 2 points. what is the standard deviation for the population from which the sample was obtained?

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

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Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

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Q: Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard…

A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100 and standard…

Q: The population has a mean of 14 and a standard deviation of 3. The sample size of your sampling…

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Q: A sample of 169 is drawn from a certain population. This sample has a mean of 80 and a standard…

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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: A population has a stand. dev. of 24. on average, how much difference should there be between the…

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Q: A standardized test of intelligence is scaled so that the mean IQ is 100, and the standard deviation…

A: Given that information  Mean = mu= 100  Standard deviation = s =15  Zscore = (x - mu)/s

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

Q: The variance of a sample of 169 observations equals 576. what is the standard deviation of the…

A: Variance of a sample(s2)=576sample size(n)=169

Q: tal of 82 Grade 11 students of ABC senior high school took the 60 item test in General mathematics.…

A: To find the normal distribution with the mean 42 and standard deviation 6

Q: For a sample with a mean if M=63, a score of X=54 corresponds to Z= -0.75. what is the sample…

A: Given,Mean(M)=63a raw score(X)=54Z-score=-0.75

Q: The standard error of your estimate of the average height in the city is

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Q: A random sample of size 25 from a population gives the sample standard deviation to be 8.5. Test the…

A: In hypothesis testing, there are always two hypotheses viz. null hypothesis and alternative…

Q: Roland received a score of 70 on a test for which the mean score was 65.5. Roland has learned that…

A: Given Information: The score Roland received, X = 70. The mean score,μ= 65.5 Z score of the test =…

Q: If a population has a standard deviation σ , then the standard deviation of the mean of 100 randomly…

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Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

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Q: A normally distributed random variable has a mean of 449. If a score of 433 lies two standard…

A: Given: μ=449 A score of 433 lies two standard deviations below the mean, it means that, μ-2σ=433

Q: Assume the scores on a standardized test are known to follow a bell-shaped distribution with a mean…

A: Here,  Sample size =1250 Mean=90 Variance =9 Standard deviation =3 Empirical rule: 68% of the data…

Q: The population has a mean of 30 and a standard deviation of 6. The sample size of your sampling…

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Q: The standard deviation of SAT scores is 100 points. A researcher decides to take a sample of 500…

A: Given that SD = 100 Sample size n = 500

Q: If the scores on a test have a mean of 43 and standard deviation of 1.5, what is z score of 40?

A: In order to solve for the equivalent z score, we will use the z score formulaFormula:z =…

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.