What is the variance of a data set with mean score of 87.5 and a standard deviation of 2?
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Q: The spread or dispersion of a set of data about the mean will be large if the standard deviation is…
A: Solution
Q: How are the standard deviation and variance related to each other?
A: Hi! Thank you for posting the question. Since you have posted multiple questions, we are answering…
Q: Why is the standard deviation used more frequently than the variance as a measure of variability?
A: The standard deviation and variance, are measures of dispersion (variability). The relation between…
Q: what percent of the data falls within 2 standard deviations of the mean?
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Q: For normally distributed variables, approximately what percentage of values fall within two standard…
A: Given a normally distributed variable X. Let us assume its mean is µ and standard deviation…
Q: If the Standard Deviation of a data set is 2.1, what is the variance of that data set? State your…
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Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…
A: It is given that the mean is 10,000 and the standard deviation is 10.
Q: The Sum of Squared Errors for a data set of 18 numbers is 36. What is the standard deviation?
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Q: What does having a higher standard deviation means?
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Q: What is the value of the standard score for the mean of a distribution
A: The standard score is the same as the Z-value. This is the distance of any data value, measured in…
Q: What is the mean, standard deviation and variance of the time the subjects stayed balanced?
A: We have given that, The data of 8 females. The balance times data is, 34, 38, 29, 23, 33, 28, 32,…
Q: Why is the range much less informative (and much less useful) as a measure of variability than the…
A: Solution-: The problem with using the range as a measure of variability is that it is completely…
Q: What is the standard deviation (spread from mean) of the dot plot?
A: Introduction: Taking the mean of the data points, removing the mean from each data point separately,…
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: Approximately what percentage of normally distributed data values will fall within 2 standard…
A: It is known that, normal curve is a symmetric and bell shaped distribution.
Q: Does a small standard deviation signify more or less uncertainty in the data ? Explain.
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Q: What is the standard deviation of the data?
A: We want to calculate standard deviation
Q: 1. If the standard deviation of a data set is 4. What is the variance?
A: As per our guidelines we are supposed to answer only one question per post so I am solving first…
Q: what is its distribution, its mean and its variance?
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Q: Illustrate the mean or expected value, variance and standard deviation
A: given: x f xf (x- x )2 f*(x- x )2 4 1 4 25 25 5 2 10 16 32 8 2 16 1 2 10 2 20 1 2 13 2…
Q: What is the difference between standard deviation and mean?
A: Standard deviation: The standard deviation is based on how much each observation deviates from a…
Q: Approximately what percentage of normally distributed data will fall within 2 standard deviations…
A: Based on the Concept of Empirical Rule: About 68% of the area under the curve falls within 1…
Q: The variance of a sample of 99 observations equals 81. The standard deviation of the sample equals?
A: From the provided information, The sample variance of 99 observations (s2) = 81
Q: . A distribution has a coefficient of variation of 65% and mean of 47. What is the value of the…
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Q: If the variance of a national accounting examination is 828, how large a sample is needed to…
A: Given data: Variance = 828 Margin of error = 4 points Confidence level = 99 % To calculate the…
Q: What are the best ways to find the standard deviation?
A: Standard deviation is a measure of variability. It describes how far the data falls from the…
Q: How does one calculate the standard deviation?
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Q: Explain an important difference between the standard deviation and the mean.
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Q: How is standard deviation a measure of distance?
A: We know that the standard deviation is the measure of the dispersion of data which is based on…
Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…
A: -2 standard deviation is given by, (Mu-2sigma)= 70 Mu+2sigma= 100 Where mu is mean and sigma is…
Q: What is the range of the distribution? What is the value of the variance of the data set? What is…
A: We have to calculate the range, variance and SD of given dataset. Range = Maximum - minimum And SD…
Q: What is the standard error of the mean and how is it different than the standard deviation?
A: Let us consider that we have taken k random samples each of size n from a certain population: Sample…
Q: What us the variance of a distribution having a standard deviation of 5.26?
A: Given, standard deviation=5.26 find variance=?
Q: The standard deviation of a sample of 100 observations equals 64. The variance of the variance…
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Q: What relation exists between the average deviation of the mean?
A: Note: Hi there! Thank you for posting the question. As your question is not clear, as per the…
Q: korynn is calculating the variability in her data by measuring the average distance of scores from…
A: Given: korynn is calculating the variability in her data by measuring the average distance of scores…
Q: The hotel room rate in Miami, Florida is normally distributed with a mean of $286 per night. Assume…
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Q: Do researchers prefer to report the variance instead of the standard deviation because it is easier…
A: No, researchers prefer using standard deviation because standard deviation is in the same units as…
Q: What is the z score for 120 when mean is 100 and standard deviation is 5.
A: We have to find z score for 120 when mean is 100 and standard deviation is 5.
Q: The Variance for a set of scores is 36, what is the standard deviation, what is the range?
A: Given, variance = 36Therefore, Standard deviation = square root of variance…
Q: The variance of a sample of 81 observations equals 64. what is standard deviation of the sample ?
A: Given data ,no of samples n=81Variance σ2=64Std. deviation σ= ?
Q: The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals
A: Givenvariance(σ2)=576
Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…
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Q: Explain about the standard deviation Actually Exceeds Mean Deviation?
A: Measures of Dispersion: The word dispersion is used to denote the degree of heterogeneity in the…
Q: IF THE VARIANCE OF A POPULATION IS 0.75, THE STANDARD DEVIATION MUST BE?
A: It is an important part of statistics . It is widely used .
Q: Explain the difference between variance and standard deviation? how it is calculated?
A: Variance Standard Deviation It is average of squared deviations It is root mean squared deviation.…
Q: What is the relationship between the standard deviation and variance?
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