What is the need of coefficient of dispersion in data analysis? If 25% of the items are less than 10 and 25% are more than 40, then obtain the coefficient of quartile deviation.

Q: What is the purpose of the confidence intervals in Statistics?

A: Confidence interval is derived from the Sample stastics for the estimatation of population…

Q: How would you explain the analysis of variance, assuming that your audience has not had a statistics…

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Q: Where are most of the data gathered in a negatively skewed distribution? Which value is larger, the…

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Q: Using the same data from the previous question, what are the range, sum of squares, sample variance,…

A: Range is the difference between Maximum and Minimum value.

Q: Look for the following: Mean, Median, Mode, Variance, Standard Deviation, and z-score. Class…

A: We have given a grouped data table consisting class intervel and frequency, We have to find out,…

Q: In a certain population, the mean price of the stock prices was 230, the median was 262, the…

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Q: Under what conditions would it be better to use the median instead of the mean?

A: n statistics, three measures of central tendency are widely used. These three measures are also…

Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

Q: What is the mean of Class A and B? What are the standard deviation and variance of Class A and B?…

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Q: What does Chebyshev’s rule say about the percentage of observations in any data set that lie within…

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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: 2) Explain why the standard deviation would likely not be a reliable measure of variability for a…

A: In order to analyze the standard deviation that will not be reliable based on the measure of…

Q: Which measure would you use to explore the dispersion of your data? Choose all. variance mean mode…

A: We have given that,  Which measure would you use to explore the dispersion of your data?

Q: Suppose you add 2 days to each datum in the duration of hospital stay. a. What is the effect on the…

A: Adding any term in every observation of the data change the median.  If we add 2 then 2 will be…

Q: For a distribution Bowley's coefficient of skewness is - 0.56, Q = 16.4 and median = 24.2. What is…

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Q: Explain the formula for the variance of the sampling distribution of the mean?

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

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 are the values for the SS, variance and standard deviation for the following sampleo of n =3…

A: Given information- Sample size, n = 3 We have given 3 scores Mean of the score x-bar = 4 So from…

Q: What does Chebyshev’s rule say about the percentage of observations in any data set that lie within…

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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 statistical tool should be used for the problem?  An insurance company wants to determine the…

A: We need to identify suitable statistical tool

Q: What are the range, variance, and standard deviation of 0, 5, 10, 15, 20, and 25?

A: The following information has been given: 0, 5, 10, 15, 20, 25

Q: Find the standard deviation. Round to one more place than the data. 6, 20, 18, 9, 15, 20, 18, 20, 8

A: We first find the mean by adding all the values and then dividing by the total number of elements.…

Q: What is the relationship between a frequency or relativefrequency distribution of a quantitative…

A: Justification:Qualitative and quantitative data:Qualitative data are non-numerical measures such as…

Q: If a data set has values and a standard deviation 7.4, what is the variance?

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Q: If a data set has 25 values and a standard deviation of 7.4, then the variance is?

A: Given: Standard deviation = 7.4

Q: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

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Q: What is the equation for The standard deviation of the distribution of sample proportions

A: Let p be the population proportion of successes.

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

Q: Describe when you would use an analysis of variance versus an independent samples t-test.

A: Analysis of variance (ANOVA) is used when we have more than two independent samples whereas…

Q: Why is it important to report both a measure of central tendency and variability to describe a set…

A: Basic idea about measures of central tendency and dispersion Measure of Central tendency is the…

Q: Look for the following: Mean, Median, Mode, Variance Standard Deviation, and z-score. Class…

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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 relationship between the mean of a population and the mean of its sampling distribution?

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Q: Two accounting professors decided to compare the variance of their grading procedures. To accomplish…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: What is the symbol for the sample linear coefficient correlation?

A: Linear correlation coefficient is denoted by r.

Q: Q5 Calculate Quartile Deviation and its Coefficient from the following data

A: Here given frequency distribution of weight  Here use quartile deviation and it's coefficient…

Q: (b) Predict what will happen to the data distribution if outlier exists in the data.

A: An outlier is defined as that value in the data set, that lies at an extreme distance as compared to…

Q: Calculate Variance, Standard deviation, and Coefficient of Variation (CV) of the students heights.

A: Let X be the height of the student. A 179 174 156 171 170 165 170 157 155…

Q: hospital stay

A: Mean: It represents the average of the given collection of data. Median: Generally median represents…

Q: What is the formula for the mean absolute deviation formula for paired data sets?

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Q: 2. Explain the relationship between the population mean µ, the sample mean X, and a value of the…

A: Population: Population consists of the complete subjects that are included in the study for making…

Q: Example The costs per load (in cent) of 20 laundry detergents tested by a consumer organization are…

A: The following table gives the data with the required calculations:

Q: Can the measure of central tendency tell  a researcher how spread out the scores are in a…

A: Introduction:A measure of central tendency helps to identify the location of a dataset, whereas a…

Q: Two accounting professors decided to compare the variance of their grading procedures. To accomplish…

A: The variance of grading procedure for Professor 1 is σ12 and the variance of grading procedure for…

Q: If the mean time to respond to a stimulus is much higher than the median time to respond, what can…

A: There can be three different shape of the distribution: 1) Positively skewed: Most of the values…