What is the standard deviation (spread from mean) of the dot plot?

Q: The spread or dispersion of a set of data about the mean will be large if the standard deviation is…

A: Solution

Q: Why is normal distribution important in statistics and in everyday life?

A: Normal Distribution is important in statistics because many natural phenomena follows Normal…

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: what percent of the data falls within 2 standard deviations of the mean?

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Q: To measure variability, why is the standard deviation usually preferred over the range? Give an…

A: (a) The standard deviation is used to calculate the variability of the data set. It tells us about…

Q: What is Estimated Standard Error of the Mean?

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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: Let us suppose that the amount of bread consumed by adult Americans per day can be modeled by a…

A: Given: Mean(μ)  = 32 oz Standard deviation (σ) = 13.3 oz

Q: how do you calculate the mean and standard deviation without a calculator ?

A: In this question we have to tell that how to find the Mean and Standard deviation without using the…

Q: Calculate the standard deviation

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Q: Explain the percentage slabs under the Standard Deviation Rule?

A: The percentage of slabs under the standard deviation rule or empirical rule is discussed as follows:

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: What is meant by saying that a variable has a chi-square distribution?

A: Chi-square distribution: If the distribution of the variable has a special type of right skewed…

Q: Determine the number of standard deviations from the mean (z-score). In the United States, the…

A: Given mean female height = 64 inches and standard devaiton = 3 inches.The distance of a data point…

Q: Why does Mean of the Deviations Not a Useful Measure?

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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: Compute the Average Deviation.

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Q: The heights of women in a particular community are normally distributed with a mean of 65 inches and…

A: We have to find given proportion..

Q: What does a relatively small standard deviation indicate?

A: Here we have to explain What does a relatively small standard deviation indicate?

Q: Why is the standard deviation important? Give specific examples to illustrate your understanding.

A: Standard deviation is the measure of the amount of dispersion of a set of values A lower standard…

Q: Find the mean deviation about mean of rectangular distribution,

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Q: It is possible to have a standard deviation of -1 for some data set? True or False

A: See the below solution

Q: The systolic blood pressure of 18 year old woman is  a roughly bell shaped distribution with mean of…

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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: When Christian runs the 400 meter dash, his finishing times are normally distributed with a mean of…

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Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: From the given information, Mean height (µ) = 62 inches Standard deviation (σ)= 4 inches Thus, the…

Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: If a random variable x has a distribution with mean µ and standard deviation σ, then the z-score is…

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

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Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 30.…

A: ∗Mean μ=190    standard  deviation σ=30    X~N 190,30 we need to find,   PX<130+PX>250=P…

Q: Calculate the correct mean and standard deviation.

A: Here use standard deviation and mean formula

Q: Explain Mean of the Squared Deviations?

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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: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 20.…

A: Given information Mean µ = 190 Standard deviation σ = 20

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Solution: Let X be the time a patient of a medical center spends waiting for an appointment. From…

Q: what is the standard error (usually standard error of the mean)?

A: Standard error: The standard error of the statistic is defined as the standard deviation of its…

Q: Square of the standard deviation is called

A:

Q: Define mean absolute deviation?

A: The mean absolute deviation is a measure of descriptive statistics. Here the words "mean" and…

Q: explain normal distribution with examples?

A: The normal distribution is the most important probability distribution in Statistics because it fits…

Q: Calculate The mean and standard deviation

A: Given Information :  On the midnight shift, the number of patients with head trauma in an emergency…

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: Explain Why can’t the value of the standard deviation ever be negative?

A: Standard deviation is basically the square root of the variance and variance quantifies the amount…

Q: What is the Standard Deviation and the Percentage that falls within the 1 Distance of Standard…

A: N=30 for the given data  First we will calculate mean  We have to calculate standard deviation and…

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

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Q: 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 data in a data set are normally distributed with a mean of 150 and a standard deviation of 30.…

A: In this problem, we are going to using The empirical rule(68-95-99.7 Rule)

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: the standard deviation or the interquartile range

A: answer of given question is in step 2

Q: How can get the standard deviation within the measures of dispersion or variability ?

A: From the given information, First it is required to understand the measure of dispersion or…