46. Which of the following measures is referred to as the square root of the mean of the squared deviations from the average? (A) mean (C) variance (B) median (D) standard deviation

Q: According to the Empirical Rule, what percentage of the observations in a data set that can be…

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Q: All of the below sets have the same mean.       Set 1-Standard Deviation=3.1       Set 2-Standard…

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Q: What percent of the population lies between +1.96 standard deviations above the mean and +2.58…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: What percent of data points fall in the range of z=-1.5 and z=1.5 standard deviations of the mean

A: From the provided information, The range is between z = -1.5 to z = 1.5

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: Imagine that you and four of your classmates have measured the density of air and recorded the…

A: Let X be an density of air kg/m3. Therefore, X=1.27,1.21,1.28,1.25,1.24 We have to find average,…

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: 16. Descibé thé shapé of the data distribution and the location of the mean in relation to the…

A: For the box plot Find the shape and location of mean relation to median

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

A:

Q: 2. Write a paragraph that explains why "the z-score associated with the raw score of r; (i.e., ) is…

A: From the standard normal curve, The z-score of any raw data set provides the information about the…

Q: According to Chebyshev's rule, within 10 standard deviations from the mean, lies at least of any…

A: Given Information: According to Chebyshev's rule, within 10 standard deviations from the mean, lies…

Q: For the set of scores 5,10,10,15,25 calulate the mean, median,mode,range variance, and standard…

A: We have given that data  5,10,10,15,25 Mean = sum of all observations/total number of observations…

Q: According to Chebyshev's rule, within 10 standard deviations from the mean, lies at least_ data of…

A: According to Chebyshev's rule, within 10 standard deviations from mean, lies at least 99% of the…

Q: Calculate mean deviation from mean and median for the following data : Comba 500 100 150 200 250 360…

A: Given : Sample 100 150 200 250 360 490 500 600 671

Q: If 40 is added to cach of a set ofr 25 values, the Coefficient of Variation changes to 40 % and if…

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Q: What is the Z value for a value of X = 60?

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Q: 6. Which of the following statistics may be obtained even if not all the values in the data are…

A: Given problem Given that   Which of the following statistics may be obtained even if not all the…

Q: What is the coefficient of variation of a data, which has a standart deviation 28 and mean as 400?…

A:

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

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Q: In Pittsburgh, Pennsylvania, about 56% of the days in a year are cloudy. Find the mean, variance,…

A: Given, In a year 56% of days are cloudy. Now during June month 30 days. Each day is independent of…

Q: If Quiz A has a mean of 7.6 and a standard deviation of 2.0 and Quiz B has a mean of 7.9 and a…

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Q: Which of the following can be thought of as the “average deviation”? a. Sum of Squares b. Variance…

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Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: What is the average score for those who say they are an employee who others can depend on with the…

A: Average score: The general formula to obtain the expected value (mean) of a discrete random variable…

Q: Which of the measures are appropriate to summarize quantitative variables with skewed distribution?…

A: Given that  Which of the measures are appropriate to summarize  quantitative variables with skewed…

Q: Solve the following problems: ( Ungrouped Data) The systolic blood pressures of 12 smokers are as…

A: Data given  114, 116, 118, 120, 122, 124, 126, 128, 130, 130, 134, 146

Q: 4- Which one of these statistics measure is unaffected by outliers? а. Мean b. Median С. Standard…

A: Answer: Outliers are the extreme values in the data set. It can be extremely high or low values. A…

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

A: a.We have to determine the percentage of observations in any data set that lie within six standard…

Q: About 68% of the data lie within. standard deviation of the mean One Two Three Four

A: Let X be a random variable follows normal distribution with mean µ and standard deviation σ. X~N (µ,…

Q: What is the sample variance and the sample standard deviation for this distribution? b.  If we had…

A: Given : n=60 , SS=240 Our aim is to find the sample variance and sample standard deviation.

Q: We are going to calculate the standard deviation for the following set of sample data. 8 15 11 6. 3…

A: Given data, 8,5,11,9,3 standard deviation=?

Q: for the set of scores 10 15 20 20 15 calculate the range variances and standard deviation by hand

A: Given that ; scores(x) ; 10 15 20 20 15 By using formula  Range = highest value - lowest value…

Q: 2. Write a paragraph that explains why “the z-score is the number of standard deviations x; is above…

A: To explain:   The z-score associated with the raw score of x is the number of standard…

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: Q2/ The number of hours worked by 10 employees of small building firm during a week were: 45 46 34…

A: Given data, 45,46,34,47,44,42,46,42,43,44

Q: 23. The mean of the sample means equals population mean divided by the standard deviation divided by…

A: Sample mean is always equal to the population mean

Q: 4. Show that mean deviation about mean is

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Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A: Solution

Q: 2.5% Of scores on a normally distributed college entrance test or below 60% and 2.5% of the scores…

A:

Q: 4. What is the range of data values that would allow 99% of the fall within the mean? 5. Why does…

A: “Since you have mentioned the question number 4 and 5, we will solve that question for you. If you…

Q: 7. A set of data has a variance of 81. What is the standard deviation?

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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: 2. What is the difference between the standard deviation and the coefficient of variation? When is…

A: Standard deviation: Stan. deviation shows how far the observations are form the mean of the data.…

Q: 4. The variance of a data set is 3410.56. Find the standard deviation for the data set.

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Q: Q1] For the following table that represent the statistical data for ages and its frequencies. Find…

A: Given data, Age Frequency 5-9 10R 10-14 16R 15-19 20R 20-24 35R 25-29 46R 30-34 55R…

Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…

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Q: 3. The annual per capita consumption of ice cream (in pounds) in the Philippines can be approximated…

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Q: About what percent of x values lie between the first and second standard deviations from the mean…

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Q: Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How…

A: Given that  mean = 73.7 and standard deviation =  2.5

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.