The following are sum of the particulars distribution of weights, of boys and girls in a class. Boys Girls 100 50 60 45 9 4 Find the S.D. of the combined data? Which of the two distributions is more variable. No. of persons Mean weights (Kgs) Variance of

Q: Parameters (Median Mean Variance Standard Deviation Skewness (using Moment Coefficient). Kurtosis…

A: We have given a data set 150303, 159084, 150301, 151342, 150300 The number of observations n=5

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A: It is given that the mean and standard deviation are 4.4 and 8.24.

Q: If sum of squares of deviation from the mean =20  and sample variance is 5  then the  number of…

A: Given, sum of squares=20 variance=5 number of observations=?

Q: 4.80. Let X, and X, be two independent random variables. Let X, and Y= X,+ X, have Poisson…

A: Given that, X1~ P(mu1) And Y~P(mu)  For X1, probability density function, f(x1)= e-mu1 (mu1)x1/(X1)!…

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A:

Q: What is the explained variance and unexplained variance. correlation coefficient, is .771…

A: Determine the value of explained variance.   The value of explained variance is determined below as…

Q: distribution shown in the preceding histogram is    .   Based on the shape of the distribution,…

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Q: The director of research and development testing and new drugs she wants to know if there's evidence…

A: Test statistic:Denote μ as the claimed mean; μ = 384. In a random sample of n = 79, the sample mean…

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

A: L

Q: Given the following data for a group of 17 pupils. A. Heights in inches 60, 63, 61, 58, 57, 61, 59,…

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Q: Data for two variables (for height in cm and weight in kg) are taken from 100 female and 100 male…

A: The variability is directly proportional to standard deviation. So, lower the standard deviation,…

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 14, 16, 18,…

A: Given observation SAMPLE of scores is: 14, 16, 18, 13, 13, 19, 21, 11 n = 8

Q: Why do we take the square root of the variance to obtain the standard deviation? to make the…

A: We know that, Standard deviation: It is the positive square root of the arithmetic mean(A.M.)  of…

Q: The deviation of an entry x in a population data set is the difference between the entry and the…

A: Note: Hi there! Thank you for posting the question. It is considered that the deviation is taken…

Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: I am trying to determine the variance, standard deviation and the CV for a set of data. The data…

A: Descriptive statistics are referred to as the summary statistics.

Q: The first four moments of a distribution about the value 5 of the variables are 2, 20, 40 and 50.…

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Q: Table 1 Profits Number of days (Dollars) 10-24 2 25-39 6 40-54 8 55-69 11 70-84 3

A: If the frequencies are distributed among groups then that is called as grouped frequency. Frequency…

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 15, 17, 19,…

A: Given data is 15, 17, 19, 22, 10, 23, 16, 15S.S=122.88

Q: average marks obta follows Section Average marks No. of students Find combined mean. by the students…

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Q: A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard…

A: Given statistics:Consider the variable x represents the distance scores in yards.The given…

Q: An analysis of variance produces SSb=35,SSw=15 and a F ratio with the df=1,5.What is the F ratio?

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Q: The heart rate of humans are normally distributed with a mean of 90.3 bpm and std. dev. of 7.3 bpm.…

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Q: bound ratio of variances of cable to network is 0.5531, your conclusi about the spread of the…

A: s1 = 0.16 s2= 0.13   n1 = 15 n2 = 12

Q: The following table gives the frequency distribution of the amounts of telephone bills for August…

A: Given, The dataset which contain amount of telephone bill and number of families . Lower Limit…

Q: Assume the samples are random and independent, the populations are nomally distributed, and the…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

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Q: What percentage the male population is between 72 and 76 inches in height?

A: The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches…

Q: IQ scores are normally distributed with a mean of 100 and a variance of 225. What percentage of…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and variance (σ2) = 225…

Q: If the deviations six of values from their mean are 0 , -6, 7 , -2 , 5 , -4 then the variance equal…

A: Variance: Variance is used to explain how the data points (or values) are deviated from the mean and…

Q: Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of…

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Q: If the mean of grades in statistics = 65 and the variance : 400 , then the Z score of grade 50 =

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Q: d and f only   do not understand how to calculate     Where are the deer? Random samples of…

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Q: calculate the following X= (455.2, 676.7, 784.7, 349.1, 437.5, 678.3, 760.2, 788.4, 278.3 and 455.2}…

A: As per the question we are given the following data set : X = {455.2, 676.7, 784.7, 349.1, 437.5,…