17. From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900. The standard error of the mean is approximately. 30 1.4847 2 1.1022

Q: What does a z-score of –1.5 mean? A.The mean is 1.5 standard deviations less than the measurement.…

A: 3. z-score: The z score determines how far the individual measurement is from the value of mean. If…

Q: Compute for the variance of all the data on Table 2. Show your solution and  answer inside the box.…

A: Given are three sets of data, namely for student A, B and C: Enter data in Excel and calculate mean…

Q: A set of 5 scores has SS = 20. If the scores are from a sample, the sample variance is the…

A: The population variance is σ2 = SS/N, where SS is the sum of squared deviation scores and N is the…

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…

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Q: ir there is claim that the variance of sales is defferent from 39. A sample of 29 is chosen, the…

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Q: We would like to compare samples from two different populations A and B. The means of these two…

A: Given that, MuA= 200 MuB= 200 Var(A) = 72 Var(B) = 200 Sample size, nA = 36  nb= 100 We've to find…

Q: Suppose that average male weight in the US is 175 pounds with a standard deviation of 25 pounds.…

A: It is given that population mean µ=175 pounds, population standard deviation σ=25 pounds. Sample…

Q: To compare the mean lengths of time to recovery after two surgical procedures I and II, 10 patients…

A: To check whether there is any difference in the mean recovery time after surgical procedure I and…

Q: A sample of size N is taken from a population of an unknown size. The average squared deviation from…

A: The average square deviation for the mean from this sample is also known as variance of the given…

Q: Q9. Here is a calculation in a spreadsheet of the 5 numbers in a population of x = {1,2,3,4,5}.…

A:

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

A: L

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

A:

Q: Suppose that the random variable X measures the number of hot dogs purchased in a food court in an…

A: CorX,Y=0.75VX=VY=36W=2X+3Y

Q: daily consumption of coffee between males and females? A random sample of 40 males consumed an…

A: Given that  Sample sizes n1=40 , n2=50 Population variance ?12=1.2 ,  ?22=2

Q: An analysis of variances produces dfnetween= 3 and dfwithin = 24. If each treatment has the same…

A: Given that,dfbetween = 3dfwithin = 24Each treatment has the same number of participants.

Q: An analysis of variance produces SSb = 30, SSw = 60, F-ratio with df = 2, 15.      For this…

A: From the provided information, SSb = 30 and SSw = 60 Degree of freedom (k - 1) = 2 And (n - k) = 15

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

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: Suppose the variance of X is 95. What is the variance of .09X?

A: The objective of this question is to find the variance of a variable that has been scaled by a…

Q: In a 25-Question multiple-choice, there are five possible answers of which one is correct. Let X:…

A: X=number of correct answers  n=number of trials=25 p=probability of success= 1/5 =0.2 [because each…

Q: 3. A sample of n = 25 scores has a mean of M = 200 and a variance of s² = 100. a. Explain what is…

A: Sample is the any fraction of the population. The sampling distribution corresponds to the value of…

Q: A researcher calculates the variance of her sample to be s = -6. , what would you tell the…

A: Here's the explanation for this as follows; The sample variance, s², is used to calculate how varied…

Q: A research conducts an analysis of variance. The data produces SStotal = 80 and SSwithin = 30. For…

A: Given SStotal=80SSwithin=30

Q: 5. A normal population has mean 200 and variance 49. How large must the random sample be if we want…

A:

Q: 11 The mean of prices of computers is OMR 176 and the coefficient of variation (CV.) is (7.5%). Find…

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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: 12) If the standard deviation of a data set is (17.2); the variance will be (295.84).   Select…

A:

Q: Suppose the variance of X is 33. What is the variance of .23X?

A: Given,Var(X)=33 we know that Var(ax)=a2Var(X)

Q: Enter the decision rule. Reject Ho if z > _______

A: The claim of the test is, that the medicine relieves pain in more than 340 seconds indicating the…

Q: A researcher is trying to determine if racial background affects income. In a sample of 100 people,…

A: From the above data What proportion of the variance in income can be explained by racial background…

Q: 1. Consider a random sample of size 100 from a normal population with a mean of 2 and variance of…

A: Given data  normal distribution n = 100 μ = 2σ2 = 25standard error of sample mean =?

Q: An analysis of variance comparing three treatment conditions produced dftotal = 17. If the samples…

A: ANOVA(Analysis of variance) is a main branch of statistics, which is used to compare the means of…

Q: After giving a statistics exam, Professor Dang determined the following five-number summary for her…

A: The given five- number summary for her class results are: 60     68    77    89    98    The five…

Q: s Consider A random sample of 150 in size is taken from a population with a mean of 1640 and…

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Q: 12. A population has a u = 30 and o = 12. A random sample of n =36 is selected. Calculate the…

A:

Q: An analysis of variance produces SSbetween = 40, SSwithin = 60, and an F-ratio with df = 2, 15. For…

A: It is given that: SSBetween=40SSWithin=60df1=dfBetween=2df2=dfWithin=15

Q: From the community hospital and clinics around a city, the ages of dentists, nurses and physicians…

A:

Q: proportion of individuals with a certain disease is 0.10. if we select a sample of size 1000 from…

A: For provided information, proportion of individual with a certain disease is 0.10. Sample size of…

Q: What is the difference between Micro and M? a. Micro (u) is the variance and M is the mean  b.…

A: We know that  symbol (u) represents the population mean

Q: A yogurt producer claims the variance on their yogurt containers is 4 grams or less .A sample of 30…

A: We have to find correct option..

Q: Here is a calculation in a spreadsheet of the 5 numbers in a population of x = {1,2,3,4,5}. %3D

A: Given: population of x = 1,2,3,4,5