The geometric mean of 10 observations on a certain variable was calculated as 16-2 was later discovered that one of the observations was wrongly recorded as 12-9, in fact it was 21-9. Apply appropriate correction and calculate the correct geometric mean..

Q: Suppose that the mean score of a class of 29 students was 78. The 16 male students in the class had…

A: From the provided information, The mean score of 29 students was 78. The 16 male students has mean…

Q: The mean marks scored by 6 students in a database exam is 54.4. If a student who got 66 is also…

A: Given: old mean=54.4old n=6 An additional item 66 is added. The new mean is calculated as below: new…

Q: If the correlation coefficient between number of years of experience of an employee and the monthly…

A: The correlation coefficient between number of years of experience of an employee and the monthly…

Q: (u) The mean marks of 100 students were found to be 40. Later on it was discovered that a score of…

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Q: The mean of Salary of 500 employees per day was found to be 150. But later on, it was found that the…

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Q: What do you mean by the differences estimator and how it is calculated?

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Q: The mean salary paid to 1000 employees of a factory was found to be Rs. 2804. Later on it was…

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Q: Mean of 100 items is found to be 30. If at the time of calculation two items are wrongly taken as 32…

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Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

A: 1) The researcher is testing whether mean is different from 136. Hence, the null hypothesis and…

Q: After 6 points have been added to every score in a sample, the mean is found to be M = 70 and the…

A: 15.a.Given:New mean M=70New Standard deviation s=3Constant added=6The addition of constant value to…

Q: 48. (a) The mean and S.D of a set of 100 observations were worked out as 40 nd 5 réspectively. But…

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Q: At the end of the semester the lecturer runs a regression using the student's final grade as the…

A: Let the regression equation be y=mx+b where, y is the dependent variable mx is the estimated…

Q: How to find the standard deviation

A: Mean:Mean is a measure of center in case of quantitative data. Mean of a data set is the sum of the…

Q: The highway department is testing two types of reflecting paint for concrete bridge end pillars. The…

A: Sample 1 (orange paint): n1=12x¯1=9.4s1=2.4 Sample 2 (yellow paint): n2=12x¯2=7.1s2=2.0

Q: I don't understand the 4th column and the letters A, d etc and what they represent. Too many steps…

A: The standard deviation can be evaluated via the following steps: 1. Tabulate all the class…

Q: The highway department is testing two types of reflecting paint for concrete bridge end pillars. The…

A: There are two independent samples which are orange paint and yellow paint. We have to test whether…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given Information: Mean μ=69.0 inches Standard deviation σ=2.8 inches. To find the z-score of a man…

Q: Explain the empirical relationship between mean ,median and mode for the data from field of physics.…

A: For a moderately skewed distribution there exists a relation between the mean, median and mode which…

Q: he highway department is testing two types of reflecting paint for concrete bridge end pillars. The…

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Q: The mean of 100 observation was 50, later if was found that one observation 35 was wrongly copied as…

A: Solution is given:

Q: How does the curve change when the standard deviation is the same and the mean changes?

A: The mean is the center of symmetry of a curve or normal density curve.

Q: Suppose a student did a research project to examine whether the genre of music produces different…

A: Given: n1 = 15 n2 = 23 X1 = 55 X2 = 51 S = 0.06 Formula Used: Test-statistic t = X1-X2S1n1+1n2

Q: Block 101 got a mean of 87.5 with a standard deviation of 3.2 while Block 102 got a mean of 85.1…

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Q: Suppose the timing device used in the men’s race failed to activate at the start of the race and…

A: The data for the time recorded for 17 men is given.

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

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Q: The revenue (in millions of dollars) for a company from 2007 to 2016 is given in the following…

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Q: What would happen to the margin of error if the standard deviation were to decrease? it would…

A: We know that ,Margin of error=critical value ×standard deviation sample sizeMargin of error =Zα2 ×σn…

Q: If the mean of your grades in 4 subjects in the first semester = 60 , and the mean of your grades in…

A: Given that, the mean of grades in 4 subject Mean1, X1= 60  And mean2, X2= 50

Q: The highway department is testing two types of reflecting paint for concrete bridge end pillars. The…

A: Given: Significance level α = 1% = 0.01 For Orange Paint: n1 = 12 X1 = 9.4 s1 = 2.4 For Yellow…

Q: I don't understand how to use the given information to answer the questions about the mean and…

A: Given probability distribution…

Q: At the end of the semester the lecturer runs a regression using the student's final grade as the…

A: Given: Male dummy (equals one if the student is male and equals zero otherwise).

Q: A researcher studying stress is interested in the blood pressure measurements of chief executive…

A: Given information Hypothesized mean µ = 132 mm hg Mean x̅ = 138 mm hg Standard deviation (s) = 18 mm…

Q: The mean and standard deviation of 20 items was found to be 10 and 2 respectively. Later it was…

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Q: Prove that the sum of deviations from mean is zero.

A: Statement: The sum of deviations from mean is zero.

Q: T'he mean and standard deviation of a set of 100 observations were worked out as 40 and 5…

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