Seventy-four percent of Americans favor spending government money to develop alternative sources of fuel for automobiles. For a random sample of 120 Americans, find the mean, variance, and standard deviation for the number who favor government spending for alternative fuels.

Q: what is the sample standard deviation?

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Q: Calculate the variance and standard deviation for the following data  [8; 3; 5; 5; 7; 2]

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Q: 5. Thirty-two percent of adult Internet users have purchased products or services online. For a…

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Q: Find the Mean, Variance, and Standard Deviation (round off to two decimal places)

A: Given: No. of students, n=50 Scores of students 78 95 91 78 91 83 80 99 93 91…

Q: What is the variance and standard deviation of 2, 4, 5, and 6?

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Q: With the aid of a table, find the sample Standard Deviation of the following dataset: X = {2.2, 4.7,…

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Q: compute for the mean, variance and standard deviation.

A: Here given, Three paper bills are drawn in succession without replacement from a piggy bank. Piggy…

Q: Twenty-nine percent of adult Internet users have purchased products or services online. For a random…

A: It is given that 29% of the users purchase online. Therefore, probability of a randomly selected…

Q: Calculate the mean, standard deviation, and variance for the following five scores: 9, 4, 7, 1, 4.

A: Considering the scores as population. The population mean is, μ=∑XN=9+4+7+1+45=255=5 Thus, the…

Q: Calculate the mean, standard deviation, and variance for the following five scores: 9,4,7,1,4.

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Q: a. The mean, median and mode b. The standard deviation and variance.

A: Given: number of observation, n=10 values for fuel economy  40 33 32 30 27 29 27 23 21 10

Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

Q: If the mean of a random variable is 30 and the standard deviation is 6, and three consecutive data…

A: It is given that, Mean,μ=30 Standard deviation,σ=6

Q: Find the variance and standard deviation of the data

A: Given data, x=5,6,8,9,10,11,14   The sample mean is

Q: 1. Determine the Range, Standard Deviation, and Variance of the height in inches of the 30…

A: Here use formula of standard deviation, variance and range

Q: Explain the formula for the variance of the sampling distribution of the mean?

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: Two samples, each with n =5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given: Let the pooled variance be sp2 n1=n2=5   Let the standard error be SE Formula for Standard…

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

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Q: Illustrate the mean or expected value, variance and standard deviation

A: given: x f xf (x- x )2 f*(x- x )2 4 1 4 25 25 5 2 10 16 32 8 2 16 1 2 10 2 20 1 2 13 2…

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

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Q: A history class has 75 members. If there is a 12% absentee rate per class meeting, find the mean,…

A: It is given that n is 75 and p is 0.12.

Q: What is the mean, variance and Standard Deviation?

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Q: . Defective DVDS From past experience, a company found that in cartons of DVDS, 90% contain no…

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Q: The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range,…

A: We have to calculate some summary statistics for given data.

Q: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

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Q: compute the range, variance, and standard deviation for the two samples

A: The Data is given as: Atlanta(x) Salt Lake City(y) 340.1 570.1 321.6 354.6 291.6 465.6…

Q: A bookstore found out that 23 percent of their customers buy a book, 34 percent of their customers…

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Q: The purchase value of transactions at a grocery store is normally distributed with a mean of $244…

A: Consider X be a random variable which follows normal distribution indicates the purchase value of…

Q: Find the sample variance and standard deviation. 19, 13, 2, 9, 11 O

A: 19 361 13 169 2 4 9 81 11 121

Q: following data, calculate the variance of X (sample variance).

A: The sample mean is, X¯=∑Xn=426=7 The sample means is 7.

Q: Two accounting professors decided to compare the variance of their grading procedures. To accomplish…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: (a) Among the next 210 customers, what are the mean and variance of the number who pay with a debit…

A: Consider the events A, B and C that represents the customers who pay with a credit card, debit card,…

Q: Find the range, the standard deviation, and the variance

A: Given: The sample space 50, 63, 56, 69, 96, 65, 83, 60, 98. To find: The range, the standard…

Q: The manager of a fast-food restaurant selected several cash register receipts at random. The amounts…

A: Given data values are 12, 15, 16, 10 and 27. a. Range: Range=Maximum value-Minimum value…

Q: Two baseball players, Fredo and Karl, on different teams wanted to find out who had the higher…

A: Given  For ferdo: Batting average=0.158 Team batting average =0.166 Team standard deviation=0.012…

Q: In data analysis, which of the two will you consider the most: Mean or variance? Discuss.

A: Mean is a central tendency,  sum of a collection of numerical data divided by the count of data in…

Q: Thirty-two percent of adult internet users have purchased products or services online. For a random…

A: Obtain the mean for the number who has purchased goods or services online.   The mean for the number…

Q: What is the sample standard deviation?

A: To Discuss: What is the sample standard deviation?

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

A: Solution

Q: Find the range, the standard deviation, and the variance for the given samples. Round non-integer…

A: To find: The range, the standard deviation and the variance to nearest tenth. Given: The samples…

Q: Allan, a Grade 12 senior high school student, wants to estimate the average number of students who…

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Q: If the mean of a random variable is 30 and the standard deviation is 6 , and three consecutive data…

A: It is given that, Mean,μ=30 Standard deviation,σ=6

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

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Q: A recent survey of students at Regina Mundi College included a question about the number of school…

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Q: Find the sample standard deviation for the following scores: x = 2,45,2,6,3,2,9,10,11,34,64

A: The random variable is x. The sample size is 11. It is given that, the sample size of 11…

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given Datan1 = n2 = 5pooled variance = 40Estimated standard error is given by

Q: The average speed of 64 random cars traveling on a certain highway was 80 km/h and the sample…

A: We have given that,  Average speed (x̄) = 80 , standard deviation    (s) = 20, Confidence level(C.I)…

Q: Find the Mean, Median and Standard Deviation for the data. Round to two decimal places.…

A: The following data has been given: 10,7,9,3,8,15,5,5,12

Q: Compute for the mean, the variance and standard deviation of this frequency distribution. Score…

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Power Operation

Power operation is topic of algebra in Math. It is use to represent repeated multiplication. Very big number and very small number can be easily express using power operation. Power operation is useful in many fields. In space engineering, it helps in representing the distance or size of particular heavenly body. In medical field, it is used to represent very small size. In medical field it helps to mention size of bacteria or virus. 

Exponents

The exponent or power or index of a variable/number is the number of times that variable/number is multiplied by itself.