From a normally distributed population, we took a simple random sample of 700 students with a mean score of 640 on the biology section of the test. Suppose the standard deviation of the population is 300. Estimate the population mean with: a. 90% confidence b. 95% confidence c. 99% confidence

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Q: n this scenario, what is the test statistic? A linguist believes the average age children learn a…

A: Given: n= 21.0 ,x̄= 9.2 ,s= 2.5 µ= 10.0 ,degree of freedom= 20.0

Q: A population has mean µ = 40 and %3D standard deviation o = 20. What should %3D the sample sizen be…

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Q: A sample is collected from the items produced by a company. The sample size is 49. The standard…

A: Answer: From the given data, Population standard deviation (σ) = 0.32 Sample size (n) = 49

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A: Solution: Let X be the average age of class has normal  distribution  with mean μ=22.3 years and…

Q: For a sample of 300 students, you find that the mean GPA is 3.35 with a standard deviation of .21.…

A: Solution: From the given information, Standard deviation is 0.21 and n=300.

Q: The results of an analysis for a certain sample is given: 20.1, 24.1, 23.5, 22.2, and 21.6. Find the…

A:

Q: Find  Variance and Standard deviation for the following data.  4,  4,  7,  11,  14.

A: Given sample xi is:  4, 4, 7, 11, 14  Sample size, n = 5   Sample mean can be calculated as:…

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A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: A population has a mean µ = 84 and a standard deviation o = 29. Find the mean and standard deviation…

A: Suppose the variable of interest is x. It is given that; x has mean µx = 84 and the standard…

Q: You have a normal distribution of test scores with a mean of 100 and an SD of 15. Use the empirical…

A: given data normal distributionμ = 100σ = 15use empirical rule to answer . What range of scores…

Q: The population has a mean of 14 and a standard deviation of 3. The sample size of your sampling…

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Q: A population has a mean of u = 30. If 3 points are added to each score, what is the mean for the new…

A: Given :  Mean(μ)=30 and N=3

Q: For a sample with M = 90, a score of X = 88 corresponds to z = -1.00. What is the sample standard…

A: Solution-: Given: M=90, X=88, z=-1 We want to find the sample standard deviation?​

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

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Q: In a population, the mean is known to be 1.27 and the standard deviation is known to be 0.351.…

A: The population mean is 1.27; μ=1.27 The population standard deviation is 0.351;σ=0.351 The sample…

Q: A population has a mean μ = 79 and a standard deviation o=23. Find the mean and standard deviation…

A: Mean(μ)=79standard deviation(σ)=23sample size(n)=245

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A: The 95% confidence interval: 1.2 mi/day to 7.8 mi/day If this is incorrect try to input 1.3 mi/day…

Q: For a random sample of 40 students, the average statistics midterm score is 73 points (out of a…

A: The sample size is 40, average statistics midterm score is 73 points, and standard deviation is 7.3.

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: A population has a mean u=71 and a standard deviation a=20. Find the mean and standard deviation of…

A:

Q: Your instructor wishes to estimate the mean amount of time students spend studying math each…

A: Given that  Margin of error =E =2 Population standard deviation =12.7 95% confidence.

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

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Q: A simple random sample of 144 observations was taken from a large population. The sample mean and…

A: sample mean is given by, x = 120.8 and sample standard deviation is given by, s = 32.46 Number of…

Q: A test has a mean score of 55 with a standard deviation of 12. Using the Empirical Rule determine…

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Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: According to the given information in this question We need to find standard error

Q: For a random sample of 55 overweight men, the mean of the number of pounds that they were overweight…

A: Given data, n=55 μ=32σ=4.1Point estimate μx=?

Q: For a sample with a mean if M=63, a score of X=54 corresponds to Z= -0.75. what is the sample…

A: Given,Mean(M)=63a raw score(X)=54Z-score=-0.75

Q: We have a distribution with a mean of ? = 78.0 and ? = 12.5. Find the raw score equivalents for the…

A: We have given that.   X~N( μ , ?^2 )   μ =78 , ? =12.5   Z-score =( x - μ )/?   NOTE:- According to…

Q: Given a scenario where n=100 and p=0.8, find the standard deviation.

A: In this case the sample size is n = 100 and p = 0.8.

Q: A population has a mean u= 85 and a standard deviation o = 16. Find the mean and standard deviation…

A: List of formulae : Mean of sampling distribution of sample mean ( x¯ ) : μx¯  = μ Standard deviation…

Q: We have a distribution with a mean of ? = 35 and ? = 3.5. Find the raw score equivalents for the…

A:

Q: A population has a mean u = 87 and a standard deviation o= 21. Find the mean and standard deviation…

A: Givenmean(μ)=87standard deviation(σ)=21sample size(n)=249

Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: Givensample size(n)=100Mean(x)=81standard deviation(s)=9

Q: A population has a mean μ=88 and a standard deviation σ=28. Find the mean and standard deviation of…

A: Given,   Mean = 88 Standard deviation = 28   The mean and standard deviation of a sampling…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.