In the EAI sampling problem, the population mean is 71800 and the population standard deviation is 4000. For n=30 , there is a  .5064 probability of obtaining a sample mean within +-500 of the population mean. Use z-table. What is the probability -x that  is within 500 of the population mean if a sample of size 60  is used (to  decimals)? Sample sie of 120?

Q: A normally distributed population with 200 elements has a mean of 60 and a standard deviation of 10.…

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Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: A sample of n = 7 scores has M = 5. All of the scores are doubled. What is the new mean?

A: For a set of observations of size n, the mean is defined as M = Σx/n.

Q: Suppose that you have a sample of 100 values from a population with mean μ = 500 and with standard…

A: a. The sample size is 100, population mean is 500, population standard deviation is 80. The…

Q: What is the probability of a sample mean being between z-values of -1.58 and 0.79?

A: We have to find  the probability of a sample mean being between z-values of -1.58 and 0.79?

Q: The mean GPA of university students is 2.3 with a standard deviation of 1.2. If you were to draw 36…

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Q: The population mean for the average weigh of 12 year old children is 102 pounds and the population…

A: Solution: Let X be the weight of 12 year old children. From the given information, µ=102 pounds,…

Q: Find the probability that a sample of 18 has a sample mean below 32. The population mean is 24 and…

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

Q: We want to estimate the mean of a population. A random sample of subjects is selected and the sample…

A: From the provided information, Standard error (SE) = 1.8

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: Given data ,u=9.6σ=1.8n=36P9<x<10=?

Q: sample of 100 observations was taken from a large population. The sample mean and the variance was…

A: Solution: Given information: n= 100  Sample size x=80  Sample mean s2=144 Sample variance s=s2s=…

Q: The population mean and standard deviation are given below. Find the required probability and…

A: The mean is 226, the standard deviation is 5.5 and the sample size is 65.

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

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Q: Assume you have taken 125 samples of size 81 each from a population. The population variance is 64.…

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Q: Suppose heights of dogs, in inches, in a city have an unknown distribution with mean 24 and standard…

A: Given that heights of dogs in inches have a unknown distribution with mean 24 and standard deviation…

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

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Q: I need to find the indicated probability for a Mean of 24, an SD of 4.2. P(x > 30)

A: Given info: Here, mean is µ=24 and standard deviation is σ=4.2.

Q: find the probability of a sample mean being less than 12,750 orgreatrt than 12,753 when y= 12,750…

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Q: The mean television viewing time for Americans is 20 hours per week. Suppose a sample of 30…

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Q: If n=7 (days in a week) and p=0.45 (the probability that the food truck operates on a single day),…

A: Given information- Sample size, n = 7 The probability that the food truck operates on a single day…

Q: A population has a mean of 300 and a standard deviation of 40. Suppose a simple random sample of…

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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: Suppose that the population of middle-school children has a mean of 350 on a reading test and σ =…

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Q: A sample ofn 25 scores has a mean of M = 11. If each score in the sample multiplied by 6, then what…

A: Given information: n=25Old mean=11 Sum of 25 scores=Number of scores×Mean of scores =25*11=275

Q: Suppose a population distribution has a mean  = 150 and a standard deviation s = 30, and you draw a…

A: Given: Mean = μ = 150 Standard deviation = σ = 30 n = 100

Q: All California 5th graders take a standardized test. The mean for the population of 5th graders is…

A: If a random variable X has a distribution with mean µ and standard deviation σ, then the Z-score is…

Q: Thirty percent of people did not visit their doctor's, offices last year. Let x be the number of…

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Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…

A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…

Q: A population has mean 555 and standard deviation 40. Find the mean and standard deviation of sample…

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Q: Supposed you plan to take a simple random sampling of size n from a population that has a mean 80…

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Q: The probability that a person catches a cold during the cold and flu season Is 0.4. Assume that 10…

A: Given data, p=0.4 n=10 sd=?

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.