A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were determined to be 80 and 12 respectively. What isThe standard error of the mean?

Q: Use z-scores to compare the preformance of a student on two midterms: the first, with a mean of 78…

A: Given Information: The performance of a student on two midterms: First: Mean = 78, standard…

Q: Atticus, a CrossFit instructor at Mighty Box, selected random samples of 315 students from a nearby…

A:

Q: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random sample…

A: formula :

Q: For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score…

A:

Q: Two standard deviations away from the left and right of the mean is equal to 68.3%.

A: Basics: Empirical rule:

Q: The scores of ABM students in the final examination for general mathematics has a mean of 30 and a…

A:

Q: For an educational study, a volunteer must place in the middle 50% on a test. If the mean for the…

A:

Q: The mean of a set of data is 108.06 and its standard deviation is 115.45 What is the z score for a…

A: Z-score = 3.3045 answer.

Q: he sample mean for a recent introductory psychology test was 78, and the standard deviation was 3.…

A: Given Information: Mean = 78 Standard deviation = 3 Student received a score of 82 i.e., X = 82…

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

A: Standard error of mean=snwhere s=sample standard deviationn=sample size The standard error provides…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…

Q: A normally distributed set of population scores has a mean of 108 and a standard deviation of 15.5.…

A: We know that,  If X~Normal(mu,sigma) Then Xbar ~Normal(mu, sigma/√n) Where mu is mean.

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Q: A population has a standard deviation of σ = 18. On average, how much difference should exist…

A: Given data, σ = 18 n = 4   The standard error measures the distance expected on an average between…

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: A researcher collects 25 data points that yield a mean of 8.164 and a standard deviation (based on N…

A:

Q: A population has a mean of 50 and a standard deviation of 20. Would a score of X= 70 be considered…

A: If the score X is greater than Q3 + 1.5 (IQR) or lower than Q1 - 1.5 (IQR) then score X is said to…

Q: The residents of two towns both have a mean income of $30,000. Town A has a standard deviation of…

A: Mean income for town A and town B is $30,000. Standard deviation of Town A = $2600. Standard…

Q: A population has mean 7575 and standard deviation 1212. Random samples of size 121121 are taken.…

A:

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: When we are calculating variance (or standard deviation) for a sample and intend to use it as an…

A: Given information: s=∑xi-x¯2N-1s2=∑xi-x¯2N-1

Q: A simple random sample of 64 observations was taken from a large population. The sample mean and the…

A:

Q: Ecem claims that the mean CMN 168 score attained by psychology students is 40. Serdar suspects that…

A:

Q: Suppose that Harry and Ron take an exam for which the mean score is 60 and the score of standard…

A: Given information- Population Mean µ = 60 Standard deviation (σ) = 10 Harry's score = 80

Q: A population has a mean of 75 and a standard deviation of 15. If you randomly sample 9 people from…

A: Mean = 75 Standard deviation = 15 Sample size = 9

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

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: The scores for a standardized reading test are found to be normally distributed with a mean of 300…

A: Given : mean = μ = 300 standard deviation = σ = 40 sample size = n = 490

Q: How would you find the standard deviation by hand, of the following numbers: 1,1,3,01,6,2

A: Standard deviation:Standard deviation quantifies the dispersion of a data set from its mean. The…

Q: A population has a standard deviation of σ = 24. a.  On average, how much difference should exist…

A: Given : A population standard deviation : σ=24. The average distance of sample mean from population…

Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

A: Given that.   X~N( μ , ?^2 )   μ=71   , ?=?  , X=35 , z=-0.60   Z-score =( x - μ )/?

Q: t is known that the average time required to complete a test exam is 80 minutes and the standard…

A: Given Information: Mean μ=80 min Standard deviation σ=10 min. To find how many minutes should the…

Q: For a group of 100 candidates the mean and standard deviation of their marks were found to be 60 and…

A: 1] n=100 2] X¯=603] Standrd deviation σ=154] σ2=225

Q: The lengths of metal bolts are normally distributed with mean μ cm and standard deviation 7 cm. If…

A: Let X be the random variable from normal distribution with mean μ and standard deviation (σ) = 2.5…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Information: Population mean (u) = 165  Standard deviation (σ) = 10  Score earned by a subject…

Q: 2. Roland received a score of 70 for which the mean score was 65.5. Roland has learned that the z-…

A: Given, Z=0.6 μ=65.5

Q: The average age of senators in the 108th Congress was 58 years. If the standard deviation was 11…

A: Average or mean (μ) = 58 years and standard deviation (σ) = 11 years  Then, We will find the z…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: From the provided information, Mean (µ) = 175 Standard deviation (σ) = 10 X~N (175, 10) Here X be a…

Q: A population has a standard deviation of  = 30. A. On average, how much differences should exist…

A: Given Standard deviation (σ) = 30Sample size (n) = 4and standard error = σn…

Q: In simple terms that a normal person can understand. What is population deviation and sample…

A: Difference between the population deviation and sample deviation.

Q: On a final examination in Mathematics, the mean was 76 and the standard deviation was 5. Determine…

A:

Q: on the test was 450 and the standard deviation was 50.  If the board wants to set the passing scores…

A: According to the sum, the board of examiners that administers the real estate broker’s examination…

Q: 2. On a standardized test, Sara had a score of 81, which was exactly 2 standard deviations below the…

A: Given : Test score = X = 81 Standard deviation = σ = 3

Q: Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample…

A: Formula : The standard error of the mean  : σ_x̄ = σ/√n

Q: In a recent​ year, the mean test score was 1539 1539 and the standard deviation was 310 310. The…

A: Given:

Q: A hiring company claims that the variance of the annual salaries for managers is greater in Florida…

A: Let, For Florida, s1 =sample sd = 11000 σ1= population sd n1 = 28 For Georgia, s2 = sample sd =9200…

Q: A population of N=8 scores has a standard deviation of σ=3. What is the value of SS, the sum of the…

A:

Q: The mean age of a random sample 25 people who were playing the slot machines is 48.7 years, and the…

A: That is, there is no evidence to conclude that the mean age of those playing the slot machines is…

Q: A population of scores has a mean of 56. In this population, a raw score of 40 corresponds to a z…

A: Given Information: A population of scores has a mean of 56. μ=56 Raw score X = 40 corresponds to a z…