IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule, what percentage of people have an IQ score between 85 and 115?

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A: Given: X = entrance exam scores X is Normally distributed Mean of X = 558 Standard deviation of X =…

Q: The vocabulary test scores for the population of third graders is normally distributed with a mean…

A: Given, mean=60 Standard deviation=12 To find What percentage of third graders score more than 36,…

Q: When IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is…

A:

Q: What is the formula for STANDARD DEVIATION FOR POPULATION?

A: The standard deviation for population is indicated by the symbol (σ)

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A: Given Mean μ=100, standard deviations σ=15

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Q: A quantitative data set of size 80 has mean 30 and standard deviation 5. At least how many…

A: Given information- Sample size, n = 80 Mean, μ = 30 Standard deviation, σ = 5 We have to find the…

Q: An IQ exam has a mean of 110 and a standard deviation of 12. What percent of people have an IQ score…

A: Given mean= 110 Standard deviation=12 We know that Z=X-mean/standard deviation

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A: Given, Mean = μ =500SD = σ = 50

Q: Assume that a normal distribution of data has a mean of 11 and a standard deviation of 3. Use the…

A: Given : for a normal distribution of data, mean = 11   and standard deviation = 3  To find the…

Q: A test has a mean of 140 and a standard deviation of 27. What proportion of people have scores…

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Q: Approximately what percentage of normally distributed data values will fall within 2 standard…

A: It is known that, normal curve is a symmetric and bell shaped distribution.

Q: Given population mean of 200, a sample of 25 has a standard deviation of 3. Answer ? Standard…

A: Given: Population mean = 200 Sample size = 25 Standard deviation = 3

Q: if a distribution is normal with a population mean = 60 and population standard deviation = 15, what…

A: Let "X" be the scores that is normally distributed.

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A: Note: Please repost 2nd question as i can answer only 1 question as per my policy. 1) Given…

Q: Approximately what percentage of normally distributed data will fall within 2 standard deviations…

A: Based on the Concept of Empirical Rule: About 68% of the area under the curve falls within 1…

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 792 and a…

A:

Q: IQ scores is normally distributed with a mean of 100 and a standard deviation of 15. Using the…

A:

Q: The vocabulary test scores for the population of third graders is normally distributed with a mean…

A:

Q: Calculate the mean, the standard deviation and the 95% confidence interval for the data sets in E…

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Q: an exam score has a mean of 506 and a standard deviation of 100. What exam score corresponds to a…

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Q: What is the percentile rank of the score 65?   In an English test , the mean is 60 and the…

A: Given X=65μ=60σ=6

Q: The test scores of students in a class test has a mean of 70 and with a standard deviation of 12.…

A: Given,mean(μ)=70standard deviation(σ)=12

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Q: Scores on the SAT form a normal distribution with a mean of 500 and standard deviation of 100. If…

A: We have to find the proportion of people who will be accepted.

Q: The weights of men are normally with a mean of 172 pounds and a standard deviation of 29 pounds.…

A: Let X be the random variable from normal distribution with mean (μ) = 172 and standard deviation (σ)…

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 310 and a…

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Q: Historically, heights of women have a bell-shaped with a mean of 162 cm and a standard deviation of…

A: Given that, Historically, heights of women have a bell-shaped with a mean of 162 cm and a standard…

Q: Define the term standard deviation?

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: What is the lowest standard deviation value ?

A: Standard deviation; The standard deviation indicates by how much each observation differs from a…

Q: IQ scores based on the Wechsler Adult Intelligence Scale are assumed to be normally distributed with…

A: Given,mean(μ)=100standard deviation(σ)=15IQ score (X)=90

Q: 4. On a standardized test, scores are normally distributed with a mean of 400 and a standard…

A: GivenMean(μ)=400standard deviation(σ)=80

Q: f the class average is 84

A: Here it is given that - Mean (μ) = 84 Standard Deviation (σ) = 5 Let, X be a random variable which…

Q: Scores on an IQ test are normally distributed with a mean of 50 and a standard deviation of 20.…

A: Given: Mean = 50 Standard deviation (σ) = 20

Q: A standardized measure of achievement motivation is normally distributed, with a mean of 35 and a…

A: it is normally distributed with mean = 35 and sd = 14

Q: What is the standard deviation?

A: We have to calculate the SD for the given frequency distribution.

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15.    In a sample of 500…

A: The normal distribution: A continuous random variable X is said to follow normal distribution with…

Q: The mean IQ score of adults is 100, with a standard deviation of 15. Use the Empirical Rule to find…

A: According to the given information in this question We need to apply empirical rule

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Q: a normal population has mean=56 and standard deviation= 8. what is the 85th percentile of the…

A: Solution:From the given information, normal distribution has population standard deviation 8 and…

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A: X is normally distributed.  Mean = 1800 hours Sigma = 25 hours  X represents the amount of  time a…

Q: Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 85?

A:

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: From the given information,   Mean = 100 Standard deviation = 15   The objective is to find the…

Q: In a normal distribution with a mean of 72 and a standard deviation of 12, what percentage of…

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Q: What is the Standard Deviation?

A: You want to know about standard deviation.We will deeply understand the meaning of standard…

Q: A normal population has a mean  μ = 31 and standard deviation = 8. What proportion of the population…

A: It is given that the mean is 31 and the standard deviation is 8.