The scores on a​ driver's test are normally distributed with a mean of 100.   Find the score that is 3 standard deviations above the​ mean, if the standard deviation is 30.

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Formula : Let , mean = μ and standard deviation = σ The test score below 'a' standard deviation of…

Q: The average full-time faculty member in a post-secondary degree granting institution works an…

A:

Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…

A: Here, mean is 105 and standard deviation is 10.

Q: A student obtained the mean and standard deviation of 100 observations as 40 and 5.1 respectively.…

A: The original mean is 40 and original standard deviation is 5.1 Student wrongly copied one…

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…

Q: Sofia Earned a score of 460 on exam A that had a mean of 400 and a standard deviation of 20 she's…

A: Solution

Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…

A: Let X denote the scores on a standardized test. Given that X follows N(mean = 105, SD = 10)

Q: The scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A:

Q: The mean and standard deviation for last year's final exam were 69 and 10, respectively. This year,…

A:

Q: assume that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If…

A: Here we need to find x such that P (X>x)=0.01, where X~N(100,15).

Q: The scores on a test are normally distributed with a mean of 110 and a standard deviation of 22.…

A: Let X be the random variable from Normal distribution with mean (μ) = 110 and standard deviation (σ)…

Q: Two players, Fredo and Karl, on different teams wanted to find out who scored the higher number of…

A:

Q: he scores on a standardized test are normally distributed with a mean of 105 and standard deviation…

A: Consider X be the random variable representing the he scores on a standardized test.    X is…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A:

Q: If the professor grades on a curve​ (for example, the professor could give​ A's to the top​ 10% of…

A: The z-score for grade of 81 is, z=81-729=99=1 The z-score for grade of 75 is, z=75-674=84=2

Q: A highly selective boarding school will only admit students who place at least 1.5 standard…

A: Given data,Mean μ=300sd    σ=24z-score is z=1.5Minimum score (x)=?

Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation…

A: Let k is 0.6 standard deviation below the mean.  That means -0.6 is the z score of the value.…

Q: The scores on a standardized test are normally distributed with a mean of 85 and standard deviation…

A: If X be the scores. It is known- X~N85, 202 where, m: mean = 85 s: standard deviation = 20

Q: The distribution of raw scores on a particular achievement test has a mean of 500 and a standard…

A: Ans:- Given, The distribution of raw scores on a particular achievement test has a mean of 500 and a…

Q: A cohort of patients have lost on average 23 pounds and the standard deviation of the sample is 1.2…

A: We have been given that a cohort of patients have lost on average 23 pounds and the standard…

Q: The scores on a standardized test are normally distributed with a mean of 110 and standard deviation…

A: The given information is that the score on a standardized test are distributed normally with mean…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Let "X" be the test score. Find z-score (z): The z-score is the measure of how far the standard…

Q: The mean total serum cholesterol level in women free of cardiovascular disease is 205 with a…

A: The independent variable is total serum cholesterol level in women free of cardiovascular disease.…

Q: The scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A: Given that, Mean of 120 Standard deviation of 20.

Q: The scores on a standardized test are normally distributed with a mean of 85 and standard deviation…

A: Since z-score is a measure of how far the standard deviation is away from the mean (Above/below).…

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…

A: Let  x denote the length of pregnancies. Given that the lengths of pregnancies are normally…

Q: The scores on a standardized test are normally distributed with a mean of 80 and standard deviation…

A:

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: In a recent awards ceremony, the age of the winner for best actor was 37 and the age of the winner…

A: From the given information, Age of actor=37μactor=47.3σactor=7.2 Z score for Actor is,…

Q: In order to determine the time required to complete a chemical analysis, 25 observations were made;…

A:

Q: he scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117…

A:

Q: The scores on a standardized test are normally distributed with a mean of 100 and standard deviation…

A: Let "x" be the test score.

Q: The scores on a standardized test are normally distributed with a mean of 100 and standard deviation…

A: Given data,Mean μ=100sd     σ=15If z-score=0.8x=?

Q: The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation…

A: Given: Population mean and standard deviation: Also given, P(X < x) = 0.03 We have to find…

Q: Ten years ago the mean Math SAT score of all high school students who took the exam in a small high…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: Since z-score is the measure of how far is the standard deviations from the mean. Z-score would be…

Q: uppose at the end of the year everyone at Bob’s restaurant gets a 5 percent raise per hour to their…

A: Define the Random Variable, X : Wage per hour of an  employee at Bob's restaurant at the current…

Q: The scores on a standardized test are normally distributed with a mean of 80 and standard deviation…

A:

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Mean = 95 Standard deviation = 2

Q: The winner for Best Male Actor is 35 years old and winn3er for Best Female Actress is 47.  The mean…

A: The z-score for male actor is, z=x-μσ=35-45.15.9=-10.15.9=-1.71 The z-score for male actor is -1.71.…

Q: The scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A: Given that,  μ=120,σ=5,z-score = 1.1 The formula for calculating the test score is

Q: Suppose the scores on a difficult exam have a sample mean of 67 and a standard deviation of 20.…

A: Given - Sample mean , Sample standard deviation,

Q: he scores on a standardized test are normally distributed with a mean of 115 and standard deviation…

A: The scores on a standardized test are normally distributed with Mean = 115 Standard deviation = 20

Q: The length of life of an instrument produced by a machine has a normal distribution with a mean of…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The average of the final exam grades of a course attended by four hundred students is calculated as…

A:

Q: What sample size is needed if the agency wants to be 99% confident of being correct to within ±5…

A: Here given An advertising agency that serves a major radio station wants to estimate the mean amount…

Q: On an exam, there is a mean score of 80 with a standard deviation of 12 If each exam is multiplied…

A: we want to find each exam is multiplied by 1.2, New  will mean and new standard deviation are...