Scores for a common standardized college aptitude test are normally distributed with a mean of 483 and a standard deviation of 96. randomly selected men are giving a test preparation course before taking this test so much for sake of argument that the test is no effect —one of the men is randomly selected by the probability that his score is at least 520.4 — if 19 of the men are randomly selected find the probability that the mean score is at least 520.4 enter your answer as a number accurate to what does replaces note answers obtain using exact z score or z scores rounded to three different places are acceptable. 

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the…

A: From the provided information,Mean (µ) = 162000Standard deviation (σ) = 36000Sample size (n) = 58

Q: No distibilor believes the amount of beer in a 12-ounce can of beer has a normal ibution with a mean…

A: A beer distributor believes that amount of beer in a 12 ounce can of beer has a normal distribution…

Q: expected number of students who read the book online.

A: Students purchased hard copy =P(H) = 60% =0.60 Students print out from the web =P(W)= 25% = 0.25…

Q: A school district official intends to use the mean of a random sample of 125 sixth graders to…

A:

Q: A population has a mean of 200 and a standard deviation of 25. A sample of 64 observations will be…

A: We have to find out given probabiity..

Q: .. Lori just bought a set of 4 tires for her car. The life of a tire is normally distributed with a…

A:

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

Q: The probability that it snows in a particular city on any given winter day is 13%. What is the…

A: Given that the probability that it snows in a particular city on any given winter day is 13%. Let,…

Q: Suppose that the distribution of the scores of students in Statistics Assignment 1 is roughly…

A: GivenMean(μ)=85standard deviation(σ)=5sample size(n)=16

Q: If a z-score is 0, it is on the mean. True or False

A:

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: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 14, 16, 18,…

A: Given observation SAMPLE of scores is: 14, 16, 18, 13, 13, 19, 21, 11 n = 8

Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…

A:

Q: Mathematics majors generally have one of the highest starting salaries. Suppose the average starting…

A: For Normal distribution z score = (x-μ)/σx

Q: r a standardized psychology examination intended for psychology majors, the historical data show…

A: Given: The corresponding z score can be calculated as: The distribution will be normal as the…

Q: Suppose a professor wants to know if students in her statistics class have a good grasp of basic…

A: Given: Sample size n=6 Sample mean x¯=∑i=1nXin=62+92+75+68+83+956=79.167 Sample standard deviation…

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

A: Given information:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: Let X be a normal random variable with mean 2 and standard deviation 1. Which of the following…

A: Given that Let X denotes the normal distribution with mean=2 and standard deviation =1  Then we have…

Q: Marcos took the EnggMath3 exam decided to guess on a 10-item multiple choice. Each problem has 5…

A: # x be the no of answers correct follow binomial distribution (n=10, p=1/5)  1): then to find…

Q: Entry to a certain university is determined by a national test. The scores on this test are normally…

A:

Q: res light bulbs that have a length of life that is normally distributed with mean equal to 821 hours…

A:

Q: A final exam in science 160 has a mean of 73 with a standard deviation of 7.8. If 25 students are…

A: Given information- Population mean, µ = 73 Population standard deviation, σ = 7.8 Sample size, n =…

Q: A final exam in Science 150  has a mean of 80 with a standard deviation of 8. If 25 students are…

A: Given: μ = 80 σ = 8 n = 25

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

A: Let X = IQ of an individual.  The probability that the person has an IQ greater than 140.

Q: A statistics instructor gives two different tests to measure students' aptitude for statistics.…

A: We have given that, Mean1 = 22 and standard deviation1 = 5. Mean2 = 71 and standard deviation2 =…

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 15, 17, 19,…

A: Given data is 15, 17, 19, 22, 10, 23, 16, 15S.S=122.88

Q: The average hourly wage for manufacturing workers in the United States is $16.08 per hour, with a…

A: For the distribution (specified to be normal) of the hourly wage (in ) for manufacturing workers in…

Q: A sample of 9 freshmen takes a reading comprehension test and their scores are a mean of 10 and…

A: Consider that μ defines the population mean score.

Q: James and Harry play baseball and each of them can score one goal with the probabilities of 0.4 and…

A:

Q: A professor using an open-source introductory statistics book predicts that 60% of the students will…

A: given data, 60% - student will purchase a hard copy of the book,25%- will print it out from the…

Q: How do I do this problem?

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: CAN SOMEONE HELP ME SOLVE THIS WORD PROBLEM?

A: It was stated that for a standardized psychology examination intended for psychology majors, the…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: According to government data the probability that an adult was never in a museum is 11%, in a random…

A: Givenp=0.11sample size(n)=20Let "x" be the no.that were never in a…

Q: He found that the table stated his probability as 0.1131. Determine whether Alex made an error in…

A: Let X be the random variable that Alex's home run hitting distance.Given that,

Q: the mean IQ of tweleve year old boys in a school district is 118; the standard deviation is 18. if a…

A: Obtain the probability that the mean of the sample is greater than 120. The probability that the…

Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

A:

Q: About 75% of all female heart transplant patients will survive for at least 3 years. Sixty female…

A:

Q: For example, let us assume that the mean quantity of cholesterol in eggs is 185 milligrams with a…

A:

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 survey will be taken.…

A: Given Data: Let X represent the random variable Mean=80 SD=7   n=49 M~ Normal(80,7249)

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.