Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey,assume the mean annual salary for graduates 10 years after graduation is 142000 dollars. Assume thestandard deviation is 36000 dollars. Suppose you take a simple random sample of 90 graduates.Find the probability that a single randomly selected salary that doesn't exceed 145000 dollars.Answer =Find the probability that a sample of size n = 90 is randomly selected with a mean that that doesn'texceed 145000 dollars.Answer =Enter your answers as numbers accurate to 4 decimal places.

Answered: Business Weekly conducted a survey of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, the mean annual salary for graduates 10 years after graduation is 143000 dollars and the standard deviation is 32000 dollars. Suppose you take a simple random sample of 57 graduates. Assume that the population of all salaries for MBA graduates is normally distributed.Enter your answers as numbers accurate to 4 decimal places.Find the probability that a single randomly selected salary that doesn't exceed 147000 dollars.Answer = Find the probability that a sample of size n=57n=57 is randomly selected with a mean that that doesn't exceed 147000 dollars.Answer =
A large study of the heights of 550 adult men found that the mean height was 71 inches tall. The standard deviation was 7 inches. If the distribution of data was normal, what is the probability that a randomly selected male from the study was between 50 and 85 inches tall? Use the 68-95-99.7 rule (sometimes called the Empirical rule or the Standard Deviation rule). For example, enter 0.68, NOT 68 or 68%. Answer = (Write your answer in decimal form, not percentage form. For example, if your percentage is 99%, enter 0.99, not 99. Round your answer to three decimal places.) Caution: Using tables or Excel for this may produce a wrong answer. Use the 68-95-99.7 rule.
The time taken to complete an exam folows a normal probability distribution with a mean of 60 minutes and standard deviation of 10 minutes. What is the probability that a randomly chosen student will complete the exam in 50 minutes or longer?
The life of a vacuum cleaner is normally disyributed with mean 5 years and standard deviation 2 year. find the probability that it lasts less than 4 years.
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability of randomly selected adult has an IQ score less than 115.
According to the latest internet usage survey of college students, the amount of time spent on social media per day is normally distributed with a mean equal to 210 minutes and a standard deviation of 45 minutes. Based on this survey, find the probability that the amount of time spent on social media by college students is between 150 and 300 minutes per day. Round answer to 4 decimal places.
The amount of time it takes students to complete a biology exam is normally distributed with a population mean of 120 minutes and standard deviation of 30 minutes. What is the probability that 25 randomly selected students will take longer than 135 minutes?
Assume that adults have IQ scores that are normally distributed with a mean of 98 and standard deviation of 15. Find the probability that a randomly selected adult has an IQ greater than 104.
Assume that the square footage of a residential house in the US is normally distributed with a mean=1000 and standard deviation=150 square feet. If we select a random house what is the probability that it will be at most 1050 square feet?
3. You are being consulted by a level 400 psychology student on her final project. Her work entails estimating the proportion of students in University of Ghana who are claustrophobic i.e. having an extreme or irrational fear of confined places. a) What is the population in her case? b) Would you advise a complete enumeration of the population or a survey? Give reasons. c) Describe a sampling method you think will help her obtain the best estimate of the proportion of claustrophobic students in population. Justify the selected sampling method and enumerate its advantages over at least one other sampling method you know.
The average age of the JYP employees is known to be 32 years and the standard deviation is 5 years. Find the probability that a random sample of 36 employees will have an average age of less than 30 years. What is the probability of 36 employees who have an average age of less than 30 years?
A survey reported that in a recent year, the mean serum cholesterol level in milligrams per deciliter for U.S. adults was 198 with a standard deviation of 43. A random sample of 110 adults was chosen. What is the probability that the mean cholesterol level is between 193 and 202?

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