According to the National Association of Colleges andEmployers Spring 2019 Salary Survey, the averagestarting salary for 2018 college graduates was $50,004. Suppose that the mean starting salary of all2018 college graduates was $50,004 with a standarddeviation of $9200, and that this distribution wasstrongly skewed to the right. Let & be the mean startingsalary of 25 randomly selected 2018 college graduates.Find the mean and the standard deviation of thesampling distribution of &. What are the mean and thestandard deviation of the sampling distribution of & ifthe sample size is 100? How do the shapes of thesampling distributions differ for the two sample sizes?

The provided information is as follows:The average starting salary for 2018 college graduates was…

Answered: According to the National Association…

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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A researcher would like to estimate the mean amount of money that a family spends to within $75. If the amount spent by a family is considered to be normally distributed with a standard deviation of $412, what sample size would be necessary to be 93% confident?
Phyllis, a college business student wants to study how many students in her class study for less than 20 hours per week. Past data reveals that the hours college students study per week has a mean of 29 with standard deviation 9 hours. The normal distribution for the population is shown by the dotted black line. She plans to take a random sample of 36 such college students and will calculate the mean hours studying to compare to the known hours studying. Compute the the mean and standard deviation of the sampling distribution of sample means for a sample of size 36. Round your answers to the nearest tenth. Show your answer by moving the two draggable points to build the sampling distribution.
Suppose that a study of elementary school students reports that the main age at which children begin reading is 5.9 years with the standard deviation of 0.8 years. If a sampling distribution is created using samples of the ages at which 68 children began reading, what would be the standard deviation of the sampling distribution of sample means? Round to 2 decimal places if necessary
Phyllis, a college business student wants to study how many students in her class study for less than 20 hours per week. Past data reveals that the hours college students study per week has a mean of 29 with standard deviation 9 hours. The normal distribution for the population is shown by the dotted black line. She plans to take a random sample of 36 such college students and will calculate the mean hours studying to compare to the known hours studying. Compute the the mean and standard deviation of the sampling distribution of sample means for a sample of size 36. Round your answers to the nearest tenth. Show your answer by moving the two draggable points to build the sampling distribution.
A large corporation employs 19185 individuals. The average income of all employees is $70616, with a standard deviation of $19414 and is skewed to the right. Consider this to be the population distribution. You are given a data set consisting of the incomes of 120 randomly selected employees.
Suppose the true proportion of voters in the county who support a new fire district is 0.62. Consider the sampling distribution for the proportion of supporters with sample size n = 117.What is the mean of this distribution? What is the standard deviation of this distribution?
A recent survey reported that 47% of 18- to 29-year-olds in a certain country own tablets. Use binomial distribution. What are the mean and standard deviation of the number of 18 to 29 year old who will own a tablet in a survey of six?
Suppose you work in the personnel department of a firm that just finished training a group of its employees and you have been requested to review the performance of the trainees on their final examination. The mean and standard deviation of the test scores are 80 and 5. Additional information indicated that the median of the test scores was 75. What type of distribution most likely describes the shape of the test scores? Skewed left Symmetric O There is not enough information to answer this question. O Skewed right
According to the US Census Bureau. the number of people in a household has amean of 2.6 and a standard deviation of 1.5. Suppose the census bureauinstead had estimated this mean using a random sample of 225 homes and that sample had a mean of 2.4 and standar deviation of 1.4. Describe the center and spreadof the sample mean for 225 homes. What does the distribution describe?

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