High school graduates: The National Center for Educational Statistics reported that 82% of freshmen entering public...

High school graduates: The National Center for Educational Statistics reported that 82% of freshmen entering public high schools in the U.S. in 2009 graduated with their class in 2013. A random sample of 135 freshmen is chosen.

a.	Page 333 Find the mean μ.
b.	Find the standard deviation σ.
c.	Find the probability that less than 80% of freshmen in the sample graduated.
d.	Find the probability that the sample proportion of students who graduated is between 0.75 and 0.85.
e.	Find the probability that more than 75% of freshmen in the sample graduated.
f.	Would it be unusual if the sample proportion of students who graduated were more than 0.90?

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

High school graduates: Approximately 78% of freshmen entering public high schools in the United States in...

High school graduates: Approximately 78% of freshmen entering public high schools in the United States in 2005 graduated with their class in 2009. A random sample of 128 freshmen is chosen. (a)Find the mean μp .(b)Find the standard deviation σp . (c)Find the probability that less than 91% of freshmen in the sample graduated. (d)Find the probability that between 68%and 83% of freshmen in the sample graduated. (e)Find the probability that more than 68%of freshmen in the sample graduated.Cumulative Normal...

High school graduates: Approximately 78% of freshmen entering public high schools in the United States in...

High school graduates: Approximately 78% of freshmen entering public high schools in the United States in 2005 graduated with their class in 2009 . A random sample of 128 freshmen is chosen. Use (a)Find the mean μp .(b)Find the standard deviation σp . (c)Find the probability that less than 91% of freshmen in the sample graduated. (d)Find the probability that between 68% and 83% of freshmen in the sample graduated. (e)Find the probability that more than 68% of freshmen in...

High school graduates: Approximately 74% of freshmen entering public high schools in the United States in...

High school graduates: Approximately 74% of freshmen entering public high schools in the United States in 2005 graduated with their class in 2009 . A random sample of 175 freshmen is chosen. Use Cumulative Normal Distribution Table as needed. Round your answers to at least four decimal places if necessary. (a)Find the mean μp . The mean μp is . Part 2 of 6 (b)Find the standard deviation σp . The standard deviation σp is . Part 3 of 6...

The National Center of Education Statistics conducted a survey of high school seniors,

5.20 High School and Beyond, Part I: The National Center of Education Statistics conducted a survey of high school seniors, collecting test data on reading, writing, and several other subjects. Here we examine a simple random sample of 200 students from this survey. Side-by-side box plots of reading and writing scores as well as a histogram of the differences in scores are shown below. (b) Create hypotheses appropriate for the following research question: is there an evident difference in the average...

The National Center of Education Statistics conducted a survey of high school seniors

High School and Beyond, Part l. The National Center of Education Statistics conducted a survey of high school seniors, collecting test data on reading, writing, and several other subjects. Here we examine a simple random sample of 200 students from this survey. A histogram of the difference in the reading and writing score of each student is shown below. .1. Which set of hypotheses is appropriate for the following research question: is there an significant difference in the average scores of students...

2. As reported by the U.S. national center for health statistics. The mean serum high density...

2. As reported by the U.S. national center for health statistics. The mean serum high density lipoprotein cholesterol of females 20 to 29 years old is μ=53, if serum HDL cholesterol is normally distributed with σ=13.4, answer the following questions: A. What is the probability that a randomly selected female 20 to 29 years old has Serum cholesterol above 60? B. What is the probability that a randomly sample of 15 female 20 to 29 years old has mean Serum...

74% of freshmen entering public high schools in 2006 graduated with their class in 2010. A...

74% of freshmen entering public high schools in 2006 graduated with their class in 2010. A random sample of 81 freshmen is selected. Find the probability that the proportion of students who graduated is greater than 0.750 . Write only a number as your answer. Round to 4 decimal places (for example 0.1048). Do not write as a percentage.

The National Center of Education Statistics conducted a surveyof high school seniors, collecting test data...

The National Center of Education Statistics conducted a survey of high school seniors, collecting test data on reading, writing, and several other subjects. Here we examine a simple random sample of 200 students from this survey. Side-by-side box plots of reading and writing scores as well as a histogram of the differences in scores are shown below.(a) Is there a clear difference in the average reading and writing scores?(b) Are the reading and writing scores of each student independent of...

Approximently 72% of freshmen entering public high schools in the United States in 2005 graduated with...

Approximently 72% of freshmen entering public high schools in the United States in 2005 graduated with their class in 2009. A random sample of 136 freshmen is chosen. around your answers to four decimal places as needed. Part 1 of 6 Find the mean u ^p is

The article "College Graduates Break Even by Age 33" reported that 5.7% of high school graduates...

The article "College Graduates Break Even by Age 33" reported that 5.7% of high school graduates were unemployed in 2008 and 9.7% of high school graduates were unemployed in 2009.† Suppose that the reported percentages were based on independently selected representative samples of 300 high school graduates in each of these two years. (a)Construct a 99% confidence interval for the difference in the proportion of high school graduates who were unemployed in these two years. (Use p2008 − p2009. Round...

Subjects