The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot bedelivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that theproportion of undeliverable mail has significantly decreased since last year when it was 6%.Which of the following are the correct null and alternative hypotheses for this test?Select one:a. Ho: p = 0.06 versus Ha:p> 0.06b. Ho: p < 0.06 versus Ha: p = 0.06c. Ho: p = 0.06 versus Ha: p < 0.06d. Ho: p < 0.06 versus Ha: p> 0.06geNext pageMoodle Accessibility SpecificationCoastal Carolina University (CCU) does not discriminate on the basis of race, color, religion, sex, sexual orientation, gencnational origin, age, genetic information, mental or physical disability, or status as a disabled or Vietnam-era veteran in itprograms, activities or employment practices. For more information related to discrimination, please contact Title IX, Titloffice phone 843-349-2382: FEN email eenarnastal adur or thelDentof Education office for Civil Pights at www2

Name: The U.S. Postal Service (USPS) is faced with the issue of a large por
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot bedelivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that theproportion

The random variable X follows binomial distribution. X ~ B (n, p) The population proportion is 0.06.…

Math

Statistics

The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot be delivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that the proportion of undeliverable mail has significantly decreased since last year when it was 6%. Which of the following are the correct null and alternative hypotheses for this test? Select one: a. Ho: p = 0.06 versus Ha: p > 0.06 b. Ho: p < 0.06 versus Ha: p = 0.06 c. Ho: p = 0.06 versus Ha: p < 0.06 d. Ho: p< 0.06 versus Ha: p> 0.06

The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot be delivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that the proportion of undeliverable mail has significantly decreased since last year when it was 6%. Which of the following are the correct null and alternative hypotheses for this test? Select one: a. Ho: p = 0.06 versus Ha: p > 0.06 b. Ho: p < 0.06 versus Ha: p = 0.06 c. Ho: p = 0.06 versus Ha: p < 0.06 d. Ho: p< 0.06 versus Ha: p> 0.06

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Commute times in the U.S. are heavily skewed to the right. We select a random sample of 500 people from the 2000 U.S. Census who reported a non-zero commute time. In this sample the mean commute time is 27.6 minutes with a standard deviation of 19.6 minutes. Can we conclude from this data that the mean commute time in the U.S. is less than half an hour? Conduct a hypothesis test at the 5% level of significance. Here is the t-test applet. Click here to open the applet. What can we conclude? Nothing. The distribution of the variable in the population is heavily skewed, so the conditions for use of a t-model are not met. We cannot trust that the p-value is accurate for this reason. With a mean of 27.6 minutes, the data supports the claim that the average commute time is less than 30 minutes, but the difference is not statistically significant. We fail to reject the null hypothesis that the mean commute time in the U.S. in the year 2000 was 30 minutes. With a mean of 27.6 minutes, the…
You may need to use the appropriate technology to answer this question. Is there any difference in the variability in golf scores for players on a women's professional golf tour and players on a men's professional golf tour? A sample of 20 tournament scores from events in a tour for women showed a standard deviation of 2.4671 strokes, and a sample of 30 tournament scores from events in a tour for men showed a standard deviation of 2.2182. Conduct a hypothesis test for equal population variances to determine if there is any statistically significant difference in the variability of golf scores for male and female professional golfers. Use a = 0.10. State the null and alternative hypotheses. Ho: Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Reject Ho. We cannot conclude that there is a difference in the variability of golf scores for male and female…
The Titanic was a British passenger liner that sank in the North Atlantic Ocean in 1912, after colliding with an iceberg during her maiden voyage from Southampton to New York City. The sinking caused more than 1,500 passengers and crew to die, making it one of the deadliest peacetime maritime disasters in modern history. The Titanic catastrophe is not only famous for the movie, but also it allows several types of statistical analyses, and is therefore a popular case study in statistics texts. One of these analyses focuses on the following question: who survived the sinking? "Women and children first" is a code of conduct dating from 1852, whereby the lives of women and children were to be saved first in a life-threatening situation, typically abandoning ship, when survival resources such as lifeboats were limited. But is it indeed true that women and children had the best perspectives to survive? This data set has the survival data for the passengers on the Titanic. Also, for each…
Why would manufacturers and businesses be interested in construeting a confidence interval for the population variance? Would they want large or small variances?
While continuing to keep abreast of local trends in education, a school administrator read an article that reported only 42% of high school students study on a regular basis. He claims that this percentage is too low for his district. State the null and alternative hypotheses for the given scenario.
High levels of blood sugar are associated with an increased risk of type 2 diabetes. A level higher than normal is referred to as “impaired fasting glucose.” An article reports a study in which 47 of 155 people with impaired fasting glucose had type 2 diabetes. Consider this to be a simple random sample. A doctor claims that less than 35% of people with impaired fasting glucose have type 2 diabetes. With what level of confidence can this claim be made? (Express the final answer as a percent.)
What is the smallest sample size required to provide a 95% confidence interval for a mean, if it important that the interval be no longer than 1cm? You may assume that the population is normal with variance 9cm2 . 1. n=1245 2. n=34 3. n=95 4. n =139
Answer the following True or False: Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null hypothesis is actually true, then there is a 5% chance that the researcher will end up accepting the alternative hypothesis in error. false true
The cost of a university education has increased at a much faster rate than other living expenses in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. Suppose a hypothesis test is done to test this belief. A random sample of 20 students was selected, and it was found that the sample mean is 20.4 and the standard deviation is 11.891. compare t* ( critical value of t) at an x level of 5% and the test statistic to draw a conclusion about the hypothesis. Choose the correct answer. we fail to reject the null hypothesis. There is strong evidence to suggest that students work more than 20 hours per week, on average. we support the alternative hypothesis; there is strong evidence to suggest that students work more than 20 hours per week. we reject the null hypothesis. we fail to reject the null…
Some people are concerned that new tougher standards and high stakes tests adopted in many states may drive up the dropout rate. The National Center for Education Statistics reported that the high school dropout rate for the year 2000 was 10.9%. One school district, whose dropout rate has always been very close to the national average, reports that 210 of their 1782 students dropped out last year. Use this sample data and a 0.05 significance level to test the claim that the national high school dropout rate is now greater than 10.9%. the p values: initial conclusion: a final conclusion about the original claim:
Even if a treatment has no effect, it is still possible to obtain an extreme sample mean that is very different from the population mean. Which outcome is likely if this happens?
The area of inferential statistics called hypothesis testing is a decision-making process for evaluating claims about a population parameter, based on information obtained from samples. True or false