The manager of the Danvers-Hilton Resort Hotel stated that the mean guest bill for a weekend is $600 (the population). A member of the hotel's accounting staff noticed that the total charges for guest bills have been increasing in recent months. The accountant will use a sample of future weekend guest bills to test the manager's claim that the sample of bills are greater than the population mean of $600. Which hypothesis test should be used to test the manager's claim? Group of answer choices a) Three-tailed test b) None of the answers c) One-tailed test d) Two-tailed test

The manager of the Danvers-Hilton Resort Hotel stated that the mean guest bill for a weekend is $600 (the population). A member of the hotel's accounting staff noticed that the total charges for guest bills have been increasing in recent months. The accountant will use a sample of future weekend guest bills to test the manager's claim that the sample of bills are greater than the population mean of $600. Which hypothesis test should be used to test the manager's claim? Group of answer choices a) Three-tailed test b) None of the answers c) One-tailed test d) Two-tailed test

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Explain the b) and c) questions.
Come up with a real-life situation in which you might be curious to know if there is a difference between two means (averages). State the null and alternative hypothesis of your real-life situation.
A professor using an open-source introductory statistics book predicts that 60% of the students will purchase a hard copy of the book, 25% will print it out from the web, and 15% will read it online. She has 200 students this semester. Assuming that the professor's predictions were correct, calculate the expected number of students who read the book online.
The mean annual salary of (public) classroom teachers is $55.4 thousand. A hypothesis test is to be performed to decide whether the mean annual salary of classroom teachers in Ohio is greater than the national mean. What is the classification of the hypothesis test?
The mean purchase total is $93.80 and the median purchase total is $75.80. The store manager investigates and learns that the customer that made a $500 purchase had not purchased groceries, but rather a $500 gift card. Because this customer's purchase was not typical, the manager decides to exclude this total from the data set. How will removing the $500 purchase from the data set affect the value of the mean and the median?
Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the viewing audience in the area. In a survey of 100 viewers, 47% indicated that they watch the late evening news on this local CBS station. What is the test statistic?
Suppose the null hypothesis is not rejected. State the conclusion based on the results of the test. Three years ago, the mean price of a single-family home was $243,712. A real estate broker believes that the mean price has increased since then. Which of the following is the correct conclusion? A. There is not sufficient evidence to conclude that the mean price of a single-family home has not changed. B. There is not sufficient evidence to conclude that the mean price of a single-family home has increased. C. There is sufficient evidence to conclude that the mean price of a single-family home has not changed. D. There is sufficient evidence to conclude that the mean price of a single-family home has increased.
According to the U.S. Census Bureau, the average household income was $73,298 in 2014 (the latest year for which complete data is available). The median household income in 2014 was $53,719. Does a $20,000 difference seem like a big deal in these two different measures? What explains the discrepancy? Which measure do you think better captures the central tendency (or lay person’s sense of “average”) of the distribution of income in this country?
A psychologist wanted to know if students in her class were more likely to cheat if they were low achievers. She divided her 60 students into three groups (low, middle, and high) based on their mean exam score on the previous three tests. She then asked them to rate how likely they were to cheat on an exam if the opportunity presented itself with a very limited chance for consequences. The students rated their desire to cheat on a scale ranging from 1-100, with lower numbers indicating less desire to cheat. Before opening the data, what would you hypothesize about this research question? Open the data set. Before running any statistical analyses, glance through the data. Do you think that your hypothesis will be supported? Conduct descriptive analyses and report them here. Conduct a one-way ANOVA. Report your statistical findings (including any applicable tables in APA format) here. What would you conclude from this analysis? What would be your next steps, if this…
In the 1980's it was believed that congenital abnormalities affected about 5.4% of the nation's children. Some people believe that an increase in the chemicals in the environment has led to an increase in the number of abnormalities. A recent study examined 400 randomly selected children and found that 29 of them showed signs of an abnormality. Does this provide evidence that the risk of congenital abnormalities has increase? Use a 0.05 to make your decision. What is the resulting test statistics?
A psychological study wants to analyze the relationship between anxiety and binge drinking; a questionnaire for anxiety and questionnaire for binge drinking is administered to each subject. What would be a good statistical test to test the hypothesis?
You saw back in Chapter 2 that the mean, median, mode, and midrange are used to indicate where data is centered in a data set, or in other words what a typical value in the set is. A question that is often asked is, "If they're all supposed to do the same thing, why is there more than one?" Isn't one enough? In this exercise, you will be given two small sets of data. For each set, a. find the mean, median, mode and midrange b. in your opinion, decide which of the measures BEST represents all the values in the set (best indicates a typical value), and which one does this the WORST. c. post your responses and justify them by explaining why Don't forget to respond to at least one of your classmate's posts. With this exercise, "more is better." I'll elaborate after the deadline. • Set A: the salaries of 10 employees at a company (in thousands of dollars): 50, 50, 50, 50, 50, 50, 50, 50, 50, 500 • Set B: the grades of 9 students on an exam: 20, 25, 30, 35, 40, 45, 100, 100, 100