Hypothesis Testing

In Dallas, some fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At a = .01, did the yellow fire trucks have a significantly lower accident rate? (a) Stat the hypothesis. (b) State the decision rule and sketch it. (c) Find the sample proportions and z test statistic. (d) Make a decision. (e) Find the p-value and interpret it. (f) If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why? (g) Is the normality assumption fulfilled? Explain.

In Dallas, some fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At a = .01, did the yellow fire trucks have a significantly lower accident rate? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the sample proportions an

Stat problem

I need answers and solution the attached questions. This is very urgent ASAP please Thank u ps: I need the answers to the following questions from the book: Statistics for managers using Microsoft excel 5th edition Problem: Question 8-67: Companies are spending more time screening applicants than in the past. A stud

5 step five hypothesis

Five Step Hypothesis Null should be: There is a difference between male and female salaries at all levels ALternate should be: There is no difference between male and female salaries at all levels. The conclusion of the parametric should be "Do Not Reject Ho" contingency table Observed Educat

Null and alternative hypothesis

Part 1 For the following investigative scenarios, state the null hypothesis, and the alternative hypothesis. Also identify the Type 1 and Type 2 errors which can result based on the hypotheses that you defined. (a) You are a member of the HR department and a number of employees have to come to you claiming tha

(Statistics) Hypothesis Testing

Testing Hypothesis. Identify the null hypothesis, alternative hypothesis, test statistics, P-value or critical value (s), conclusion about the null hypothesis, and final conclusion that address the original claim. Use the P-value method unless your instructor specifies otherwise. A random sample of 100 babies is obtained, and

Statistics

The following data represent a sample of 7 patients who had a complete response to a stem cell transplant as measured by blood and urine tests. Two measurements were taken: the first immediately prior to the stem cell transplant, and the second at the time of the complete response. Patient 1 2 3 4 5 6 7 Before 158 189 20

Question on statistic

I am looking for solutions on the attached questions please. I would like to have answers and their solutions> like this i can learn to solve them myself. BUSN 5760 Final Exam Problems: Set up and solve each of the following problems using the Excel files on the course website. Print the output and have it ready BEFORE tak

Statistics multiple choice questions

Use the following information to answer questions 11-16: Accounting procedures allow a business to evaluate their inventory at LIFO (Last In First Out) or FIFO (First In First Out). A manufacturer evaluated its finished goods inventory (in $ thousands) for five products both ways. Based on the following results, is LIFO mor

Statistic Problems

1.You are visiting Dad's Root Beer Plant in Oakland. You are asked by the plant supervisor to determine if the Dad's Brand soda machines are correctly dispensing 32 ounces of root beer. In the past, the equipment was assumed to be not working properly if the cans were over-filled or under-filled. You observe the machine filling

1-2 pages, .doc file

Company W is testing a sales software. Their salesforce of 500 people is divided into four regions: Northeast, Southeast, Central and West. Each sales person is expected to sell the same amount of products. During the last 3 months, only half of the sales representatives in each region were given the software program to help the

Utilizing the 5-Step Hypothesis Testing Process

Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking even if they are not exposed to the usual pattern of sunlight. To test this notion, eight paid volunteers were placed (individua

Word paper and sources

300 word paper a little more is fine...... explain the role of statistics in research.... Statistics and its role in psychological research

One tailed or two tailed alternative ?

For each of the following hypotheses, decide whether a one-tailed or two-tailed test would be performed: a. Children with birth defects will score differently than the normal population on a measure of self-esteem. b. Smoking affects the short-term memory in individuals. c. People from Asia will score similarly as North Amer

Null hypothesis and one-tailed/two-tailed test

A researcher is looking at the relationship between home-schooling and achievement. She is hypothesizing that the home-schooled children will score higher than non home-schooled children on a standardized achievement test. a. What is the null hypothesis? b. What is the alternative hypothesis? (Remember that every possibility

Solving a Hypothesis Testing Question

Problem: You are working with a piece of manufacturing machinery that fills pouches; the pouch weight is supposed to be 8.8 ounces after being filled; you have been asked to see if the average weight is different from 8.8 ounces at the 0.05 level of significance. You have a sample of 14 filled pouches with the following wei

Hypothesis Testing Problems for Real Estate Data

Using the same data set used in my previous paper (see attached), I need to prepare a paper describing a new hypothesis test using a different statistic (large sample size,small sample, means and /or proportions, one and two-tailed tests) and performing the five-step hypothesis test again on that data for real estate (homes pool

Nonparametric Hypothesis Test: Scheffe's test

I need to conduct a nonparametric test of hypothesis. I want to use the Scheffe's nonparametric test as the "equivalent, nonparametric test" in the problem. H0: There is no significant difference within the annual mean earning wages of Hispanic and Non Hispanic H1: There is significant difference within the mean earning wa

Nonparametric HypothesisTesting

Nonparametric Hypothesis Testing Step 1: State the Null Hypothesis and Alternate Hypothesis Ho: No significant difference within the annual mean earning wages of Hispanic and Non-Hispanic. H1: A significant difference does exist within the mean earning wages of Hispanic and Non-Hispanic.

Standard Deviation

A recent survey indicated that the average amount spent for breakfast by business managers was $7.58 with a standard deviation of $0.42. It was felt that breakfasts on the West Coast were higher thatn $7.58 A sample of 81 business managers on the West Coast had an average breakfast cost of $7.65. At a(alpha) =0.05 what is the

Is it reasonable to conclude the percent is less now than five years ago?

58. The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity). An economist selected a sample of 20 homeowners in New England and then calculated these total housing

Significance Level

42. During recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasts 3 hours and 30 minutes. A sample of 17 games revealed the following times to completion. (Note that the minutes have been changed to fractions of hours, so that a game that lasted 2 hou

Testing a hypothesis in 5-steps

A new process for producing synthetic diamonds can be operated at a profitable level only if the average weight of the diamonds produced by the process is greater than 0.5 karat. To evaluate the profitability of the process, a sample of six diamonds was generated using this new process, with recorded weights .46, .61, .52, .48,

Techniques for Decision Analysis

Where can we use Decision Analysis? Please express your views on where you could apply different techniques for Decision Analysis.

You're trying to explain null and alternative hypotheses to one of the senior managers at Company W and he's not "getting it"...

You're trying to explain null and alternative hypotheses to one of the senior managers at Company W and he's not "getting it" when you use snack food sales. Help him by thinking about a business problem in another organization or department. Formulate a null hypothesis and the corresponding alternative hypothesis that could be t

Pronto Pizza Case Study: Data Analysis

[See attachment for case study] Tony has asked you for some assistance in interpreting the data that he has collected. In particular, he needs to know if the true average delivery time for Pronto Pizza is greater than 25 minutes. Use the data in the file PRONTO.XLSX to answer his question. A description of this data set is gi

Base statistics

What is you numeric and verbal hypothesis statement regarding your research? Verbal: If a baseball team has a salary greater than the mean amount, then the wins for that year will be greater than 75. Alternate: If a baseball team has a salary less than the mean amount, then the wins for that year will be less than

Levels of Significance and Hypothesis Testing

9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard

Hypothesis testing problems

1) At the .01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? What is the p-value? 2) At the .05 significance level, is there a difference in the mean waiting time?

27. A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below Statistic Men Women Sample mean 24.51 22.69 Population standard deviation 4.48 3.86 Sample size 35 40 At the .01 significance level, is there a difference in the mean number

P-Value of Weight Loss

31. A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on the average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. At the .05 level of