Explore BrainMass
Share

# Hypothesis Testing

### Perform hypothesis testing for AIU databases

Using AIU's large database of survey responses from the AIU data set, complete the following: Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the ap

### Sample observations and test hypothesis

Exercise 3. Macaray Homes is developing two parcels near Globe Arizona. In order to test different advertising approaches, they use different media to reach potential buyers. The mean annual family income for 75 people making inquiries at the first development is \$150,000, with a standard deviation of \$40,000. A correspondin

### Sample

1. A researcher wishes to test the claim that the average age of lifeguards in Ocean City is greater than 24 years. She selects a sample of 36 guards and finds the mean of the sample to be 24.7 years with a standard deviation of 2 years. Is there evidence to support her claim at a 95% level of confidence? 2. Consider the fo

### Software Program to Manage Contacts

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

### Mean Selling Time for Farm Associates Real Estate

A statewide real estate sales agency, Farm Associates, specializes in selling farm property in the state of Nebraska. Its records indicate that the mean selling time of farm property is 90 days. Because of recent drought conditions, the agency believes that the mean selling time is now greater than 90 days. A statewide survey of

### Difference in Variance and Decision Rule

A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of \$5.29 with a standard deviation of \$3.02. For the October 26 evening showing of the same movie, for a sample of 25 purchases the mean was \$5.12 with the standard deviation of \$2.14. The means appear to be very close,

### Hypothesis Testing

Does lovastatin (a cholesterol lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heat attack, compared with 97 for the inactive pill. (a) State the ap

### 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.