Explore BrainMass

# Hypothesis Testing

### Methodology Involved in Hypothesis Testing

I need to complete the following - please help me so I can expand on your ideas: Complete and submit a 1000-word report describing the methodology involved in Hypothesis testing. It is required that you include an example of a business situation in which hypothesis testing can utilized.

### Hypothesis Testing: Significance Difference in GPAs

You conduct a survey of a sample of 25 members of this year's graduating marketing students and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this year's students significantly different from the long-run average? At what alpha l

### Testing of hypothesis problems for proportions

10.2 Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value. a. Dissatisfied workers in two companies: x1 = 40, n1 = 100, x2 = 30, n2 = 100, &#945; = .05, two tailed test. b. Rooms rented at least a week in advance at two hotels: x1 = 24, n1 = 200, x2 = 12, n2 = 50, &#945

### Sample Average and Standard Deviations

Please do # 2, 3 and 5. 2. In a 2-week study of the productivity of workers, the following data were obtained on the total number of acceptable pieces: 65 36 49 84 79 56 28 43 67 36 43 78 37 40 68 72 55 62 22 82 88 50 60 56 57 46 39 57 73 65 59 48 76 74 70 51 40 75 56 45 35 62 52 63 32 80 64 53 74 34 76 60 48 55 51 54

### Finding Differences in GPAs

11.3 Semester GPAs are compared for seven randomly chosen students in each class level at Oxnard University. Does the data prove a significant difference in mean GPAs? Please see the attachment and interpret the results. If we are doing a test using a significance level of 5% and we get a p value of less than that- what d

### Salaries of Public School Teachers: Regression Table Results

The following regression results relate to a study of the salaries of public school teachers in Midwestern city. Variable coefficient standard error t-ratio Constant 20,720 6,820 3.04 EXP 805 258 3.12 R -squared = 0.684, n=105, s

### Hypothesis testing for population mean under p value approach

The analyze results of two instruments A & B, show the following data: Instrument A : Mean = 14.2, Std Dev = 1.4, N = 250 Instrument B : Mean = 13.0, Std Dev = 0.8, N = 200 Significance Level = .05 Calculate the p value.

### Conducting a hypothesis test for student math scores

The mean math score for fifth grade students at Smart Elementary is 90 with a standard deviation of 8. The fifth grade students are tested each year to determine if the mean score remains the same. A random sample of 30 students are chosen from the classes this year and provide a sample mean score of 94. The null hypothesis Ho:

### Agricultural Yield: Hypothesis Testing

Formulate the null and alternative hypotheses for a hypothesis test. Identify the population and describe how to select a random sample for a hypothesis test. State in clear terms the conclusion that should be given if the null hypothesis is rejected. An agricultural research company claims that the yield for its new breed of

### Formulating Null and Alternative Hypotheses

Formulate the null and alternative hypotheses for a hypothesis test based on the statement below. Identify the population and describe how to select a random sample for a hypothesis test. State in clear terms the conclusion that should be given if the null hypothesis is rejected. A high school principal claims that the mean m

### Calculating the P-Value Using Sample Groups

Given the following data, how do I calculate the p-value using two sample groups in my hypothesis testing. Please show the steps involved. In a sample of 210 men, 35 prefer sugar free soft drinks. In a sample of 220 women, 42 prefer sugar free soft drinks. Using a significance level of 0.05, test whether women prefer sugar fr

### Baseball - Record Store and College Admin Probabilities

Problem #4 Historically, the Giant's opening home game has been on a Sunday with an average crowd of 60,000. During the last 5 years, they have opened on Saturday with an average crowd of 58,000. Allowing a 2,5% error of type 1, formally test the hypothesis that opening on Saturday has dampened attendees. S =S/vn=1000 Su

### The probability of a successful firing is, on any test, 0.95.

1. Five cruise missiles have been built by an aerospace company. The probability of a successful firing is, on any test, 0.95. Assuming independent firings, what is the probability that the first failure occurs on the fifth firing? 2. A lot of 25 color television tubes is subjected to an acceptance testing procedure. The p

### A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small cafe during their visit.

Can you please answer the following questions. A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small cafe during their visit. Laura claims that 10% of tourists will include a visit to a cafe. Use a 0.05 significance level to test her claim. Would it be wise for her to use that claim in trying to con

### Hypothesis testing for mean..

I need to state the null and alternate hypotheses for the following: The coach of a soccer team claims that the mean height of the players on his team is less than 70 inches (which is the mean height of American males).

### A researcher is asked to determine the likelihood that a new medication for arthritis works better than a similar medication that's been around for a decade. How would the researcher approach this assignment?

A researcher is asked to determine the likelihood that a new medication for arthritis works better than a similar medication that's been around for a decade. How would the researcher approach this assignment? State a possible research hypothesis in the space below. Frame it as specifically as possible, in a testable way (so

### Step by step method for testing the hypothesis (ANOVA) for mean scrap rate under 5 step approach is discussed here.

Prepare answers to the following assignments from Chapter 11 of the Doane & Seward e-text: Use the data from Exercise 11.1 on page 449 then test the hypothesis that the treatment means are equal at the 0.05 significance level and (a) State the null hypothesis and alternate hypothesis, (b) What is the decision rule? (c) Comput

### Analyzing Car Crash Data

Please see attachment for problems I am struggling with. Thanks in advance for help provided. Multinomial Experiments #11 Randomly selected deaths from car crashes were obtained and the results are included in the table below. Use a 0.05 significance level to test the claim that car crash fatalities occur with equal fr

### Senior executives and computer hours

The manager of a software company wishes to study the number of hours senior executives spend at their computers by type of industry. The manager chooses five executives from three different industries. At the .05 level of significance, what should be concluded that the amount of time spent is different? Senior Executives

### Hypothesis Testing: Null and Alternate Hypotheses

Provide examples regarding how to set up a "Null Hypothesis" and the "Alternate Hypothesis." This is based on ideas of the meaning of the tests and how this may be used in an exercise.

### The publisher of Golf Illustrated has found through past experience that 50% of its subscribers renew their subscriptions.

Always get overwhelmed by the amount of material when covered at a comprehensive level. Attached is the study material of what to be prepared to cover at the conclusion of this course. I have worked through them but get stumped at several points. Can you provide a systematic approach to these problems and provide a reference to

### One Population / Two Population Hypothesis

How can I set up One - Population" 1. State a relevant and useful "One - Population" hypothesis both in Words and statistical language for each population (minimum of 3) 2. Perform the 5 step hypothesis testing procedure 3. Present your calculations and results 4. Make all possible observations and inte

### Hypothesis Testing - Baseball Salaries

Part 1: Prepare a paper discussing "Hypothesis Testing" using your ideas of the meaning of the tests and how this may be used in an exercise. Discuss the "Null Hypothesis" and the "Alternate Hypothesis" and describe how to set up a "Null Hypothesis" and an "Alternate Hypothesis. Part 2: Using Baseball data attached,comput

### Ethics of Accquiring Qualitative and Quantitative Data

Consider which type of data appeals to you. Is it qualitative or quantitative? Please prepare one paragraph each to discuss the advantage(s) (1) and disadvantages (2) of each type of database. Prepare one paragraph to discuss how ethics may enter in the data acquisition phase. Does a qualitative database that is based upon s

### Hypothesis Process with Real World Examples

Having problem with working through hypothesis process in real world examples. Hypothesis testing process is a series of steps to evaluate a process to see if assumptions are correct. What are the major benefits of the process and what are the weakness of the process? The null hypothesis or HO has unique characteristics su

### Null and Alternative Hypotheses for Normal Distribution Mean

Suppose that you wish to test a researcher's claim that the mean of a normally distributed population has increased from its commonly accepted value of 1.60. In order to carry out this test, you obtain a random sample size of 150 from this population. This sample yields a mean of 1.80 and a standard deviation of 1.30. What are t

### Test of hypothesis for difference between means: Prepare answers for the following Exercises and show all of your work in an Excel spreadsheet. A sample of 40 observations is selected from one population.

Exercise #1 A sample of 40 observations is selected from one population. The sample mean is 102 and the sample STDEV is 5. A second sample of 50 observations is selected from a second population. That sample mean is 99 and the STDEV is 6. Conduct the following test of hypotheses using the 0.04 significance level: H(0): m

### Statistical analysis for undergraduate GPA

1. The undergraduate GPA for students admitted to the top graduate business schools was 3.37 Assume this estimate was based on a sample of 120 students admitted to the top schools. Using past years' data, the population standard deviation can be assumed known with Q=.28 What is the 95% confidence interval estimate of the mea

### Statistics: Noise and Flight Phase

High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High" (92 decibels or more). There

### Packages of M&M's: Qualitative and Quantitative Null Hypotheses

See the attachment for data on the following questions: 1. Purchase four packages of regular M&M's. For the first three, look for and purchase three of the 5.3 oz packages that contains about 1/4 cup and has 3.5 servings in one package. For package #4, look for and purchase the package that has 1.69 oz and one serving size.