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# Hypothesis Testing

### Hypothesis Testing for the American Sugar Producers Association

1) The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. 1. What is the value of the population mean? What is the best estimate of this value? 2. Explain why we need to use t

### Test hypothesis

You are the Vice President for Human Resources at XYZ Investment Management, Inc. Your employees have recently complained about their long working hours. You collected a sample of 49 weekly timesheets and calculated an average of 41.5 hours with a standard deviation of 2.5 hours. Using a significance level of 0.01, can you

### 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

### 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.

### 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 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.

### 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

### 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.

### Explanatory and Response Variables

A fast food chain sells its burgers alone or as part of a "value meal" which includes fries and a drink. They know some customers are health conscious. They want to do an experiment to see if the proportion of customers choosing the meal would increase if they offered baby carrots with the meal as an alternative to the fries. Th

### Applications of Hypothesis Testing : Develop three hypotheses that can be tested using t-tests.

Drawing on one of your interests in the study of criminal justice, develop three hypotheses that can be tested using t-tests. Why do you think it would be interesting or important to test these hypotheses? Specify the level of measurement for your independent and dependent variables.

### Hypothesis Testing and 99% Confidence Intervals

Please help answer the following questions. Provide your answers in Excel. 14. In a 2-tail hypothesis test on a population mean, what is the p-value or OSL of the hypothesis test if the calculated test statistic based on 11 observations is 3.169 and the pop. variance is unknown? 15. How large of a sample would be required

### Customers were waiting in line too long so data was collected. The mean time was 28 minutes. One month later a sample of 127 customers was selected. The mean wait time recorded was 26.9 minutes and the S.D. of the sampling was 8 minutes. Using the .02 level of significance, conduct a 5 step hypothesis testing to determine if the new processes significantly reduced the wait time.

Customers were waiting in line too long so data was collected. The mean time was 28 minutes. One month later a sample of 127 customers was selected. The mean wait time recorded was 26.9 minutes and the S.D. of the sampling was 8 minutes. Using the .02 level of significance, conduct a 5 step hypothesis testing to determine if th

### In the following exercises examine the given statement, and then express the null hypothesis H&#959; and alternative hypothesis H1 in symbolic form.

Having trouble figuring out how to work some problems from Elementary Statistics. See attachment for problems. In the following exercises examine the given statement, and then express the null hypothesis H&#959; and alternative hypothesis H1 in symbolic form. 12 The mean top of knee height of a sitting male is 20.7 inche

### A perfectly competitive firm is a price taker. That is, no matter how much the firm produces, it can always sell its product at the current price.

Dear OTA, Please help me with the attached questions. Thanks 1. A perfectly competitive firm is a price taker. That is, no matter how much the firm produces, it can always sell its product at the current price. In other words, a perfectly competitive firm has no control over price; it simply treats the price of its out

### Hypothesis Tests of Equal Variances

Test the given claim. Use a significance level of a = 0.05 and assume that all populations are normally distributed. 11. Hypothesis Test for Magnet Treatment of Pain. Researchers conducted a study to determine whether magnets are effective in treating back pain, with results given below (based on data from "bipolar Permane