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Hypothesis Testing

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, α = .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

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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

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

Significance Levels: Age

A manager of a sporting goods store claims that the average age of customers who buy a certain product is 25. A random sample of 55 customers had an average age of 25.6. At a significance level of 1%, should this claim be rejected? Assume sigma = 1.25.

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

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

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

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

Hypothesis testing for a given claim

Testing Hypothesis. Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method unless your instructor specifies otherwise.

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

Test the claim

You are given the following data. Test the claim that there is a difference in the means of the two groups. Use alpha = 0.10. Group A Group B