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Hypothesis Testing

Hypothesis Testing: Agreement of Assessments

Do a complete hypothesis test on the attached problem, including hypothesis, decision rule, calculations of the statistic, decision, interpretation, and p- value. Assume Equal Variances at (alpha) = .025 (using excel) A certain company will purchase the house of any employee who is transferred out of state and will handl

10 Multiple choice questions on Hypothesis testing, distributions.

Please see the attached file for full problem description. 1. If standard deviation (sigma) is unknown when completing a hypothesis test about the population mean, then the best estimate for the unknown standard deviation is s. _____ T/F 2. The chi-square distribution is used for inferences about the population mea

Hypothesis testing for mean.

I am looking at this problem that suggests that people will follow a 24 hour cycle of sleeping and waking even if they are not exposed to the usual pattern of sunlight. Their cycles at the end of the study were 25, 27, 25, 23, 24, 25, 26, and 25. If we use the 5% level of significance what would we conclude about the theor

Test of Hypothesis

Ho:u1-u2 = 0 Ha:u1-u2 does not equal 0 The following results are for two independent samples taken from the two populations. Sample 1 N1 = 80 x1 = 104 o1 = 8.4 Sample 2 N2 = 70 x2 = 106 o2 = 7.6 1. What is the value of the test statistic? 2. What is the p-value 3. With a=.05, what is your co

Hypothesis Testing: P-Values, Point Estimates, and Error

1. Consider the following hypothesis test: Ho:u1-u2 = 0 Ha:u1-u2 does not equal 0 The following results are for two independent samples taken from the two populations. Sample 1 N1 = 80 x1 = 104 o1 = 8.4 Sample 2 N2 = 70 x2 = 106 o2 = 7.6 1. What is the value of the test statistic? 2. What is the p-valu

Hypothesis testing problems - MacBurger chain & White Industries

Dear OTA, Please help me with the attached problems with steps. Thanks 1) The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality-assurance department found in a sample of 50 customers at the

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, 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

3questions reserved for you

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