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Hypothesis Testing

Statistics: test whether relaxation training affect number of chronic headaches?

A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training, and for the week following training the number of headaches is aga

Elementary Statistics for Null and Alternative Hypothesis

Elementary Statistics 1. A researcher knows that the population mean among college students taking the social test is a "neutral" 100. (scores higher than 100are assumed to represent more conformity than average and those lower than 100 indicates less conformity). A random sample of 30 students was selected, and the followin

Statistics: Multiple Regression for a Data Set

See file attached. Using the Major League Baseball Data Set available through the "Data Sets" link on your page, answer the research question of whether the number of wins of a team can be explained linearly by The Size of Stadium, ERA, and Stolen Bases. What I need to do is describe and perform multiple regression

Develop Null and Alternative Hypotheses .

The data on the next sheet are from a month of order corrections at Company A. The company is concerned because there are so many order corrections and they seem to be loosing money every time that they correct an order. The process improvement team collected the following data on the Detail sheet ... (Excel document attached

Hypothesis Testing Questions: T-Test and ANOVA

1. What does it mean practically when we say that we found a significant difference between two groups using a t-test? 2. Describe a business situation where you would want to use a t-test. Why would you choose that test? What would you expect to show by doing this? 3. Describe a business situation where you would wan

Statistics: Hypothesis Testing, Normal Disributions, and Z Scores

Problem 1 - According to the Coffee Research Organization, the typical American coffee drinker consumes an average of 3.1 cups per day. A sample of 12 senior citizens ... Problem 2 - An investigation of the effectiveness of an antibacterial soap in reducing operating room contamination resulted in the accompanying table. The n

Hypothesis Testing: Mean Chicken Weight

In Graph Form: Raising chickens in commercial chicken farms is a growing industry, as there is a shift from red meat to more white meat. New Jersey Red Chickens are a favorite chicken and the Feed is Us company has a new chicken food that they claim is excellent for increasing weight and naturally it costs more. You have h

SPSS Problem

Please complete each one of the following three questions. 1. Andy's Ice Cream Shop is located in a very warm part of Texas. You collect data about the number of gallons of ice cream sold and the temperature outside (in Celsius): Day Ice Cream Sales (gallons) Ave Temp (C) 1 100 10 2 132 16 3 140 20 4 213 24 5 180

Statistics: Weigh in on the dispute between MSF and AAP with tests and conclusion

The following information is for Questions 1 through 6.     The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms).  My brother takes it upon himself to make sure that everyone get the message.  It is generally believed that growing teens are getting less than the RDA

Statistics: Testing Claims

Please see the attached file. Use the M&Ms® data to complete this assignment. You will be using the methods of 7.4 for the color proportions and 7.2 for the mean total number of candies per bag. For the Bonus you will be using the methods of 7.5. You may submit your answers in Excel, Word or pdf format. Be sure to state

Statistics: Hypothesis testing for an oxygenated motor fuel

Two different formulation of an oxygenated motor fuel are being used to study their road octane numbers. The variance of road octane number for formulation 1 is 1.5 and for formulation 2 is 1.2. The random sample size for formulation 1 is 15 and for formulation 2 is 20 are rested, both from normally distributed populations. The

Statistics problem

Hello. I am doing my regular homework assignment and I cannot figure out and understand how to solve some of the problems. The book that I have does not explain or show how to solve the specific problems below. I have answered the questions that I am able to, but I cannot answer the other ones no matter how hard I have tried. Ca

Testing Equality of the Means of Two Populations

Find a dataset: approximately 30-100 scores or observations. Write a null and alternative hypothesis, conduct a statistical significance test (in SPSS or Excel), and tell what decision you'd make about the null hypothesis, and why. You'll need to include your SPSS or Excel output.

Evidence needed to reject the Null Hypothesis

To extend the analogy even further--the evidence needed to reject the presumption of innocence is guilt beyond a reasonable doubt. The evidence needed to reject the null hypothesis is an inferential statistical result that is very unlikely to have occurred by chance alone (i.e., less than 5 times out of 100, or p<.05).

Population defective rate for cell phone factory

Given the following situation, how would you use Megastat to test whether the population defective rate is greater than 5%? Please outline the process for the test and, if necessary, including the output from Megastat to explain your approach. What assumption do you need to check to make sure that the analysis is valid. "A ra

Two or More Sample Hypothesis Testing Paper

Develop one business research question from which we will formulate a research hypothesis that will test two or more populations. Note: Kindly recommend the research question based on the database. We need to do the following: o Formulate both a numerical and verbal hypothesis statement regarding your research issue

Significance Level

The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a pric

Compare the mean waiting time for patients at the two locations

Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet. The Quality Assurance Department wishes to compare the mean waiting time for patients at the two locations.

Hypothesis Testing: Mean Weight of Dole Pineapple

Scenario: Dole Pineapple, Inc., is concerned that the 16-ounce can of sliced pineapple is being overfilled. Assume the standard deviation of the process is .03 ounces. The quality control department took a random sample of 50 cans and found that the arithmetic mean weight was 16.05 ounces. At the 5 percent level of significance,