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Hypothesis Testing

Hypothesis Test

1. We ask if the attitudes toward fuel cost of 100 owners are hybrid electric cars (X=76) are different from those on a national survey of owners of non-hybrid cars (µ=65, s=24). Higher scores indicate a more positive attitude. A) Is this a one or two tailed test? B) In words what is the H0 and Ha? C) Perform the z-test.

Standard Test Motor Coordination

1. In a population of typical college students, µ=75 on a statistics final exam (σx=6.4). For 25 students who studied statistics using a new technique, X=72.1. Using two tails of the sampling distribution and the .05 criterion: A.) what is the critical value? B.) Is this sample in the region of rejection? How do you know? C.)

Hypothesis Testing of Mean Private School

We ask whether a private school leads to higher or lower performance on a test of social skills. A sample of 100 students from a private school produces a mean of 71.30 on the test, and the national mean for students from public schools is 75.62 (? x= 28.0). a) Should we use a one-tailed or a two-tailed test? Why? b) What are

Pearson r for given data

The admissions officer of TopNotch University wants to know the relationship between the high school GPAs and college GPAs for the 15 merit scholars in this yearâ??s freshman class. Here are the data: Student High School GPA College GPA 1 3.6

Independent and Dependent Variables Problems

A large furniture store stations salespeople near its entrance to greet customers and offer assistance in shopping. The salespeople, who work on a commission basis, tell the customers their name and hand them a business card. A psychologist thinks that the salespersons' intrusiveness might cause customers to buy less furniture r


Using AIUââ?¬â?¢s survey responses from the AIU data set, complete the following requirements in the form of a report: TEST #1 Perform the following two-tailed hypothesis test, using a .05 significance level: ââ?¬¢ Intrinsic by Gender ââ?¬¢ State the null and an alternate statement for the test ââ?¬¢ Use

Statistics: Hypothsis Testing Problems

See attachment. Please provide assistance in understanding how to work statistics problems. I need step by step details of how work was done in words of interpretation and in EXCEL so that I can understand these types of problems in future problems. When using Excel please indicated formulas used, thank you. I have

Culture and Consumption Motivation Part II

Do cultural dimensions correlate with purchase decisions? In this report, you will set out to address this question. Using the SPSS spreadsheet you submitted last week, you will create an empirical journal article, much like the one you critiqued as your Unit 3 Individual Project. THE REPORT: 1.Provide a general research

Average Peak Heights for the Mean Times

1. A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. Suppose that a storm is in progress with a severe storm class rating. Let us say that we want to set up a statistical test to see if the wave action (i.e., height) is dying down or getting worse. If you wanted to test the hypothesis t

Hypothesis testing for job satisfaction: Gender and Position type

Use the attached files. TEST #1 Perform the following two-tailed hypothesis test, using a .05 significance level: Intrinsic by Gender State the null and an alternate statement for the test Use Microsoft Excel (Data Analysis Tools) to process your data and run the appropriate test. Copy and paste the results of the o

Statistic Hypothesis Test Question

1. Perform a regression hypothesis test on the data, using the research question below. Research Question: For many home buyers and banks the correlation between homes selling price and square footage may or may not play a major factor in the overall potential of the home, but we can nonetheless examine the relationship

Research Process

Please help me with the following research paper, I am so lost......... Using the attached information, I need help describing a research issue or problem. Include a definition of your selection using quantifiable measures. Include the following steps of the business research process that must follow for addressing

Statistics Questions

1- How do dependent and independent samples differ? Give two examples of dependent samples as they may occur in a business or industry that is familiar to you. Some people use the term paired samples instead of dependent samples. 2 - What is the importance of using STOH in solving problems related to business and operation

Hypothesis Testing: Null and Alternative Hypotheses

What is hypothesis testing in the field of statistics, and why is it an important tool? What would be an example of the null and alternative hypotheses in the research data below? - Sample size: 1,100 - Likely potential target market: 4 million - Satisfaction scores ranged from 1(very dissatisfied) to 5 (very satisfied) -

Practice Questions with Statistics

5. A political polling company wants to know if there are differences among people of different political parties with respect to their views on a bill recently proposed in Congress. The company conducted a survey of 300 people and got the following results. Do the results support the hypothesis that there are differences amon

Hypothesis Testing and Normal Probability

Please show all work. A researcher is studying the wait time of patients entering the emergency room for a particular hospital in Miami. The researcher obtains the weight time (in minutes) for a sample of 15 individuals. The wait times for the 15 individuals are given in the table below: 125 91 128 81 134 135 123 86 82 12

Statistics: Asperger's syndrome; Olympic marksmen

A researcher is studying nonverbal intelligence in elementary school students identified as having Asperger's syndrome (an autism spectrum disorder often characterized by higher verbal communication skills than individual's with autism). Specifically, the researcher wants to study whether students identified as having Asperger'

Hypothesis Test: Average Teacher Salaries

A researcher reports that the average salary of teachers is more than $50,000, A sample of 25 teachers has a mean annual salary of $51,000. At alpha=.05, test the hypothesis that teachers earn more than $50,000 a yr. The standard deviation of the sample of 25 teachers is $2,000. (be sure to show your graphic, hypothesis setup, i

Examining Null and Alternate Hypothesis

1. Set-up the hypothesis test for each study described below. (Just setup the null and the alternative hypothesis, and make sure the hypothesis is testable) a. The cure for patients using an old drug against disease X was 50%. A new drug purports to improve the cure rate for Disease X. Set up the hypothesis test b. A rese

Research Proposal

This is a brief research proposal designed to test a discipline-specific theory of your choice using measures with established validity evidence. The project will be completed in three assignments. Project 2, Part 1 focuses on the background and introduction of your proposal. Select a discipline-specific theory from the list

Part One of WLS in SPSS 19

Attached is data from 2004 to 2010. The work for 2010 is complete, but since I did not do all the work myself in SPSS I do not know the steps. Please outline the steps I need to click in SPSS 19 to complete the data for the other years just as it was for the year 2010 (what do I click in SPSS 19 to run this data?) Please check t

Develop the null hypothesis and the alternative hypothesis.

See attached file. State the statistical assumptions for this test. Using the data set you have selected, choose two continuous variables for which you would like to test a relationship. Develop the null hypothesis and the alternative hypothesis. Use SPSS to calculate a correlation coefficient and a simple linear regre

Hypothesis Test

Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006). Being from the Midwest, you believe milk consumption is higher there and wish to support your opinion. A sample of 16 individuals from the Midwestern town of Webster City showed a sample mean annual consumption of 24.1 gallon

Hypothesis Testing: Difference Between Two Means

Please help with the following problem. For the paired data: Perform a hypothesis test for the difference of two means. Remember to show all steps and to explain, give an interpretation of the results. This is the hypothesis I am using; The claim that cars with mpg>29 have a lower mean weight than cars with mpg<=2

Discussion Question: Use of hypotheses and hypothesis testing

See attached article. Review the following articles given under your week 1 Articles - Electronic Reserve Readings link, and write a short synopsis (200 -300 words) of the main points and learning takeaways. In your response, refer to your Seward text readings for week 1, to support your analysis. THE PURPOSE OF HYPOTHESES

Statistics test procedures, test statistic, p value, hypothesis testing

See attached files. 9. The state department of education is interested the length of time it takes students to graduate. As part of the study the department manager wants to determine whether the proportion of all female students graduating in 5 years or less ( out of all females who graduate) is significantly different from

Test hypothesis, decision rule, value of test statistic

The mean income per person in the United States is $41,500, and the distribution of incomes follows a normal distribution. A random sample of 10 residents of Wilmington, Delaware, had a mean of $47,500 with a standard deviation of $10,600. At the .01 level of significance, is that enough evidence to conclude that residents of Wi