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# Hypothesis Testing

### Statistics Materials Covering Chi-Square Goodness

Please read the questions carefully and use Excel to solve the problems. Thank you. One hundred people were asked which of four brands of Cola they preferred... (The material covers Chi-Square Goodness of Fit Tests, Contingency Tables, One-Factor Analysis of Variance, and Two-Factor Analysis.) (Please use Excel to solve

### Statistics: Solve Using Alpha Value

The web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using a=.025?

### At the 0.01 level of significance, is the true mean of fax transmissions greater than 10?

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard de

### One Sample Hypothesis Testing for Research Issue

Please hep with the following assignment: Formulate both a numerical and verbal hypothesis statement regarding your research issue. Verbal: The average (mean) cost of a three bedroom home is less than or equal to \$250,000. Null Hypothesis: Ho: u < \$250,000 Alternate Hypothesis: Ha u > \$250,000 We all know the av

### Conducting Baseline Analysis

Data was collected from a random sample of eight men and 10 women currently undergoing treatment for hypertension. Each person reported the number of cigarettes smoked each day and each was assigned a numerical value representing their risk of cardiovascular disease (CVD). The risk assessment was a number from 0 - 100 and was ba

### Hypothesis Testing: Level of Significance and Average Capacities

1. A study has been made to compare the nicotine contents of two brands of cigarettes. Ten cigarettes of Brand A have an average nicotine content of 3.1 milligrams with a standard deviation of .5 milligrams, while 8 cigarettes of Brand B have an average nicotine content on 2.7 milligrams with a standard deviation of .7 milligram

### Statistics of Students in Different Majors

15.18 Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At alpha = .01, is the degree of certainty independent of credits earned? 15.22 A student team examined parked cars in four diff

### Mean vs. Hypothesized Value

Hypothesis Test: Mean vs. Hypothesized Value 250,000.0000 hypothesized value 214.4538 mean Data 34.7157 std. dev. 6.8083 std. error 26 n 25 df -36688.37 t 1.0000 p-value (one-tailed, upper) Team: Above are the calculations for our project which I performed in Megastat and then manually as well. I am

### What is an independent sample?

A. What is an independent sample? What is a related sample? When should researchers use different hypothesis tests for independent and related samples? Is one type of sample preferable over the other? Explain your answer. b. What is a Type I error? Explain how the cumulative Type I error affects your decision making.

### One Sample Hypothesis Testing - Real Estate

Formulate both a numerical and verbal hypothesis statement regarding your research issue. - 250 words (includes introduction) Verbal: The average (mean) cost of a three bedroom home is less than or equal to \$250,000. Null Hypothesis: Ho: u < \$200,000 Alternate Hypothesis: Ha u > \$200,000 We all know the average cost

### Hypothesis Testing: Echinacea Test

In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children. "Days of fever" was one criterion used to measure effects. Among 337 children treated with echinacea, the mean number of days with fever was 0.8, with a standard deviation of 1.50

### Test of hypothesis

1) It has been claimed that the mean age of all FHSU Virtual College statistics students is at most 30 years old. Using the age data collected from this class, test this hypothesis--that is does the data set of our class statistically support this claim or is the mean age value likely higher? Justify your answer through a form

### (1) Because of the expense involved, car crash tests often use small samples. When five BMW cars are crashed under standard conditions, the repair costs (in dollars) are used to test the claim ...

Complete questions are in the attached file.

### Hypothesis Testing: Double Counting

A company has been accused of double counting such that if race and gender are related there is double counting. Caucasian African American All other Male 72 48 28 Female 24 24

### Hypothesis Testing: Executive Average Salary

The executive committee has learned that the average salary for executives in the industry is \$140,000, and the committee is concerned that they are not being paid enough. Using the random sample, test the committee's idea that the mean of executive salaries is at least equal to that of the industry standard. You may assume a=.0

### Prob-value approach / the traditional approach

Statistics-prob-value approach and then the traditional approach 1. In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61.0% called the previous year. At one point in the season, umpire Dan Morrison called strikes in 2231 of 3581 pitches (bas

### Sample Testing: American Workers Job Satisfaction

Using AIU's large database of survey responses from the AIU data set, complete the following: Perform hypothesis testing on one variable's data (choose either the intrinsic or extrinsic column). Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the app

### Sample testing- American Workers Job Satisfaction

Please help me so I can complete the following: Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the appropriate critical value, selecting the test s

### Hypothesis Testing Samples

1. In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At alpha = .01, did the yellow fire trucks have a significantly

### A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking. (1) Please state the corresponding null and alternative hypotheses to determine if most (more than 50%) workers get their jobs though networking; (2) Please find the value of the test statistic for the claim that most (more than 50%) workers get their jobs though networking.

A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking. (1) Please state the corresponding null and alternative hypotheses to determine if most (more than 50%) workers get their jobs though networking; (2) Please find the value of the test statistic for the c

### Value approach and the traditional approach

Please help with these questions. I need to be able to understand how to do them. Please write out all steps from beginning to end , formulas etc. (need answers too so I can double check myself) please do not use excel, I need to see what I am trying to learn. Please see attached. Chapter 6 questions 1. A medical s

### Hypothesis Testing: Feasibility of Outsourcing

I have to perform the five-step hypothesis test on the data attached pertaining to the feasibility of outsourcing a department such as customer service within the company, AT & T. I do not know how to perform a five-step hypothesis.

### Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead.

Please help in answering the following questions and please show me how the answers were arrived at for my continued learning experience: Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 1

### Distributor, Random Sample, and Hypothesis Testing

Your distributor is to deliver a large quantity of sweaters. You have ordered 47% to be white, 33% black, and 20% green. You select a random sample of 300 sweaters and counted 150 white, 85 black, and 65 green 1. State the null hypothesis and the alternative hypothesis 2. Compute the values for the follow

### Writing a null hypothesis from a business problem proposal.

I need help writing a Business Problem Proposal using a null hypothesis. Here are sample business problems: * Talk about the effect of no smoking laws on the tobacco industry. Will the trend in no smoking laws affect cigarette sales? You can develop a null from that. * Dunkin' Donuts is trying to infiltrate Starbucks' mark

### Sample Stocks Hypothesis & Paired T Test

Conduct a test of hypothesis that the mean price (current) of the stocks on Sample A is the same as the mean price (current) of all stocks in sample B. Show all 5 steps. (See 2 attached documents for Sample A & B). Omit any stocks without a price. Using Sample A, conduct a paired T-test to determine if there has been a signi

### A newly installed automatic gate system was being tested to see if the number of failures in 1,000 entry attempts was the same as the number of failures in 1,000 exit attempts.

Please see the attached file; Do a complete hypothesis, include the hypothesis, decision rule, calculation of test statistic, decision, interpretation and t value. A newly installed automatic gate system was being tested to see if the number of failures in 1,000 entry attempts was the same as the number of failures in 1,000 e

### Hypothesis testing for working hours

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 25 weekly time sheets and calculated an average of 41.5 hours with a standard deviation of 2.5 hours. Over lunch, you discuss this problem with you

### Maumee Ford-Mercury: Relationship Between Care Age And Selling Price

The owner of Maumee Ford-Mercury wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year. Car Age (years) Selling Price (\$000) Car Age (years) Selling Price (\$000) 1 9 8.1 7 8 7.6 2 7 6.0 8 1

### Oh baby! Gifts and Surgical Office Hypothesis Testing Questions

1. The web based company Oh baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using a=.025? (See story.news.yahoo.com accessed June 25, 2004) 2. An auditor review