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Hypothesis Testing

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

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

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.

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

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

Tests of Samples with Equal Variance

A new drug is being tested to see if it reduces the number of migraine headaches. Assuming equal variances, at alpha = .025, do these samples of number of monthly migraines from eight volunteers who are taking the drug and eight who are not show a significant reduction in the mean number of monthly migraine headaches? (See Scien

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

Does Lovastatin reduce the risk of heart attack?

Does Lovastatin reduce the risk of heart attack? In texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2081 people. After 5 years, 57 of the patients had suffered a heart attack, compared with 97 for the inactive pill. a) State the appropriate hypothesis. b) Obtain a test statistic and

Hypothesis Testing with the P-Value Approach

In testing the hypothesis, H0: u _> 28.7 and Ha: u < 28.7, using the p-value approach, a p-value of 0.0764 was obtained. If sigma = 9.8, find the sample mean which produced this p-value given that the sample of size n = 40 was randomly selected.

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 for mean..

Procyon Mfg. produces tennis balls. Weights are supposed to be normally distributed with a mean of 2.035 ounces and a standard deviation of 0.002 ounces. A sample of 25 tennis balls shows a mean weight of 2.036 ounces. At &#945; = .025 in a right-tailed test, is the mean weight heavier than it is supposed to be?

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.