Hypothesis Testing

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Coin Flips and Hypothesis Testing

A coin was flipped 60 times and came up heads 38 times. a. At the .10 level of significance, is the coin biased towards heads? Show your decision rule and calculations. b. Calculate a p-value and interpret it.

The manufacturer of Trilene braided fishing line claims that the average number of gamefish that can be landed before the line needs to be replaced on the reels is 5,000.

The manufacturer of Trilene braided fishing line claims that the average number of gamefish that can be landed before the line needs to be replaced on the reels is 5,000. The standard deviation of the number of fish landed is 600. Denny sampled 60 of his big game rods on his fleet of sport fishing boats and determined that the a

List three cases for a test comparing two means

List three cases for a test comparing two means. Explain carefully how they differ.

Type I and Type II error..

Type I and Type 11 error Please see attached. Thank you. Describe the action that would result in a type I error and a type II error if each of the following null hypotheses were tested. a. H0: There is no waste in US Defense Department spending b. H0: This fast-food menu is not low fat

Find Critical Z Value Assuming Normal Distribution

Please help me solve the following, I need the steps so that I can do them myself. Let me know how many credits will be required. 1.)Find the critical z value, assume that the normal distribution applies. alpha = 0.005; H1 is p not equal 0.20 2.)In 1990, 5.8% of job applicants who were tested for drugs failed the test. At

Critical region and critical values

Please help with the following problem. Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following: a. H0: m = 25 and Ha: m ¹ 25, a = 0.10 b. H0: m £ 32 and Ha: m > 32, a = 0.01 c. H0: m ³ 13 and

Testing the Mean Life of a Battery

Please see attached file. 1) Which of the following would be the correct hypotheses for testing the claim that the mean life of a battery for a cellular phone (while the phone is left on) is less than 24 hours? A. H0:   24 and Ha:  < 24 B. H0:  = 24 and Ha:   24 C. H0: &

Hypothesis Testing and Prospective Homebuyers

Metro Real Estate Association is preparing a pamphlet that they feel might be of interest to prospective homebuyers in the Middletown and Brockton areas of the city. One item of interest is the number of years children remain in the same district for schooling. A sample of 40 households with school-aged children in Middletown wa

Hypothesis Testing

Choose a variable (such as number of daily admissions at a local theater or number of miles students have to commute daily to get to their college.) Before collecting the data, decide what a likely average might be, then complete the following: a. Write a brief statement of purpose of the study b. Define the population c.

Hypothesis Testing: Differences Between Means

Given the sample data below calculate the following: a. Sample Mean - Set One: ______ b. Sample Mean - Set Two:_____ c. Sample Std. Dev. - Set One: _____ d. Sample Std. Dev. - Set Two: _____ e. Sample Size - Set One: _____ f. Sample Size - Set Two: _ g. Hypothesis Test at LOS 0.01 if Set One has a higher population aver

.Testing of hypothesis problems

A sample size of 35 is used to test H0: m 65 vs. Ha: < 65. Given that = 63.5 and = 2.5, answer the following questions What is the computed value of the test statistic? What distribution does the test statistic have when the null hypothesis is true? Is the alternative hypothesis one-tailed or two-tailed? What is the p-v

Hypothesis Testing for Heart Risk Reduction Drug

Background: In a study conducted, researchers gave prescription X to 2,325 people and an inactive prescription to 2,081 people (avg age 58). After 5 years, 57 of the prescription X population had suffered a heart attack, compared to 97 for the inactive drug. Need to answer the following: 1. Overall does lovastatin reduce th

Hypothesis Testing Problems Based on the P Value Method and the Traditional Method

9.54 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

Hypothesis test for the difference of population means: Paired comparisons

I am looking to understand the formula for calculating the standard deviation for the T Statistic - in the problem attached among learning th T Statistic.

The airline industry and overweight baggage

Airlines must be careful about the total weight of baggage carried by a plane on a commercial flight. Passengers with items exceeding the maximum single-item weight (usually about 70 pounds) must pay a fee (usually about $50.00 per item). Airlines continually monitor the proportion of overweight items in order to evaluate the ap

Hypothesis Test Using AIU's Large Database

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, selecting the test statistic and determining its value from the sample data, comparing the observed value to the cri

Tests of Means/Proportions

A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day, would this prove that they are exceeding their goal, using alpha = .025?

Tests of Means and Proportions

A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.

(a) At the .01 level of significance,is the true mean greater than 10? (b) Use Excel to find the right-tail p-value.

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 devi

Randomized Complete Block Designs

For each of the following problems you are to provide the following: a) The experimental design structure (CRD, RCBD). b) The null and research hypothesis, test statistic and all important (necessary) summary statistics, rejection region and conclusion. c) Based on the results of the analysis (part b), could you have made

Completely Randomized and Randomized Complete Block Designs

Numerical and Verbal Hypothesis Statement

The Production Manager at Hydro-Corn Farming, Inc. is considering hiring 15 additional laborers to harvest the corn supply during the peak season, as supply and demand are requiring. Currently, 50 laborers are harvesting a total of 1,000 ears of corn per hour. Laborers make $15.00 on overtime per hour. Laborers are having to

Usage of a Two Population Test

When would you use a two population test with a large sample size at your place of employment, in your education, or in politics?

How do you perform a one-tailed test for mean IQ scores of this year's class compare to that of previous years?

A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 14 of this year's entering students and finds that their mean IQ score is 116, with standard deviation of 12. The college records indicate that the mean IQ score for entering s

Statistical Analysis - Testing hypotheses by the five-step procedure

The breaking strengths of cables produced by a certain manufacturer have a mean of 1750 pounds, and a standard deviation of 60 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 80 newly manufactured cables are randomly chosen and tested, and

Ms. Lisa Monnin is the budget director for Nexus Media, Inc.

Please see the attached file. 1. Ms. Lisa Monnin is the budget director for Nexus Media, Inc. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. Sales ($) 131 135 146 165 136 142 Audit ($) 130 102 129 143 149 120 139 At the

Hypothesis Testing for ABC Company

ABC Company assembles electrical components. Over a period of 10 days, employee John has averaged 9 rejects with a standard deviation of 2 rejects. Employee Jane averages 8.5 rejects with a standard deviation of 1.5 rejects over the same period. At the .05 significant level, can we conclude that there is less variation in the nu

Find the Expected Values of Probability Distributions

I have some problems and one in particular needs to be done in spss. I've scanned the problems and they are attached. The first series of problems are #1, #2, #5, #8, #9, #10. The next problem is #9 and the data file is also be attached to complete this problem. Please show all work. Thanks

Parkland Medical Repackaging

1. A t-test and comparison of two samples-Youth and Family and HOMES. Interpret your p-value and explain what the analysis shows practically. 2. ANOVA - interpret your p-value and explain what the analysis shows practically. Data attached.

Estimate the 'fudge' factor for passenger's weights

DB - Testing differences between population means : Read the article, Passengers face airport weigh-in. Source: news.com.au, 2003. Passengers face airport weigh-in From correspondents in Washington January 29, 2003 Passengers checking in for flights on small planes may be asked to step on the scales along with their