### Test the claim

You are given the following data. Test the claim that there is a difference in the means of the two groups. Use alpha = 0.10. Group A Group B

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You are given the following data. Test the claim that there is a difference in the means of the two groups. Use alpha = 0.10. Group A Group B

The number of sit-ups that a person can do in one minute, both before and after a physical fitness course was recorded. The data is shown below for 10 randomly selected participants. Is there sufficient evidence to conclude that a significant amount of improvement took place? Assume variable is normally distributed. Test using a

Questions: Work each question, using Excel where appropriate. Remember, each gestation period is its own normal distribution. Thus, you will need to change the "mean" and "standard deviation" to reflect the question you are answering. 2. What percent of the babies born with each gestation period have a low birth w

Six groups of randomly selected students matched for IQ and age were formed. Each student was taught a concept of time by using one of three methods: Lecture, demonstration, or teaching machine. The scores are shown in the table below indicated the student's performance when they were tested on how well the grasped the concept.

Exe_1Wk1.xls The School Committee members of a midsized New England city agreed that a strict discipline code has caused an increase in the number of student suspensions. The number of suspensions for September 1992 - February 1993 for a sample of the schools is provided below. {Data} The average num

Suppose that you want to compare the mean size of health care claims submitted by five groups of policyholders. Ten claims are randomly selected from amongst the existing claims for each of the five groups. The data is shown in the following table: Group 1 ($) Group 2 ($) Group 3 ($) Group 4 ($) Group 5 ($) 763 1,3

I have been asked to suppose that faculty at my college are assigned overload courses hence additional compensation beyond the required contract hours based on seniority. There is a concern that new faculty may not be able to enjoy the same financial compensation as their senior faculty counterparts. How would you, from a quanti

Stonefield Homes is developing 2 parcels near Minneapolis, MN. In order to test different advertising approached, they use different media to reach potential buyers. The mean annual family income for 75 people making inquiries at the first development is $150,000, with a standard deviation of $40,000. A corresponding sample of 1

Help with Stating Null and Alternative hypothesis and the theories that support these hypotheses: Lemarks Studios is looking for advertiser dollars to help with production costs on its newest blockbuster movie. Lemarks Studios has several companies that want product placement in the film. The films producers wonder how many t

The table below shows the scores of a group of 15 students in mathematics and art: Student Math Art 1 22 53 2 37 68 3 36 42 4 38 49 5 42 51 6 58 65 7 58 51 8 60 71 9 62 62 10 65 65 11 66 66 12 56 56 13 66

TRUE OR FALSE? (WITH JUSTIFICATION) 1. Supporting the null hypothesis would be possible only if we could prove it for 100% of all possible cases. 2. If the claim says that µ >200 and the sample mean is 215, we can say that the claim is true because it is obvious even without a formal test. 3. A Calculated Value of

1. Variability in a dataset may be caused by various sources. Provide an example sample dataset where one or more than one sources causing its variability. Explain briefly with one or two lines explanations of those sources. Also, calculate the sample variance for the example data set that you have provided. 2. Organize the

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. Explain carefully how they differ.

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

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

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.

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

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.

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

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

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

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

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

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

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

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

You want to know if there is a difference in price between imported and domestic beers. You go to your local supermarket and record the sales price and country of origin of 68 different beers. A t-test is run, the results of which appear below. Values Attached! 1.Why would it be better to use a one-tailed test in this

Two boats the prada (Italy) and the oracle (USA) are competing for a spot in the upcoming Americans cup race. They race over a part of the course several times. Below are the sample times in minutes at the .05 significance level. Can we conclude that there is a difference in their mean times? Prada (Italy) 12.9, 12.5, 11.0,

Please see attached file for full problem description. A researcher wants an answer to the following question: Does the correlation of .34 between extracurricular activities and academic achievement represent a true relationship. The null hypothesis is there is no relationship between extracurricular activities and academic a