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Hypothesis Testing

Test the hypothesis,Conclusion without conducting hypothesis

The following are average weekly inventory costs in thousands of dollars for two proposed inventory control policies. The values were obtained from independent replications of a simulation model of the system. Test the hypothesis that the average weekly cost for policy A is less than that of policy B at a 5% significant level.

Univariate Analysis: Effects of Gender on Worksite Location

See attached file for data. What are the effects of gender and worksite location (on- or off-site) on level of confidence? In other words: a. Is there a gender difference in confidence? b. Does type of worksite experience affect confidence? c. Is there an interaction between gender and worksite in their effect on confide

Purchasing Manager Tests Lifetimes of Light Bulbs for LCD Projectors

A purchasing manager for a large university is investigating which brand of LCD projector to purchase to equip "smart" classrooms. Of major concern is the longevity of the light bulbs used in the projectors. The purchasing manager has narrowed down the choice of projector to two brands, Infocus and Proxima, and wishes to determi

Mean Waste Generated

As part of your work for an environmental awareness group, you want to test the claim that the mean waste generated by adults in the country is more than three pounds per person per day. In a random sample of 11 adults in the country, you find that the mean waste generated per person per day is 3.3 pounds and the standard deviat

Test Random Sample of 100 Observers from a Binomial Population

Suppose a random sample of 100 observers from a binomial population gives a value of p* = .63 and you wish to test the null hypothesis that the population parameter p is equal to .70 against the alternative hypothesis that p is less than .70. a) Noting that p* = .63, what does your intuition tell you? Does the value of p* ap

PC Manufacturer: Hypothesis Test for Proportion vs. Hypothesized Value

A PC manufacturer claims that no more than 2% of their machines are defective. In a random sample of 100 machines, it is found that 5% are defective. The manufacturer claims this is a fluke of the sample. At a .01 level of significance, test the manufacture's claim, and explain your answer. MegaStat Output Hypothesis

Claim of the True Proportion of Blue M&Ms Candies

See attached file. Use the M&Ms data to complete this assignment. You will be using the methods of 7.4 for the color proportions and 7.2 for the mean number of candies per bag. For the Bonus you will be using the methods of 7.5. Be sure to state clear hypotheses, test statistic values, critical value or p-value, decision

15 Multiple Choice Statistics questions: Hypothesis, sample means, criticial value

13) The owner of a bottling company is considering buying a new bottling machine. He has been testing two different machines that are being considered. After collecting 300 samples from each machine over several weeks, he was able to conduct a two sample z test.<p>He decided to utilize a 0.05 significant level for the test. The

Hypothesis Testing for Student Variables at Harrigan University

See the attached data file. Harrigan University is a liberal arts university in the Midwest that attempts to attract the highest quality students, especially from its region of the country. It has gathered data on 178 applicants who were accepted by Harrigan. The data are in the file named Harrigan which is posted on my webs

Hypothesis Test

A soft drink filling machine, when in perfect adjustment, fills the bottles with 12 ounces of soft drink. A random sample of 25 bottles is selected, and the contents are measured. The sample yielded a mean content of 11.88 ounces, with a standard deviation of 0.24 ounces. Use a 0.05 level of significance and test to see if the

Statistics Hypothesis test fo Tammy Corporation mean weekly units of production

The manager of Tammy Corporation wants to determine whether or not the type of work schedule for her employees has any effect on their productivity. She has selected 15 production employees at random and then randomly assigned five employees to each of the three proposed work schedules. The following table shows the units of p

Statistics for Bastien Inc: Test average mpg for small automobiles manufactured

Bastien, Inc. has been manufacturing small automobiles that have averaged 50 miles per gallon of gasoline in highway driving. The company has developed a more efficient engine for its small cars and now advertises that its new small cars average more than 50 miles per gallon in highway driving. An independent testing service ro

Doctors and House Calls in Memphis and Atlanta

Among a sample of 50 M.D.s (medical doctors) in the city of Memphis, Tennessee, ten indicated they make house calls; while among a sample of 100 M.D.s in Atlanta, Georgia, 18 said they make house calls. Determine a 95% interval estimate for the difference between the proportion of doctors who make house calls in the two cities.

Statistics testing for mean acceleration

Significance Level: Hypothesis testing is the basis of inferential statistics. Statisticians are always coming up with new tests and testing new characteristics of population parameters. One of the simplest tests that currently exist is the one-sample test for means. A random sample is drawn. If the population variance is

Experimental bumper to reduce damage in low-speed collisions: Reduce downtime?

An experimental bumper was designed to reduce damage in low-speed collisions. This bumper was installed on an experimental group of vans in a large fleet, but not on a control group. At the end of a trial period, accident data showed 12 repair incidents for the experimental group and 9 repair incidents for the control group.

Compute 3 treatment solutions for SS

Treatments _____I______II______III n = 10 n = 10 n =10 M = 2 M = 3 M = 7 T = 20 T = 30 T =70 ______________________ A. How to compute SS for the set of 3 treatment means? B. Using result from A, how to compute n (SSmean)? C. Then, how to compute SS between with the computational formu

Hypothesis Samples: Example Questions

A hypothesis can be rejected at one significance level, but not rejected at another significant level for the same set of samples. The level of significance reflects how much error we can tolerate in the test conclusion. For example, when we buy a 4,000-square-feet house, do you think the measurement is really exact 4,000 square

Hypothesis testing: Accidents at intersections example

The local municipality claims that since the percentage of intersections that had an accident last year decreased from the prior year, the city is now safer. What are the hypotheses for this situation? Is the city really safer? Should be in the form of the null hypothesis (H0), and the alternative hypothesis (H1).

Find effect of a treatment using a two tailed test

Givens: A sample of n = 9 that receives the treatment, a population mean m = 40, a standard deviation s = 9, and an after treatment sample mean of M = 33. Is the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with alpha = .05, and later, if the standard deviation is changed to

Conducting a hypothesis test

A random sample of 300 beer drinkers is selected and each member of the sample is asked to choose between two brands of beers: Brand A and Brand B. The results are that 165 prefer Brand A and 135 prefer Brand B. Conduct a hypothesis test. What is the p-value, and how much evidence is there to conclude that more than 50% of

Hypothesis Testing for Manufacturer of Athletic Footwear

A manufacturer of athletic footwear claims that the mean useful lifetime of his product will exceed 50 hours. A random sample of 36 pairs of shoes leads to the following sample results, in terms of useful life: x = 52.3 hours and s = 9.6 hours. Conduct a hypothesis test. What is the p-value, and how much evidence is there to

Hypothesis Testing for Vendall which leases soft drink vending machines

Vendall leases soft drink vending machines that are designed to dispense 10 ounces of soft drink. Customers complain when machines dispense too much soft drink, causing spillage, and customers also complain when machines dispense too little soft drink. A particular machine is being tested by a random sample of 144 soft drinks.

American Flag Bank: Using z Tests about a Population Proportion

The Senior Management of a large multi-state bank, American Flag Bank, has proposed to its Board of Directors introducing a host of new fees/charges, including substantial interest rate increases on preexisting loans. Concerned about a backlash from customers, not to mention regulators and Congress, the Board has directed manag

Hypothesis testing: Kannon camera

Good news! Kannon Camera has just announced a new digital camera that it claims can take an average of more than 12 photographs per second. The company's announcement states that there is 'extremely strong evidence' the new camera can deliver what it promises. In a footnote they indicate that this conclusion is based on a

Auntie Pam's Jelly: Using z Tests about a Population Mean Sigma Known 2-tail

Auntie Pam's Home Made Wild Grape Jelly has been a great hit through online sales. She has recently expanded her small factory and acquired a new filler machine to accommodate the increased demand, especially for the 12 ounce jar, which is the most popular. Her son (and summer partner) Will has raised concerns that the new mac