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Hypothesis Testing

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

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

Kannon Camera Hypothesis Testing: Set up MegaStat to perform test and interpret

Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given: x = 10.5 (This is a x with - above it) Ï? = .52 n = 16 ? = .10 In part 1 of 5, you found that the kind of problem is

Hypothesis Testing for Kannon Camera's claims about newly developed camera

Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given: x = 10.5 (This is a x with - above it) Ï? = .52 n = 16 ? = .10 From part 1 of 5 you found that the kind of proble

Hypothesis Testing: Population Type, Relation, Value

Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. A sample of 16 cameras was used; they were tested and found to have a mean number of photographs per second of 10.50. Previous tests of cameras of this type revealed that

Hypothesis Testing

Assume you are a camera buff. You and your camera club have recently learned that Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. This is very impressive, but you have learned (from painful experience) to be skeptical of technology claims. You decide to ev

Hypothesis Testing of Mean: Baseball 2008 Data

59. Refer to the baseball 2008 data, which reports information on the 30 major league teams for the 2008 baseball season. Go to: Datasets. Unzip the file and look for the Baseball file. a. Conduct a test of hypothesis to determine whether the

Hypothesis Testing: P Value, weight of evidence

1. Since 9/11/2001, there has been increased concern for passenger safety. This has led to calls for new and more intrusive passenger screening equipment. While concerns for passengers' privacy are an important part of the debate, there are also concerns for the length of time required to move passengers through the proposed new

Statistics P Value for testing: Weight of evidence, null hypothesis

1. The senior management of the electric power utility company, let there be light (LTBL), has recently built, at considerable expense, a state of the art nuclear power plant in Gary, Indiana. The utility has applied for a start-up permit from the Environmental Protection Agency (EPA), which has expressed concern over the potent

Hypothesis Testing Problems: Mean & Proportion

9.23 A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labelled as 8 ounces, the company wants the packages to contain a mean of 8.17 ounces so that virtually none of the packages contain less than 8 ounces. A sample of 50 packages is selected period

Hypothesis Testing Problem Set

[1.5%] ONE SAMPLE HYPOTHESIS TEST FOR MEAN: A bowler who has averaged 196 pins in the past year is asked to experiment with a ball made of a new kind of material. If he rolls 25 games with the new ball, averaging 204 pins with a standard deviation of 24.9, can one conclude at a level of significance of .01 that the new ball ha

Statistical versus practical significance: example

Statistical vs. practical signficance Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.' a. Use a concrete example to illustrate your point(s). b. Explain the di

Statistics: Test whether 30% of telephone customers want high speed internet

A telephone company estimates that 30% of its customers are interested in high-speed Internet Service. To test this estimate, a random sample of 100 customers were selected and the results showed that 25 were interested in high-speed Internet Service. Can it be concluded that the percentage of customers interested in high-speed

Statistics: Hypothesis that playing classical music during tests increses scores

A psychologist believes that if classical music is played during a test, test scores will increase. In the past, the mean test score was 60. A random sample of 49 individuals wrote the test while classical music was in the background. The sample results showed a mean test score of 62 and a standard deviation of 6.3. Using a 5% l

Statistics: Study for number of hours spent doing household chores

A study conducted last year indicated that adults spent an average of 14 hours on household chores during the weekend. A research group wishes to determine if the average hours spent o household chores during the weekend this year is different from the 14 hours of last year. Consequently, the research group selects a random samp

Disprove the pollsters results of hypothesis tests

Pollsters just report the results of hypothesis tests that show statistical significance but not those in which there was insufficient evidence. Therefore, I would like the pollster to provide both the good and bad results. This is because, as students of Statistics, we should remember that if there is insufficient evidence to r

The video Game Satisfaction Rating Case

The Video Game Satisfaction Rating Case Please help with the following problem. Recall that "very satisfied" customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ- Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the

Statistics 5 problems: State the hypothesis, test, interpret the decision

For each problem below, answer the following 1. State the Ho 2. State the H1 3. Find the critical value 4. Determine the test statistic. Explain 5. State the decision rule 6. Show the decision rule graphically 7. Determine the computed value of the test statistic 8. Determine the p-value 9. What is your decis

Business Analysis

A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super grades of gasoline. They drive the same car under approximately similar driving conditions and changing out the type of gasoline used. At the .05 significance level, is there a difference in gas mileage for the different types of gas?

Final exam

Please see attached document. 1) The statement that determines if the null hypothesis is rejected or not is called the A. critical value B. alternate hypothesis C. test statistic D. decision rule 2) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01

Statistics: Chapter 10, 11 and 12 questions

Chapter 10 1. Rutter Nursery Company packages its pine bark mulch in 50-pounds bags. From a long history, the production department reports that the distribution of the bag weights follows the normal distribution and the standard deviation of this process is 3 pounds per bag. At the end of each day, Jeff Rutter, the production

Statistics: Hypothesis testing, Correlation

See attached file. Hypothesis Testing Examine the given statement, then express the null hypothesis H0 and alternative hypothesis H1 in symbolic form. Be sure to use the correct symbol (μ , p ,σ) for the indicated parameter. 1. The majority of college students own a vehicle. 2. Th

Evaluating the method of cooking potato chips affects taste

See attached files. SPSS Exercise Questions If you know how to operate SPSS, the assignment is fairly simple. The instructions are long, because I have included the scenarios as well. All datasets will be automatically entered into the SPSS by access the link below. I just need the measures ran and a synopsis to show cl

Sportswear Manufacturer: Relationship between Advertising, Coupon Value and Sales

Please see attached file for data. Question: A sportswear manufacturer wishes to investigate the relationship between the level of advertising, coupon value and sales. The manufacturer advertises several times a month and includes a manufacturer coupon (in dollars) with each advertisement. The value of the coupon remains the