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
Use the cumba file attached and show work in Excel. .Using the Cumba database file, create a pivot table of management level versus gender. Then, copy the data from the table into a chi square table to see if a relationship exists between employee genders and their management level. What can you conclude at the .05 significa
59. Refer to the baseball 2008 data, which reports information on the 30 major league teams for the 2008 baseball season. http://highered.mcgraw-hill.com/sites/0073401781/student_view0/index.html Go to: Datasets. Unzip the file and look for the Baseball file. a. Conduct a test of hypothesis to determine whether the
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
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
Over a period of years, toothpaste has received a mean rating of 5.9, on a 7-point scale, for overall customer satisfaction with the product. Because of a minor unadvertised change in the product, there is concern that the satisfaction may have changed. Suppose the satisfaction rating from a sample of 60 customers have a mean of
PROBLEM 1: NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price nationwide is $1.50 per gallon for self-serve regular unleaded. A random sample of 35 stations in the Milwaukee, WI, area revealed that the mean price was $1.52 per gallon and that the standard deviation was $0.05 per gall
When pollsters report results of a poll, they often include the margin of error but not much more. If candidate X has 54 percent support of the voters with a margin of error of 3 percent, that means the candidate is predicted to have between 51 percent and 57 percent support in the election. Before jumping to conclusions
Need help formulating both numerical and verbal hypothesis statements on the subject of how social anxiety disorder affect the routine life of a person.
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
See attached file. The golf professional at a private course claims that members who have taken lessons from him lowered their handicaps by more than 5 strokes. The club manager decides to test the claim by randomly sampling 25 members who have had lessons and asks each to report their reduction in handicap. These data are st
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population? With a failure to reject the null hypothesis, can we make a general statement about the populati
See attached files. In New York State, savings banks are permitted to sell a form of life insurance called savings bank life insurance (SBLI) . The approval process consist of underwriting, which includes a review of the application, a medical information bureau check, possible request for additional medical information and m
[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
See attached data set. Using AIU's survey responses from the AIU data set, complete the following requirements in the form of a report: 1. Perform a two-tailed hypothesis test on both the intrinsic and the extrinsic variable's data, using a .05 significance level. 2. Begin by creating a null and an alternate statement.
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
It has been hypothesized that the distribution of seasonal colds in Canada is as follows: Season Percentage (%) Fall 35 Winter 25 Spring 30 Summer 10 A random sample of 200 Canadian citizens provided the following results: Season Observed Fr
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
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
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
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
1. The average U.S. family includes 3.13 persons. To determine whether families in her city tend to be smaller in size compared to those across the United States, a city council member selects a simple random sample of 25 families. She finds the average number of persons in a family to be 2.78, with a standard deviation of 0.89.
Why is it important that a sample be random and representative when conducting hypothesis testing?
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
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
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?
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
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
1. What is the difference between a binomial distribution and a normal distribution? Provide an example that illustrates the difference. 2. What are the five steps of hypothesis testing... list each? 3. Provide one example of probability sampling. 4. Provide one example of non-probability sampling.
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