A CBS News/New York Times poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
A study of 35 golfers showed that their averages score on a particular course was 92. The standard deviation of the sample is 5. a. Find the best point estimate of the mean. b. Find the 95% confidence interval of the mean score for all golfers. c. Find the 95% confidence interval of the mean score if a sample of 60 golfers
The averages production of peanuts in the state of VA is 3000 pounds per acre. A new plant food has been developed and is tested on 60 individual plots of land. The mean yield with the new plant food is 3120 pounds of peanuts per acre with a standard deviation of 578 pounds. At a=.05, can one conclude that the average production
It has been reported that the average credit card debt for college seniors is $3262. The student senate at a large university feels that their seniors have a debt much less than this, so it conducts a study of 50 randomly selected seniors and finds that the average debt is $2995 with a sample standard deviation of $1100. With a=
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a price q
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = .05, does vehicle type vary by mall location? (Data are from a project by MBA students Steve Bennett, Alicia Morais, Steve Olson, and Greg Corda.) Vehicle Type Som
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High" (92 decibels or more). There
The Rutter Nursery Company packages pine bark in 50-pond bags. From a long history, the packaging department reports that the distribution is normal. At the end of each day Jeff Rutter, the production manager, weighs 10 bags. Below are the weights of the 10 bags from today's production. 45.6 47.7 46.3 47.6 46.2 47.4 55.
Emergency room arrivals in a large hospital showed the statistics below for 2 months. At σ = .05, has the variance changed? Show all steps clearly, including an illustration of the decision rule. Please use Excel when providing answer.
The following is sample information on the amount of tip (in dollars) received by three different food servers at the Rib Crib restaurant in Norman. At the .05 significance level, are the treatment means different? a. State the null and the alternate hypotheses. b. What is the decision rule? c. Complete an ANOVA table.
Problem 3: In the population of employee of problem 1, a question was raised on whether male and female above 50 make the same wage. To test this contention, a sample of 25 male and 25 female taken randomly was drawn and the wages found were as follow. Test the Hypothesis that the wages are equal for male and female? Mal
The following sample information shows the number computer sales transactions completed by two sales reps for a sample of four days last month. At the .05 significance level, can we conclude that there are more sales transactions completed by Jim? State the null and the alternate hypotheses, the decision rule, the value of the t
Please help with the following problem. Provide calculations and explanations. The mean interview time for a standard questionnaire of 31.3 minutes was considered to be excessive so the schedule was revised, yielding a mean interview time for a sample of 40 subjects of 21.3 minutes, with a standard deviation of 1.5 minutes.
1. Callaway Golf Company's new forged titanium ERC driver has been described as "illegal" because it promises driving distances that exceed the USGA's standard. Golf Digest compared actual driving distances with the ERC driver and a USGA approved driver with a population mean driving distance of 280 yards. Based on nine test
9.63 In the Big Ten (the NCAA sports league) a sample showed that only 267 out of 584 freshmen football players graduated within 6 years. (a) At α = .05 does this sample contradict the claim that at least half graduate within 6 years? State your hypotheses and decision rule. (b) Calculate the p-value and interpret it. (c) D
1. The National Safety Council reported that 52% of American turnpike drivers are men. A sample of 300 cars traveling southbound on the New Jersey Turnpike yesterday revealed that 170 were driven by men. With an α = 0.01 can it be concluded that a larger proportion of men were driving on the New Jersey Turnpike than the
27. The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean ... 28. A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted ... 29. The Mac Burger restaurant chain cla
OHIP records show the average length of stay in Ontario hospitals is 5.4 days. A researcher sampled 125 patient records at US hospitals and found that the mean stay was 4.6 days, with a standard deviation of 1.1 days. Does the data support the idea that Ontario health insurance practices lengthen the stay in Canadian hospitals
12. The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. 1. What is the value of the population mean? What is the best estimate of this value? 2. Explain why we need to use
"Use the M&M population data that you gathered to complete the assignment details as discussed . It is now for deciding on one Qualitative and on quantitative variable from among the many for a test".
9.1 Sketch a diagram of the decision rule for each pair of hypotheses. a. H0: mu >= 80 versus H1: mu < 80 b. H0: mu = 80 versus H1: mu _= 80 c. H0: mu <= 80 versus H1: mu > 80 9.10 In a recent survey, 10 percent of the participants rated Pepsi as being "concerned with my health." PepsiCo's response included a new "Smart Sp
One-year sales volume of four similar 20-oz. beverages on a college campus is shown. At α = .05, does this sample contradict the assumption that sales are the same for each beverage?
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are Product A Product B Product C Office 1 18 8 24 Office 2 15 22 13 Office 3 21 16
A study was performed at a university to analyze whether the preference for hamburgers or fried chicken is related to the gender of the student. This table lists the results of the study. At a =.05, test the claim that the meal preference and the gender of the student are not related. Hamburgers Fried Chicken Female 12
Prepare answers to the following assignments from the e-text, Applied Statistics in Business and Economics, by Doane and Seward: 8.48 A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was measured (a
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers
A 95% confidence limit is basically plus and minus two standard deviations from the mean in both directions the attached illustration (which you have seen before) shows confidence limits of 68%, 95% and 99.7%. M&M data for the regular 1.69 size bags of M&M's, the historical average works out to be 56.5 M&M's per bag - with a
Prepare a three-paragraph discussion of the relationship between p-value, test statistic, level of significance, and critical value. Allot one paragraph for each term. Discuss p-values for two sided and one-sided tests. Provide an example for tests using Z, Student-t, and Chi-squared. Provide equations for each when possible
Does large firm size, pure and simple, give rise to monopoly profits? This question has been a source of great interest in both business and government and the basis for lively debate over the years...See attachment for more information. Questions: A. From the variables given: Build a model to test, i.e., choose the depende
10.2 The following information is available. H0: µ ≤ 10 H1: µ > 10 The sample mean is 12 for a sample of 36. The population standard deviation is 3. Use the .02 significance level. 10.10 H0: = .40 H1: ≠ .40 A sample of 120 observations revealed that p = .30. At the .05 significance level, can the nul