A manufacturer has developed a new fishing line, which he claims has a mean breaking strength of 15 kilograms with a standard deviation of 0.5 kilogram. To test the hypothesis that μ = 15 kilograms against the alternative that μ < 15 kilograms, a random sample of 50 lines will be tested. The critical region is define
The manufacturer of the ColorSmart - 5000 television set claims that 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who have owned a ColoSmart - 500 television set for five years. Of these 400 consumers, 316 say that th
26. According to a dietary study, a high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is only 220 milligrams per day, which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of certain cereal has a mean sodi
Use the following table when answering Questions 44 - 48: Data Indicates You Should: The Actual Situation: H0 is True HA is True Believe H0 Believe HA A C B D 44. The correct missing description of the conditions defined by cell A is a. Type I error committed. b. Type II error committed. c. you correctly beli
See attached file for full problem description. 33. A grocery store owner is interested in determining if the average weight of a package of ground beef sold in the store weighs one pound. An appropriate null hypothesis for this study is a. H0:  = 1 lb b. H0:   1 lb c. H0:  > 1 lb
1. Define Regression Analysis and its real world applications. 2. Define ANOVA and its real-world applications. 3. ID/define the Greek Symbols: μ (mu) = Σ (Upper Case Sigma = σ (Lower Case Sigma) = X2 (Chi Square) = α (lower case alpha) = 4. Explain when its appropriate to use Parametric and Non-P
Question 1 Tests for butterfat milk content were performed on milk from a sample of 20 Holstein dairy cows. The sample mean was 3.88% and the standard deviation was .42 percentage points. Test at the 5% significance level whether the data provide sufficient evidence to conclude that the population from which the sample was take
The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes, the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods, and f
Using the data in problem 8.9 (attached) Test whether there is difference between the five production lines. Note: you do not actually have to do problem 8.9, just use that data. Does there appear to be a problem due to non-constant variance and draw your conclusions concerning differences among production lines.
Does the Industry Code or Policy Type significantly affect the revenue?
Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of 588 depressed individuals is selected and treated with Resithan, and 201 find relief from their depression. A random sample of 417 depressed individuals is independently selected from the first sample and treated with Exemor, and 1
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment. A recent survey contained the question "How important to your life is having a fulfilling job?" Of the 245 college graduates surveyed,
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment. A recent survey contained the question "How important to your life is having a fulfilling job?" Of the 264 college graduates surveyed
Chapter 10 in your text, exercise 10.24?High vs. Low Pressure Sales Tactics (Two Way ANOVA). Use Table 10.24 and Figure 10.13. Complete the exercise from the data given and answer all of the questions in a written summary. (Cut and paste any EXCEL data that you wish to discuss). See attached file for full problem descriptio
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief, , is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine, . A health insurance company conducted an independent study
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine. A health insurance company conducted an independent study and c
A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered. Does this provide compelling evidence for concluding that more than 10% of all plates blister under such circumstances using a significance l
A random sample of 145 recent donations at a certain blood bank reveals that 74 were type A blood. Does this suggest that the actual percentage of type A donors differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a significance level of 0.01. Let p re
Test whether or not the addition of 3 variables to a model will be statistically significant. Partial Model Observations = sample of 25 Y hat = 62.42 - 1.836X1 + 25.62X2 SSE = 725 Full Model The equation with additional 3 variables. Y hat = 59.23 - 1.762X1 + 25.638X2 + 16.237X3 + 15.297X4 - 18.723X5 SSE = 520
In fitting a least squares line to n=15 data points, the following quantities were computed: SSxx=55, SSyy=198, SSxy=-88, x-bar=1.3, and y-bar=35. Determined the following: y=B0+B1X y=37.08-1.6X SSE=57.2 S squared = 4.4 1. Find 90% confidence interval for B1/Interpret answer 2. Find 90% prediction interval for Y when
Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, 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 $40,000. A corresponding sam
The management of Discount Furniture, a chain of discount furniture stores in the Northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 salespeople were selected at random, and their weekly incomes before and after the plan were recorded. Salesperson Before
Ms. Lisa Monnin is the budget director for Nexus Media, Inc. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. Sales ($) 131 135 146 165 136 142 Audit ($) 130 102 129 143 149 120 139 At the .10 significa
The null and alternate hypotheses are: H0: u1 equal 2 H1: u1 not equal to 2 A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard dev
We captured data from 100 men in North and South Carolina concerning their weights. Is there a statistically significant difference in the weights of men from North Carolina to South Carolina? We want to be 95% confident in our results. The data is shown below... North Carolina South Carolina 166.16
#3 - Use your own paper as an answer sheet. Show all mathematical calculations. No partial credit will be given if work is not shown. A calculator will be required to complete the exam. 1. Find the 90% confidence interval for a population mean if the sample mean is 21.6 with a standard deviation of 2.8 for a sample of 35.
A. Clearly define the dependent and independent variables that are the focus of the team's study. The dependent variable is the variable whose value is the result or is a function of the control or independent variables. b. State the null and alternative hypotheses and the theories that support these hypotheses that will be t
Hugger Polls contends that an agent conducts a mean of 53 in-depth home surveys every week. A streamlined survey form has been introduced, and Hugger wants to evaluate its effectiveness. The number of in-depth surveys conducted during a week by a random sample agent are: 53 57 50 55 58 54 60 52 59 62 60 60 51 59 56 At the
3. The director of admissions at the University of China is concerned about the high cost of textbooks for the students each semester. A sample of 20 students enrolled in the university indicates that X (bar) = $316.4 and s = $43.20. Answer the following questions in detail by using Excel.
A decade-old study found that the proportion, p, of high school seniors who believed that "getting rich" was an important personal goal was 75%. A researcher decides to test whether or not that percentage still stands. He finds that, among the 250 high school seniors in his random sample, 182 believe that "getting rich" is an im