The more costly and time consuming it is to export and import, the more difficult it is for local companies to be competitive and to reach international markets. As part of an initial investigation exploring foreign market entry, 10 countries were selected from each of four global regions. The cost associated with importing a standardized cargo of goods by sea transport in these countries (in US
a. At the 0.05 level of significance, is there evidence of a difference in the
b. Compare the results in (a) to those in problem 11.8 (a) on page 412.
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- In a cohort study of pesticide exposure and cancer, a group of employees who were exposed to the pesticide and a comparative group who were not exposed were followed up for 30 years at a chemical company. Researchers found that the incidence of cancer among the exposed workers was 55.3 per 1,000. In the comparative group, the incidence of cancer was 15.7 per 1,000. Calculate the: 1. relative risk and the 2. attributable risks of exposure of exposure to pesticides and the development of cancer. Please show you calculations. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). B I U S Paragraph Arial ≡≡ EE X² X₂ CH H+ {} Ⓒ K + V 10pt >¶¶< +₁ ABC ✔ ✓ E A 11 "" Ω V Tx XQ 田く 52 A&A EXEarrow_forwardJoan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours), 2.7 2.2 2.4 3.3 1.6 1.5 2.4 2.5 1.7 2.8 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. Ho : 4- Select your answer- V2 H, :- Select your answer - V b. Compute the sample mean. (to 2 decimals) c. Compute the sample standard deviation. (to 4 decimals) d. Find the test statistic and p-value. (Use Table 2 in Appendix B.) (to 3 decimals) p-value -Select your answer e. What is your conclusion? We-Select your answer- Vreject the null hypothesis. There-…arrow_forwardA data analyst working for the NZ Transport Agency wanted to evaluate whether a new road marking system is effective in lowering the number of crashes on New Zealand roads. They identified which roads were scheduled to receive the new marking system this year and measured the total number of crashes in the month before and in the month after the new system was implemented. These totals were compared to crash data gathered at the same time from similar locations that were scheduled to receive the new marking system next year. What type of experimental design is this? O a. Interrupted time-series with a true control group O b. Pretest-posttest with a non-equivalent control group O c. Interrupted time-series with a non-equivalent control group O d. Pretest-posttest with a true control grouparrow_forward
- GreenLawns provides a lawn fertilizing and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $2,500 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. S = -2R² 10M² - 8RM + 18R+ 34M where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,000 is spent on radio advertising and $500 is spent on…arrow_forwardRecent research indicates that the effectiveness of anti-depressant medication is directly related to the severity of the depression (Khan, Brodhead. Kolts, and Brown, 2005). Based on pre-treatment dcprcssion scores, paticnts werc divlded into four groups based on their level of depi ession. After receiving the antidepression medication, depi ession scores were measured again and the amount of improvement was recorded for cach pcrsion. The following data are similar to the results of the study. Moderately High Moderate Moderate Low Severe Severe 4 5 N= 16 2 3 6 6 G= 48 +a 2 2. 2 6 ΣΧ- 2 4 M=2.5 M=2 M=4 M-5 T= 10 T= 8 T= 16 T=20 SS=. .. SS=2 SS=8 SS- 6 A, Complete the places marking by ... and answer the question whether the data indicate significant difference among the four levels of severity? Test with a= 0.05. B, Compute n', the percentage of variance expressed by group difference.arrow_forwardJoan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost estimating purposes, managers use one and half hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). 2.3 0.9 2.1 1.4 3.2 2.4 2.1 1.8 3.3 1.4 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from one and half hours. a. State the null and alternative hypotheses. H0 : =u 1.5 Ha : not=u 1.5 b. Compute the sample mean. (to 1 decimal) c. Compute the sample standard deviation. (to 3 decimals) d. What is the p-value? t-value (to 3 decimals) p-value e. What is your conclusion? We reject the null. There enough evidence to prove that the mean tree-planting time differs from hoursarrow_forward
- According to the Pew research center 65% of US adults believe that the government should play a larger role in addressing climate change. A random sample (SRS) of 80 US adults found that 56 US adults believe that the government should play a larger role in addressing climate change. Does this indicate that population proportion of US adults who believe that the government should play a larger role in addressing climate change is MORE THAN 65%? Given: a= 0.05 level 1. List your oH and aH: (symbols and words) 2. State and Check the conditions for the test: 3. Use the information in question: Identify the hypotheses being tested: Find your SE and test statistic by hand: 4. Use the information in question: State your conclusion given 05.0 level, in a complete sentence, in the context of the problem. 5. Use the information in question. Find the 95% confidence interval by hand using: Given z*=1.96arrow_forwardGreenLawns provides a lawn fertilizing and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $4,000 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns has obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media: S = -2R2 − 12M2 − 9RM + 20R + 39M, Where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales if $3,000 is spent on radio advertising and $1,000 is…arrow_forwardb. The histogram gives results of this variable when the survey was administered to a class of 47 university students. Report the (i) minimum response, (ii) maximum response, (iii) number of students who did not read the newspaper at all, and (iv) mode. (i) What is the minimum response? (Type a whole number.)arrow_forward
- A veterinarian wishes to compare the number of times race horses are reported to be lame during a 12‑month period, as compared with similar horses that are not raced. The veterinarian is particularly interested in whether the exercise schedule used in racing contributes to lameness, rather than the total amount of exercise. The veterinarian feels horses to be compared should be similar with regard to age, breed, and the number of weekly hours spent exercising. Which of the given study types should be used? Group of answer choices a. A matched design in which a race horse is chosen, and a horse that is the same age, the same breed, and exercised the same number of hours is chosen for comparison. b. A horse is chosen and raced for one year, but is not raced the next year. c. A group of race horses is chosen and then, from a nearby barn, a group of horses that do not race is chosen. d. None of the answer options are correct.arrow_forwardTwenty samples, each consisting of 100 admission applications at a university, resulted in a total of 80 applications that had some type of error. a. Compute the control limits for a p-chart. b. What would be the impact on the final results if each sample contained 200 loan applications rather than 100 and all other data remained the same? c. Please show in detail these impacts quantitatively in your answers.arrow_forwardFour used cars were selected from a used car lot. A spreadsheet of database shows the following information about these cars. Brand/Color/Milage/size Ford-red-20000-large Toyota-blue-50000-small Chevrolet-black-85000-midsize Honda-grey-125000-small A) List the categories in variable "size" B) List the quantitative variable (s) Show workarrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt