An investigation of the effectiveness of an antibacterial soap in reducing operating room contamination resulted in the table above. The new soap was tested in a sample of eight operating rooms in the London metropolitan area during the last year and the results are given in the table above.lf we test whether the contamination measurements are lower after using the soap we find the test statistic and critical values are respectively:
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- You are interested in enhancing the performance of runners in a 10-kilometer event. You randomly select 40 runners and randomly assign them to one of two diet groups. During the 24 hours prior to the 10K run you feed the experimental group a special diet of 80% of their calories from carbohydrates and ad lib water intake. During the 24 hours prior to the event you tell the control group to eat what they normally would eat and drink prior to a 10-K race. Prior to running the event you measure the glycogen content of the quadriceps muscle in mg/kilogram of wet muscle of each subject. You also measure the individual’s time to run the 10K event. Thus, the purpose of your study is to determine the effect of a high carbohydrate diet on glycogen content of the muscle and 10k performance. A secondary purpose is to examine the relationships between glycogen content of the quadriceps and 10K performance. Restate the purpose(s) and formulate Research Hypotheses to address the purposeYou are interested in enhancing the performance of runners in a 10-kilometer event. You randomly select 40 runners and randomly assign them to one of two diet groups. During the 24 hours prior to the 10K run you feed the experimental group a special diet of 80% of their calories from carbohydrates and ad lib water intake. During the 24 hours prior to the event you tell the control group to eat what they normally would eat and drink prior to a 10-K race. Prior to running the event you measure the glycogen content of the quadriceps muscle in mg/kilogram of wet muscle of each subject. You also measure the individual’s time to run the 10K event. Thus, the purpose of your study is to determine the effect of a high carbohydrate diet on glycogen content of the muscle and 10k performance. A secondary purpose is to examine the relationships between glycogen content of the quadriceps and 10K performance. Calculate the appropriate statistic to determine if Ho is rejected or accepted and…You are interested in enhancing the performance of runners in a 10-kilometer event. You randomly select 40 runners and randomly assign them to one of two diet groups. During the 24 hours prior to the 10K run you feed the experimental group a special diet of 80% of their calories from carbohydrates and ad lib water intake. During the 24 hours prior to the event you tell the control group to eat what they normally would eat and drink prior to a 10-K race. Prior to running the event you measure the glycogen content of the quadriceps muscle in mg/kilogram of wet muscle of each subject. You also measure the individual’s time to run the 10K event. Thus, the purpose of your study is to determine the effect of a high carbohydrate diet on glycogen content of the muscle and 10k performance. A secondary purpose is to examine the relationships between glycogen content of the quadriceps and 10K performance. For each statistical hypothesis set indicate the type of question (Descriptive,…
- Life-saving drug: Penicillin is produced by the Penicillin fungus, which is grown in a broth whose sugar content must be carefully controlled. Several samples of broth were taken on three successive days, and the amount of dissolved sugars, in milligrams per milliliter, was measured on each sample. The results were as follows. Day 1: 5.2 5.0 5.4 5.2 5.3 5.0 4.9 5.0 5.2 5.0 4.6 5.3 Day 2: 5.6 4.8 4.9 5.3 5.2 4.9 5.4 5.0 5.4 4.9 5.5 5.4 Day 3: 5.9 4.9 5.3 5.4 5.2 5.5 5.0 5.8 5.5 5.4 5.4 5.1 Construct an ANOVA table. Round your answers to four decimal places as needed. One-way ANOVA: Sugar Concentration Source DF SS MS F P Days Error TotalA farmer has decided to use a new additive to grow his crops. He divided his farm into 10 plots and kept records of the corn yield (in bushels) before and after using the additive. The results are shown below. Plot 1 2 3 4 5 6 7 8 9 10 Before 9 9 8 7 6 8 5 9 10 11 After 10 9 9 8 7 10 6 10 10 12 You wish to test the following hypothesis at the 5 percent level of significance. H0:Population mean d=0 against h1:population mean d <0 What is your decision about H0Winter visitors are extremely important to the economy of Southwest Florida. Hoteloccupancy is an often-reported measure of visitor volume and visitor activity (naplesdaily news, March 22, 2012). Hotel occupancy data for February in two consecutiveyears are as follows.OccupancyCurrent Year Previous YearOccupied Rooms 1470 1458Total Rooms 1750 1800a. Formulate the hypothesis test that can be used to determine if there has been anincrease in the proportion of rooms occupied over the one-year period.b. What is the estimated proportion of hotel rooms occupied each year?c. Using a .05 level of significance, what is your hypothesis test conclusion? What is thep-value?d. What is the 95% confidence interval estimate of the change in occupancy for the oneyear period? Do you think area officials would be pleased with the results?
- 1. An automobile manufacturing company wanted to investigate how the price of one of it's car models depreciates with age. The research department at the company took a sample of 8 cars of this model and collected the following information on the ages (x, in years) and prices (y, in hundreds of pesos) of these cars as shown: Age, x83792546 Price, y18955524140403899 Find the estimated price of a 15 year old car2h. How long it takes paint to dry can have an impact on the production capacity of a business. An auto body & paint business invested in a paint-drying robot to speed up its process. An interesting question is, "Do all paint-drying robots have the same drying time?" To test this, suppose we sample five drying times for each of different brands of paint-drying robots. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. Suppose the following data were obtained. Robot 1 Robot 2 Robot 3 Robot 4 127 145 134 149 137 133 144 141 135 143 137 136 125 146 137 141 141 128 128 153 Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value =The federal government recently granted funds for a special program designed to reduce crime in high-crime areas. A study of the results of the program in eight high-crime areas of Miami, Florida, yielded the following results. Number of Crimes by Area A B C D E F G H Before 14 7 4 5 17 12 8 9 After 2 7 3 6 8 13 3 5 Has there been a decrease in the number of crimes since the inauguration of the program? Use the 0.01 significance level. Estimate the p-value. Compute the value of the test statistic. (Round your answer to 2 decimal places.)
- The federal government recently granted funds for a special program designed to reduce crime in high-crime areas. A study of the results of the program in eight high-crime areas of Miami, Florida, yielded the following results. Number of Crimes by Area A B C D E F G H Before 14 7 4 5 17 12 8 9 After 2 7 3 6 8 13 3 5 Has there been a decrease in the number of crimes since the inauguration of the program? Use the 0.01 significance level. Estimate the p-value. 1.Compute the value of the test statistic. (Round your answer to 2 decimal places.) 2.What is your decision regarding H0? 23 multiple choice 1 Reject H0 Do not reject H0 34. The p-value is multiple choice: between 0.01 and 0.05 between 0.05 and 0.1 between 0.005 and 0.01 between 0.025 and 0.05I II III n = 5 n = 5 n = 5 M = 1 M = 5 M = 6 N = 15 T = 5 T = 25 T = 30 G = 60 s² = 9.00 s² = 10.00 s² = 11.00 ∑X² = 430 SS = 36 SS = 40 SS = 44 Use an ANOVA with α = .05 to determine whether there are any significant differences among the three treatment means. Source SS df MS F Fcriticalcritical Between treatments Within treatments Total F Distribution Numerator Degrees of Freedom = 6 Denominator Degrees of Freedom = 16 0.01.02.03.04.05.06.07.08.09.010.011.012.0F Conclusion: Reject the null hypothesis; there are no significant differences among the three treatments. Fail to reject the null hypothesis; there are no significant differences among the three treatments. Reject the null hypothesis; there are significant differences among the three treatments. Fail to reject the null hypothesis; there are significant…I II III n = 5 n = 5 n = 5 M = 1 M = 5 M = 6 N = 15 T = 5 T = 25 T = 30 G = 60 s² = 9.00 s² = 10.00 s² = 11.00 ∑X² = 430 SS = 36 SS = 40 SS = 44 Use an ANOVA with α = .05 to determine whether there are any significant differences among the three treatment means. Source SS df MS F Fcriticalcritical Between treatments Within treatments Total F Distribution Numerator Degrees of Freedom = 6 Denominator Degrees of Freedom = 16 0.01.02.03.04.05.06.07.08.09.010.011.012.0F Conclusion: Reject the null hypothesis; there are no significant differences among the three treatments. Fail to reject the null hypothesis; there are no significant differences among the three treatments. Reject the null hypothesis; there are significant differences among the three treatments. Fail to reject the null hypothesis; there are significant…