solve the maths asap correctly plz and answer all of these as all are connected Suppose, a researcher wants to conduct a study todetermine whether drinking alcoholic beverages has aneffect on the bacteria that cause ulcers and for thispurpose she conducted an experiment among 180 peopleand developed the following table -DevelopingNo. of Alcoholic drinksUlcerTotalconsumed per dayNoUlcerUlcerNoneA21One-Two4178More than twoE49TotalF82180a. What is the probability of consuming one-two alcoholicdrinks?Answer in exact fraction, or rounded to at least 4 decimal placesb. What is the probability of having ulcer?Answer in exact fraction, or rounded to at least 4 decimal placesc. What is the probability of developing ulcer among thepeople who don't consume alcoholic drinks?Answer in exact fraction, or rounded to at least 4 decimal placesd. What is the probability developing ulcer among thepeople who consumed more than two alcoholic drinks?Answer in exact fraction, or rounded to at least 4 decimal places

No. of alcoholics drinks Ulcer No Ulcer Total None A=32 21 B=53 one-two 41 C=37 78 more than…

Answered: Suppose, a researcher wants to conduct…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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What is an experiment?
A manufacturer has determined that a machine averages one faulty unit for every 500 it produces. What is the probability that an order of 300 units will have one or more faulty units?
To investigate water quality, in early September 2016, the Ohio Department of Health took water samples at 2424 beaches on Lake Erie in Erie County. Those samples were tested for fecal coliform, which are the E. coli bacteria found in human and animal feces. An unsafe level of fecal coliform means there is a higher chance that disease‑causing bacteria are present and more risk that a swimmer will become ill if she or he should accidentally ingest some of the water. Ohio considers it unsafe for swimming if a 100-milliliter100-milliliter sample (about 3.3 ounces)3.3 ounces) of water contains more than 400400 coliform bacteria. The E. coli levels found by the laboratories are shown in the table. 18.7 579.4 1986.3 517.2 98.7 45.7 124.6 201.4 19.9 83.6 365.4 307.6 285.1 152.9 18.7 151.5 365.4 238.2 209.8 290.9 137.6 1046.2 127.4 224.7 Take these water samples to be an SRS of the water in all swimming areas in Erie County. Are these data good evidence that on…
A cross-sectional study of 1,900 participants looked at the association between Normal Course Load (12-15 credit hours (CH)) and Anxiety among upperclassmen college students (Junior & Senior). The study included 1,000 students with a High Course Load. This study also discovered a total of 850 cases of Anxiety. Of those with a Normal course load 12% were diagnosed with anxiety like symptoms by a school psychologist. Course Load High (16-19 CH) Normal (12-15 CH) Total 850 Yes Anxiety 1050 No 1000 900 1900 Total Fill in every blank cell in the table. You will report them as "fill in the blanks" below based on the labels in the table.
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1550 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 19 recent mileages of Citrus cars was taken. The mean of these 19 mileages was 1450 miles per month, and the standard deviation was 202 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean recent monthly mileage, u, of Citrus cars is less than 1550 miles per month? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary,…
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1550 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 19 recent mileages of Citrus cars was taken. The mean of these 19 mileages was 1532 miles per month, and the standard deviation was 208 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.1 level of significance, can it be concluded that the mean recent monthly mileage, μ , of Citrus cars is less than 1550 miles per month? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as…
How can engaged couples improve their chances of a happy marriage? Olthoff (1989) tested the communication quality of couples three months before and again three months after marriage. The data is for the husbands only of one random sample of 10 couples who had received ordinary (very minimal) premarital counseling from the ministers who were going to marry them. The scores are for communication quality. Test to see if the scores changed after three months of marriage. The population of difference in communication scores is normally distributed. Test at the 5% level. Before After 126 115 133 125 126 96 115 115 108 119 109 82 124 93 98 109 95 72 120 104
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1550 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 13 recent mileages of Citrus cars was taken. The mean of these 13 mileages was 1425 miles per month, and the standard deviation was 209 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.10 level of significance, can it be concluded that the mean recent monthly mileage, μ, of Citrus cars is less than 1550 miles per month? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary,…
According to a study on reptiles from decades ago, the mean lifespan of giant Aldabra tortoises in the wild is 98.3 years. Many of the areas where these tortoises live have become polluted with plastic waste. Because of this, a biologist claims the mean lifespan of these tortoises has decreased. To test this claim, the biologist conducted a study of 21 randomly selected, giant Aldabra tortoises in the wild. In the study, the sample mean lifespan was 96.3 years with a sample standard deviation of 15.2 years. Assume that the population of lifespans of giant Aldabra tortoises in the wild is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.10 level of significance, to support the claim that μ , the mean lifespan of giant Aldabra tortoises in the wild, is now less than 98.3 years. (a) State the null hypothesis H0 and the alternative hypothesis H1 that you would use…
A statistical program is recommended. A 10-year study conducted by the American Heart Association provided data on how age, blood pressure, and smoking relate to the risk of strokes. Data from a portion of this study follow. Risk is interpreted as the probability (times 100) that a person will have a stroke over the next 10-year period. For the smoker variable, 1 indicates a smoker and 0 indicates a nonsmoker. --Using age, blood pressure, and whether a person is a smoker, develop an estimated regression equation that can be used to predict risk. Use x1 for age, x2 for blood pressure, and x3 for whether a person is a smoker. (Round your constant term to one decimal place and coefficients to three decimal places.)
Cardiac Arrest at Day and Night. A study investigated survival rates for in-hospital patients who suffered cardiac arrest. Among 58,593 patients who had cardíac arrest during the day, 11.604 survived and were discharged. Among 28,155 patients who suffered cardiac arrest at night, 4139 survived and were discharged (based on data from "Survival from In-Hospital Cardiac Arrest During Nights and Weekends" by Peberdy et al., Journal of the American Medical Association, Vol. 299. No. 7). We want to use a 0.01 significance level to test the claim that the survival rates are the same for day and night. In this example, use a confidence interval rather than a hypothesis test to help draw conclusions.
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1500 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 19 recent mileages of Citrus cars was taken. The mean of these 19 mileages was 1486 miles per month, and the standard deviation was 249 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean recent monthly mileage, u, of Citrus cars is less than 1500 miles per month? Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. : 0 Н The null…

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