This case study is about a study on coffee consumption of people that live in the United States. In total, 92 people were randomly selected and data was gathered regarding the annual consumption of coffee in gallons. Of these 92, 51 were females and 41 were males. You must show all work and formulas used in order to receive full credit. This includes showing all steps of the appropriate hypothesis test from the chapter notes. Round decimals in calculations to three places.
1. A consumer group claims that more than 62% of people choose coffee rather than other beverages as their preferred drink in the morning. In the sample of 92 people, 68 reported that they prefer coffee. At α = 0.02, is there enough evidence to support the consumer group’s claim? (12 points) Questions 2 and 3 refer to the following information regarding the annual consumption of coffee of the 41 males. Of the sample of the 41 males, the sample mean is 25.7 gallons and the sample standard deviation is 3.8 gallons. Assume the data is normally distributed and the sample is randomly selected.
2. Assuming α = 0.005, is there enough evidence to support a claim that the mean amount of consumption is at least 28 gallons? (12 points)
3. Assuming α = 0.05, is there enough evidence to support a claim that the standard deviation of the number of servings is 3 gallons? (12 points)
4. For the entire random sample of 92 people, the sample mean is 21.6 gallons. Assume the population standard deviation is 4.8 gallons and that the population is normally distributed. Is there enough evidence to support a claim that the mean amount of consumption is more than 20.2 gallons? Assume α = 0.03. (12 points)
5. Of the 92 people in the sample, the annual consumption of coffee and the weekly amount of hours worked were compared to find r = 0.623. Test the significance of this correlation coefficient using α = 0.10. Is there a significant correlation between annual coffee consumption and the weekly amount of hours worked? (12 points)
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This case study is about a study on coffee consumption of people that live in the...
Case Study Chapter 7 Elementary Statistics This case study is about a study on coffee consumption of people that live in the United States. In total, 92 people were randomly selected and data was gathered regarding the annual consumption of coffee in gallons. Of these 92, 51 were females and 41 were males. You must show all work and formulas used in order to receive full credit. This includes showing all steps of the appropriate hypothesis test from the chapter...
Questions 2 and 3 refer to the following information regarding the annual consumption of coffee of the 41 males. Of the sample of the 41 males, the sample mean is 25.7 gallons and the sample standard deviation is 3.8 gallons. Assume the data is normally distributed and the sample is randomly selected. 2. Assuming α = 0.005, is there enough evidence to support a claim that the mean amount of consumption is at least 28 gallons? (12 points) 3. Assuming...
aez bow youarved atyour salutian n tor n e the answer sheet for full credit. Write I neatly, ty and be organized. 10 department of Agriculture claims that the mean co nsumption of coffee by a person in 2 The U.S. deparis 29.28 gallons per year. A random sample of 16 people in the United States yelds a United States is le mean coffee consumption of 33.5 gallons per year and a sample standard deviation of 4.2 0.01, can you...
A tea drinker’s society estimates that the mean consumption of tea by a person in the United States is more than 8 gallons per year. In a random sample of 100 people, you find that the mean consumption of tea is 7.9 gallons per year with a standard deviation of 2.67 gallons. At the 7% level significance, can you support the society’s claim?
A sample of 450 consumers was surveyed on their typical weekly consumption coffee in units of cups. They were asked how many cups of coffee they purchased over a typical week. There were 296 men in the survey and 154 women. For men, the mean consumption was 19 cups with an SD of 21.0. The median consumption was 13. For women, the mean consumption was 16.6 cups with an SD of 19.7. The median expenditure was 13. There were 73...
11. A tea drinker's society estimates that the mean consumption of tea by a person in the United states is more than 8 gallons per year. In a random sample of 100 people, you find that the mean consumption of tea is 7.9 gallons per year with a standard deviation of 2.67 gallons. At the 7% level significance, can you support the society's claim?
A research service estimates that the mean annual consumption of fresh-market tomatoes by a person in the United States is less than 25 pounds. A random sample of 65 people in the United States has a mean annual consumption of fresh-market tomatoes of 22 pounds and a population standard deviation of 6 pounds. At α = 0.05, is there enough evidence to reject the service’s claim? a. Identify the claim and state H0 and Ha. b. Determine whether the hypothesis...
QUESTION 6 A researcher claims that the average yearly consumption of soft drinks per person is less than 60 gallons. In a sample of 85 randomly selected people, the mean of the yearly consumption was 58.8 gallons. The standard deviation of the population is 7.5 gallons. At = 0.005, test the researcher's claim. What is the test statistic for this problem? -1.60 -1.70 OOOO
You are performing a study about weekly per capita milk consumption. A previous study found weekly per capita milk consumption to be normally distributed, with a mean of 39.6 fluid ounces and a standard deviation of 5.5 fluid ounces. You randomly sample 30 people and record the weekly milk consumptions shown below. 32 42 29 31 36 40 29 49 33 40 34 35 25 30 43 35 37 41 41 40 30 26 22 36 48 36 40 36...
4. Hypothesis Testing Annual per captia consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006. Being from the fidtrest, you believe milk consumption is higher there and wish to support your opinion A sample of 16 individuals from the Midtvesterm town of Webster City showed a sample mean annual consumption of 24.1 gallons with a sample standard deviation of s 48.