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9. [40.3 Points] BBUNDERSTAT127.1.018.MI. What price do farmers get for their watermelon crops? In the third week of July, a random sample of 41 farming regions gave a sample mean ofx = $6.88 per 100 pounds of watermelon. Assume that 0' is known to be $1.92 per 100 pounds. (a) Find a 90% condence interval for the population mean price (per 100 pounds) that farmers in this region get for their watermelon crop. What is the margin of error? (Round your answers to two decimal places.) lower limit 0 upper limit 0 margin of error 0 (b) Find the sample size necessary for a 90% condence level with maximal error of estimate E = 0.39 for the mean price per 100 pounds of watermelon. (Round up to the nearest whole number.) farming regions (c) A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error? Hint: 1 ton is 2000 pounds. (Round your answers to two decimal places.) lower limit t upper limit t margin of error 3 8. [-/0.3 Points] DETAILS BBUNDERSTAT12 7.1.017.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 46 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight) Assume that O = 7.60 ml/kg for the distribution of blood plasma. (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) the distribution of weights is normal is known the distribution of weights is uniform n is large is unknown () Interpret your results in the context of this problem. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.99. We are 99% confident that the true average blood plasma volume in male firefighters falls within this interval. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.01. We are 1% confident that the true average blood plasma volume in male firefighters falls within this interval. (@ Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.80 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) male firefighters 7. [-/0.3 Points] DETAILS BBUNDERSTAT12 7.1.017.FB. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 50 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that O = 7.90 ml/kg for the distribution of blood plasma. (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) the distribution of weights is uniform is unknown n is large is known the distribution of weights is normal ( Interpret your results in the context of this problem. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.01. We are 99% confident that the true average blood plasma volume in male firefighters falls within this interval. We are 1% confident that the true average blood plasma volume in male firefighters falls within this interval. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.99. (@) Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.70 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) male firefighters() Which equation is used to find the sample size n for estimating / when O is known? n= ZE n= ZE 2 2 n = E n = E Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.70 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) male firefighters6. [-/0.3 Points] DETAILS BBUNDERSTAT12 7.1.017.EP. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 46 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that O = 7.90 ml/kg for the distribution of blood plasma. When finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) the distribution of weights is uniform is unknown the distribution of weights is normal n is large . is known ( Interpret your results in the context of this problem. We are 99% confident that the true average blood plasma volume in male firefighters falls within this interval. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.01. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.99. We are 1% confident that the true average blood plasma volume in male firefighters falls within this interval. (@) Which equation is used to find the sample size n for estimating / when O is known? On= ZoE On = (zo E )25. [-/0.3 Points] DETAILS BBUNDERSTAT12 7.1.017. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 47 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that O = 7.30 ml/kg for the distribution of blood plasma. (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) is unknown the distribution of weights is uniform is known the distribution of weights is normal On is large (c) Interpret your results in the context of this problem. We are 99% confident that the true average blood plasma volume in male firefighters falls within this interval. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.99. We are 1% confident that the true average blood plasma volume in male firefighters falls within this interval. The probability that this interval contains the true average blood plasma volume in male firefighters is 0.01. (d) Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.00 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) male firefighters4. [40.3 Points] DETAILS BBUNDERSTAT12 7.1.016. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia, or lymphomat Over a period of months, an adult male patient has taken seven blood tests for uric acid. The mean concentration was )7 = 5.35 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with (I = 1.95 mg/dl. (a) Find a 95% condence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error? (Round your answers to two decimal places.) lower limit | upper limit | margin of error | (b) What conditions are necessary for your calculations? (Select all that apply.) [ a is unknown uniform distribution of uric acid normal distribution of uric acid it is large l__' l_. l__' V. a is known (0) Interpret your results in the context of this problem. The probability that this interval contains the true average uric acid level for this patient is 0.05. We are 95% condent that the true uric acid level for this patient falls within this interval. The probability that this interval contains the true average uric acid level for this patient is 0.95. We are 5% condent that the true uric acid level for this patient fa lie within this interval. (d) Find the sample size necessary for a 95% condence level with maximal margin of error E = 1.00 forthe mean concentration of uric acid in this patient's blood. (Round your answer up to the nearest whole number.) : blood tests 3. [-10.3 Points] DETAILS BBUNDERSTAT12 7.1.015.FB. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Allen's hummingbird (Selasphorus sasr'n) has been studied by zoologist Bill Alther.+ Suppose a small group of 16 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is E = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with O' = 0.30 gram. (a) (b) (cl (d) Find an 80% condence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit | upper limit l margin of error I What conditions are necessary for your calculations? (Select all that apply.) L nislarge L uniform distribution o1 weights L Uisunknown L Uis known L normal distribution of weights Interpret your results in the context of this problem. We are 80% confident that the true average weight of Allen's hummingbirds falls within this interval. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.80. We are 20% confident that the true average weight of Allen's hummingbirds falls within this interval. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.20. Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.1 4 for the mean weights of the hummingbirds. (Round up to the nearest whole number.) | hummingbirds Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.+ Suppose a small group of 12 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with O = 0.36 gram. When finding an 80% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) Zo= (a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) On is large uniform distribution of weights is known normal distribution of weights . is unknown () Interpret your results in the context of this problem. We are 20% confident that the true average weight of Allen's hummingbirds falls within this interval. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.80. We are 80% confident that the true average weight of Allen's hummingbirds falls within this interval. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.20. () Which equation is used to find the sample size n for estimating / when O is known? On= On= (ZoE )2 On= ZOG On= Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.06 for the mean weights of the hummingbirds. (Round up to the nearest whole number.)1. [-40.3 Points] BBUNDERSTAT127.1.015. Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.1' Suppose a small group of 11 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is F = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with 0 = 0.36 gram. (a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit l upper Iim it | margin of error | (b) What conditions are necessary for your calculations? (Select all that apply.) F normal distribution of weights T. uniform distribution of weights 0' is known 0' is unknown l_.' V. l_i n is large (c) Interpret your results in the context of this problem. We are 80% confident that the true average weight of Allen's hummingbirds falls within this interval. We are 20% condent that the true average weight of Allen's hummingbirds falls within this interval. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.20. The probability that this interval contains the true average weight of Allen's hummingbirds is 0.30. (d) Find the sample size necessary for an 80% condence level with a maximal margin of error E = 0.1 5 for the mean weights of the hummingbirds. (Round up to the nearest whole number.) I I hummingbirds Need Help