milk production. Bauman et al. (Journal of Dairy Science, 1989) reported that 12 cows given bST produced an average of 28.0 kg/d of milk. Assume that the standart deviation of milk production is 2.25 kg/d. (a) Find a 99% confidence interval for the true mean milk production. Round your answers to two decimal places (e.g. 98.76). [26.33 SHST29.67 (b) If the farms want the confidence interval to be no wider than +1.20 kg/d, what level of confidence would they need to use? Express your answer in percent. Round your answer to the nearest integer (e.g. 98). confidence =T64.2

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Chapter1: Combinatorial Analysis
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Dairy cows at large commercial farms often receive injections of bST (Bovine Somatotropin), a hormone used to spur
milk production. Bauman et al. (Journal of Dairy Science, 1989) reported that 12 cows given bST produced an average
of 28.0 kg/d of milk. Assume that the standart deviation of milk production is 2.25 kg/d.
(a) Find a 99% confidence interval for the true mean milk production.
Round your answers to two decimal places (e.g. 98.76).
26.33
Su<T29.67
(b) If the farms want the confidence interval to be no wider than +1.20 kg/d, what level of confidence would they need
to use?
Express your answer in percent.
Round your answer to the nearest integer (e.g. 98).
confidence =T64.2
Question Attempts: 1 of 2 used
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Transcribed Image Text:Dairy cows at large commercial farms often receive injections of bST (Bovine Somatotropin), a hormone used to spur milk production. Bauman et al. (Journal of Dairy Science, 1989) reported that 12 cows given bST produced an average of 28.0 kg/d of milk. Assume that the standart deviation of milk production is 2.25 kg/d. (a) Find a 99% confidence interval for the true mean milk production. Round your answers to two decimal places (e.g. 98.76). 26.33 Su<T29.67 (b) If the farms want the confidence interval to be no wider than +1.20 kg/d, what level of confidence would they need to use? Express your answer in percent. Round your answer to the nearest integer (e.g. 98). confidence =T64.2 Question Attempts: 1 of 2 used SAVE FOR LATER SUBMIT ANSWER
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