34 Americans from the CDC’s National Health and Nutrition Examination survey to estimate the mean BMI of American adults; here you’ll compute a confidence interval. In the sample, average BMI was 28.8 kg/m2 and the sample standard deviation was 6.7 kg/m2. (a) Write the formula for a 1 − α confidence interval for the mean. Identify any relevant assumptions required to use this formula. (b) Calculate a 95% confidence interval. (c) Calculate a 99% confidence interval. 4
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8 \) kg/m\(^2\) - Sample standard deviation, \( s = 6.7 \) kg/m\(^2\) - Confidence levels: 95% and 99% --- (a) Write the formula for a \(1 - \alpha\) confidence interval for the mean and assumptions Show more…
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The body-mass index (BMI) divides a person's weight in kilograms (kg) by their height in meters squared (m²). Adults 20 years and older are considered overweight if their BMI is greater than 25 kg/ m². A random sample of 81 patients over 20 years old at a local hospital resulted in a mean BMI of 27 kg/ m² with a sample standard deviation of 3 kg/ m². What is the confidence interval for the population mean using a confidence level of 99%? 26.12 kg/ m² to 27.88 kg/ m² 26.22 kg/ m² to 27.78 kg/ m² 26.35 kg/ m² to 27.65 kg/ m² 26.14 kg/ m² to 27.86 kg/ m²
Madhur L.
really struggling please help with answers asap
Supreeta N.
BMI (body mass index) is obtained as weight (in kg) divided by the square of height (in m2). Adults with BMI over 25 are considered overweight. A trainer at health club measured the BMI of people who registered for his program this week. Here are the observations: 29.4, 24.2, 25.6, 23.6, 23.0, 22.4. Assume that the population is normal with variance 6.4 a. Construct a 95% confidence interval for the mean BMI. b. What would be the required sample size to estimate the mean BMI to be within 0.1 kg/m2 with 95% confidence
Qudsiya A.
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