If the calculated mean bmi from a sample of 970 women is 29.2 with a standard error of 0.237 , what is the 95% of CI
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A group of researchers developed a 95% z confidence interval for the mean body mass index (BMI) of women aged 20 to 29 years, based on a national random sample of 647 such women. They assumed that the population standard deviation was known to be σ = 7.5. In fact, the sample data had mean BMI x = 26.9 and standard deviation s = 7.39. What is the 95% t confidence interval for the mean BMI of all young women? (Round your answers to three decimal places.) answer: _____ to ______
Sri K.
A group of researchers developed a 95% z confidence interval for the mean body mass index (BMI) of women aged 20 to 29 years, based on a national random sample of 674 such women. They assumed that the population standard deviation was known to be σ = 7.5. In fact, the sample data had mean BMI x = 26.1 and standard deviation s = 7.32. What is the 95% t confidence interval for the mean BMI of all young women? (Round your answers to three decimal places.) ______ to ________
T. L.
20.26 Body mass index of young women. In Example 16.1 (page 377), we developed a 95% z confidence interval for the mean body mass index (BMI) of women aged 20–29 years, based on a national random sample of 654 such women. We assumed there that the population standard deviation was known to be ̃ ̃ = 7.5. In fact, the sample data had mean BMI x̄ = 26.8 and standard deviation s = 7.42. What is the 95% t confidence interval for the mean BMI of all young women?
Robin C.
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