According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for Hispanic females was 84.3 years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research. The distribution of age at death, X, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean, x, in all possible samples of size n is approximately normal if n is large enough, by the central limit theorem. Let x be the mean life expectancy in a sample of 100 Hispanic females. Determine the interval centered at the population mean u such that 95% of sample means x will fall in the interval. Give your answers precise to one decimal.

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According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for Hispanic females
was
84.3
years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research.
The distribution of age at death, X, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean,
x, in all possible samples of size n is approximately normal if n is large enough, by the central limit theorem.
Let x be the mean life expectancy in a sample of 100 Hispanic females. Determine the interval centered at the population
mean u such that 95% of sample means x will fall in the interval. Give your answers precise to one decimal.
You may need to use software or a table of z-critical values.
lower limit 81.4
years
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Transcribed Image Text:According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for Hispanic females was 84.3 years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research. The distribution of age at death, X, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean, x, in all possible samples of size n is approximately normal if n is large enough, by the central limit theorem. Let x be the mean life expectancy in a sample of 100 Hispanic females. Determine the interval centered at the population mean u such that 95% of sample means x will fall in the interval. Give your answers precise to one decimal. You may need to use software or a table of z-critical values. lower limit 81.4 years terms of use contact us help about us careers privacy pollcy 5:48 PM 11П/2020 a prt sc insert
oper limit
Murphy, Sherry L, et. al. Deaths: Final Data for 2015, National Vital Statistics Reports, Volume 66, Number 6, November 27, 2017.
attps://www.cdc.gov/nchs/data/nvsr/nvsr66/nvsr66_06.pdf. Accessed 24 April 2018.
Ryan D. Edwards, The Cost of Uncertain Life Span, NBER Working Paper No. 14093 December, 2011. http://www.nber.org/papers/w14093. Accessed 24
2018.
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Transcribed Image Text:oper limit Murphy, Sherry L, et. al. Deaths: Final Data for 2015, National Vital Statistics Reports, Volume 66, Number 6, November 27, 2017. attps://www.cdc.gov/nchs/data/nvsr/nvsr66/nvsr66_06.pdf. Accessed 24 April 2018. Ryan D. Edwards, The Cost of Uncertain Life Span, NBER Working Paper No. 14093 December, 2011. http://www.nber.org/papers/w14093. Accessed 24 2018. Contact us heip privecy poicy terms of use abcutus 11 a
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