A series of surveys in GARISSA, carried out from 1990 to 1998, asked random samples of men and women aged 75 to estimate whether or not they would survive to the age of 85. Ten years after each survey the actual numbers surviving in each cohort were determined. All the sample sizes were large. The table summarizes the data. Men Women Year of survey Percentage estimating they would survive to age 85 Percentage actually surviving to age 85 Percentage estimating they would survive to age 85 Percentage actually surviving to age 85 1990 39.6 27.0 45.9 44.2 1992 38.9 27.8 43.1 46.6 1994 41.3 29.4 46.5 45.1 1996 39.2 30.2 46.2 45.2 1998 39.8 33.2 48.6 47.4 i). Describe what the data show about actual survival rates for men and women over time. ii). Describe what the data show about estimated survival rates for men and women over time. Compare the abilities of men and women to estimate their survival rates.

A series of surveys in GARISSA, carried out from 1990 to 1998, asked random samples of men and women aged 75 to estimate whether or not they would survive to the age of 85. Ten years after each survey the actual numbers surviving in each cohort were determined. All the sample sizes were large. The table summarizes the data. Men Women Year of survey Percentage estimating they would survive to age 85 Percentage actually surviving to age 85 Percentage estimating they would survive to age 85 Percentage actually surviving to age 85 1990 39.6 27.0 45.9 44.2 1992 38.9 27.8 43.1 46.6 1994 41.3 29.4 46.5 45.1 1996 39.2 30.2 46.2 45.2 1998 39.8 33.2 48.6 47.4 i). Describe what the data show about actual survival rates for men and women over time. ii). Describe what the data show about estimated survival rates for men and women over time. Compare the abilities of men and women to estimate their survival rates.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 3CYU

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	Men	Women
Year of survey	Percentage estimating they would survive to age 85	Percentage actually surviving to age 85	Percentage estimating they would survive to age 85	Percentage actually surviving to age 85
1990	39.6	27.0	45.9	44.2
1992	38.9	27.8	43.1	46.6
1994	41.3	29.4	46.5	45.1
1996	39.2	30.2	46.2	45.2
1998	39.8	33.2	48.6	47.4