A study of 1,666 US older adults found that 40.4% rate their mental health as very good. What is the population proportion of US older adults that rate their mental health as very good?
Construct a 95% confidence interval around the point estimate. Remember to: (1) choose an alpha, 2) find the z score & 3) calculate the confidence interval.
What is the lower limit of the confidence interval, rounded to 2 decimals?
How would you interpret the confidence interval you just calculated?
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