6) In a poll, 1000 randomly selected adults are surveyed and 400 of them support a certain social program. a) Find a 90% confidence interval estimate of the percentage of adults who support the...

6) In a poll, 1000 randomly selected adults are surveyed and 400 of them support a certain social program. a) Find a 90% confidence interval estimate of the percentage of adults who support the program. b) Interpret the result, and explain its meaning