in a poll taken in december of 2012, gallup asked 1006 u.s adults wheter they were baseball fans. 40% said they were. in february of 2008, 35% of a similar-size sample had reported beingbaseball fans. find the margin of error for the 2012 poll if we want 90% confidence in our estimate of the percent of U.S adults whoare baseball fans. (not the interval, just the distance from p used to find the interval) (leave it as a decimal) if we wanted to be 99% confident would the margin of error be larger or smaller? find the margin of error for a 99% confidence interval for the 2012 poll (leave it as a decimal)
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
in a poll taken in december of 2012, gallup asked 1006 u.s adults wheter they were baseball fans. 40% said they were. in february of 2008, 35% of a similar-size sample had reported beingbaseball fans.
find the margin of error for the 2012 poll if we want 90% confidence in our estimate of the percent of U.S adults whoare baseball fans.
(not the interval, just the distance from p used to find the interval) (leave it as a decimal)
if we wanted to be 99% confident would the margin of error be larger or smaller?
find the margin of error for a 99% confidence interval for the 2012 poll (leave it as a decimal)
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