-3n < 81...divide both sides by -3, change the inequality sign
n > -81/3
n > - 27 <==
** in an inequality, when dividing/multiplying by a negative number, the inequality sign changes
All of them except 40 cars and 5 buses, 22 cars and 21 buses, 0 cars and 41 buses, 4 cars and 37 buses
The distance from 0 on the number line represents the absolute value of the number
The order is 0.08, 1/4, 0.3, 1/3, 40%, 85%. It looks like you had the order right in the first place!
Part A:
Given that in a sample of 400 registered voters, 204 were democrats, i.e. n = 400, <span>
</span>The 95% confidence interval for the proportion of registered democrats voters in the population is given by:
Part B:
Given that t<span>here
are 169 million registered voters in the US, the interval for
the number of registered democrats in the population is given by
[0.461(169,000,000), 0.559(169,000,000)] = (77,909,000, 94,471,000)
</span>