Aleading medical journal claims that 71% of roller-coaster riders experience extreme anxiety just before the ride begins. a popular theme park wants to conduct a survey to verify this with the patrons in the park and wants to do so with a margin of error (me) of ±8%. what minimum sample size, rounded to the nearest whole person, does the theme park need to use?
n ≥ 75
n ≥ 150
n ≥ 118
n ≥ 129

A leading medical journal claims that 71% of roller-coaster riders experience extreme anxiety just before the ride begins. A popular theme park wants to conduct a survey with a margin of error of ±8%. The minimum sample size, rounded to the nearest whole person is:

 N ≥ 129

I hope it helps, Regards.

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional