Answer:
12.5% or 1/8
Step-by-step explanation:
To find a compound probability multiply the likelihood of both events with each other.
Probability is how many things wished to be gotten over the total amount of possibilities for the event.
Spin a 3 on the spinner: 1/4 or 25% 1 space out of 4 spaces.
Flip the head side of the coin: 1/2 or 50% 1 side wish out of 2 sides.
1/4 x 1/2 = 1/8
1 divided by 8 = 0.125
0.125 x 100 = 12.5
12.5 is the the percentage.
Answer:
y= -4x+-2
Step-by-step explanation:
hope that helped. have a great day.
Answer:
The minimum sample size necessary is 2305.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is:
For this problem, we have that:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary?
We need a sample size of n.
n is found when M = 0.02. So
Rounding up
The minimum sample size necessary is 2305.
