The admission fee at an amusement park is $4.00 for children and $5.60 for adults. On a certain day, 284 people entered the park
1 answer:
You might be interested in
Answer:
R =
Step-by-step explanation:
I = ( multiply both sides by 100 to clear the fraction )
100I = PRT ( isolate R by dividing both sides by PT )
= R
Answer:
The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.
Step-by-step explanation:
We have the standard deviation of the saple, so we use the t-distribution to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 50 - 1 = 49
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of . So we have T = 2
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.