After a recent survey of 1485 people aged 18 to 24 showing that 78% were impressed with the special effects on a newly released
1 answer:
You might be interested in
The ordered pair would be plotted in Quadrant I
Answer:
Step-by-step explanation:
The confidence interval for the population mean x can be calculated as:
Where x' is the sample mean, s is the population standard deviation, n is the sample size and is the z-score that let a proportion of
on the right tail.
is calculated as: 100%-99%=1%
So,
Finally, replacing the values of x' by 308, s by 17, n by 15 and by 2.576, we get that the confidence interval is: