Answer: The conclusion is that all samples of the same size between 18% to 20% indicate that people living in a certain region use sunscreen regularly when going outdoors.
Explanation: Given percentage from the recent survey, the possible range is calculated as below:
All possible range : (19% ± 1% ) = (18%, 20%)
165 trees
Hope this helps you out!
Answer:
a. True
Step-by-step explanation:
We have been given a statement. We are asked to determine whether the given statement is true or false.
Statement: A normal distribution is symmetric; therefore the probability of being below the mean is 0.50 and the probability of being above the mean is 0.50.
We know that normal distribution is continuous probability distribution.
We know that the total area under a normal distribution curve is equal to 1. We also know that mean represents center of the normal distribution curve.
The half area will be below center and half area will be above center.
Since 0.50 is half of 1, therefore, the probability of being below the mean is 0.50 and the probability of being above the mean is 0.50 and given statement is true.
