Answer:
C) 28
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean and standard deviation
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean
and standard deviation
Over the entire six years that students attend an Ohio elementary school, they are absent, on average, 28 days due to influenza.
By the Central Limit Theorem, the expected value is 28.
So the correct answer is:
C) 28
1.
2. Jenna bought 4 lbs of apples.
Step-by-step explanation:
Step 1:
If a value x is to be rooted to a value of a, it will be equal to the value of x with an exponential .
So .
In the question, .
Substituting these values in the equation we get,
Step 2:
Apples cost $2.75 per pound. Jenna paid $11 for apples.
To calculate how many pounds of apples Jenna bought, we divide the price for which apples were bought by the cost per pound.
The price for which apples were bought = $11.
The cost per pound = $2.75.
The number of pounds bought =
So Jenna bought 4 pounds of apples.