Whoever gets this right gets brainlyess answer and it's worth 10 points
1 answer:
You might be interested in
Company B offers the lowest price.
Company A:
32.50/2.5 =
13
Company B:
35.50/2.75 =
12.90
Company A:
32.50/2.5 =
13
Company B:
35.50/2.75 =
12.90
Answer:
And using a calculator, excel or the normal standard table we have that:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the weigths of a population, and for this case we know the distribution for X is given by:
Where and
Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
We can find the probability required with the following z score formula:
And replacing we got:
And using a calculator, excel or the normal standard table we have that: