Answer:
no
Step-by-step explanation:
Write an expression using multiplication and addition with a sum of 16:
2 x 6 +4
Answer:
Where and
We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error would be:
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".
Solution to the problem
Let X the random variable that represent the compressive strength of concrete of a population, and for this case we know the distribution for X is given by:
Where and
We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
And the standard error would be:
1-(-18)= 19
sense the subtract and negative cancel out, look at it as a plus sign between 1 and 18 so 1+18=19