Answer:
a would be correct
Step-by-step explanation:
Obviously, Ali is correct. Khamis did a mistake, he forgot the negative sign of - 5, when he divided b. He should have let - 5b and divided it by - 5 like ali did.
Good Luck
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 withdrawals of a population, and for this case we know the following info
and
The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".
From the central limit theorem we know that the distribution for the sample mean is given by:
We can find the probability of interest like this:
And using a calculator, excel or the normal standard table we have that:
Answer:
I think it is 52 degrease
Step-by-step explanation:
Answer:
13 hours
Step-by-step If she needs 94$ for a bike and and gets 7$ an hour it will take 13 hours for her to get to 94$ she will also have left over cash..