The weight of an apple is 150g rounded to the nearest 5g
1 answer:
You might be interested in
Answer:
The set has 256 subsets
Step-by-step explanation:
The set is [a,b,c,d,e,f,h,i]
Number of subset can be calculated from the formula
where n is the number of element in the set
n=8
This implies that
Answer:
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 scores for the univerisity A, and we know that:
Let Y the scores for the univerisity B, and we know that:
We select a sample size of size n=2, and since the distirbution for X is normal then the distribution for the sample mean would be given by:
And for the univeristy B we select a sample of n=3
Since both sample means are normally distributed then the difference is also normal distributed with the following parameters:
And we want this probability:
And we can use the z score given by:
And if we replace we got :
And if we find the probability using the normla standard table or excel we got: