Jennifer's allowance is $14. This is because half of 14 is 7. when her parents give her $7 she ends up with 14 dollars.
Answer:
y -10
x graph
Step-by-step explanation:
Answer:
$39.60
Step-by-step explanation:
34% of $60 is $20.40
$60 - $20.40 = $39.60
Using the <u>normal distribution and the central limit theorem</u>, it is found that there is a:
a) 0.281 = 28.1% probability that the sample mean is above 500.
b) 0.0003 = 0.03% probability that the sample mean is above 500.
In a normal distribution with mean and standard deviation , the z-score of a measure X is given by:
- It measures how many standard deviations the measure is from the mean.
- After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
- By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation .
In this problem:
- The mean is of 430, hence .
- The standard deviation is of 120, hence .
Item a:
The probability is the <u>p-value of Z when X = 500</u>, hence:
has a p-value of 0.719.
1 - 0.719 = 0.281
0.281 = 28.1% probability that the sample mean is above 500.
Item b:
Sample of 35, hence
Then:
By the Central Limit Theorem
has a p-value of 0.9997.
1 - 0.9997 = 0.0003
0.0003 = 0.03% probability that the sample mean is above 500.
To learn more about the <u>normal distribution and the central limit theorem</u>, you can take a look at brainly.com/question/24663213