Raymond wants to estimate the percentage of parents who use cloth diapers. He asks a randomly selected group of 200 parents whet
2 answers:
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Answer:
And we can find this probability with the normal standard distribution and we got:
Step-by-step explanation:
Let X the random variable that represent the variable of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
Using this formula we got:
And we can find this probability with the normal standard distribution and we got:
Answer:
$203.22
Step-by-step explanation:
Find out how much each pair of jeans cost:
Each pair of jeans cost $22.58.
Multiply the unit price by 9 to get the total price for 9 jeans:
Amanda should be paying $203.22 for 9 pairs of jeans.