Answer:
Sorry i don't get this at all. what grade is this ?!!?!?!?
Step-by-step explanation:
Answer:
57.14
Step-by-step explanation:
8/14 =x/100
cross multiply
800= 14x
x=57.1428
Answer:

And using the probability mass function we got:





And adding the values we got:

The best answer would be:
D. 0.377
Step-by-step explanation:
Let X the random variable of interest, on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
For this case in order to pass he needs to answer at leat 6 questions and we can rewrite this:

And using the probability mass function we got:





And adding the values we got:

The best answer would be:
D. 0.377
There are two types of interest: Simple interest and compounding interest:
Simple interest: F = P(1+in)
Compounding interest: F = P(1+i)ⁿ
The compounding interest is always bigger than simple interest for a given amount of n time. The effective interest rate is
Effective interest rate = 1.5%/year * 1 yr/12 months = 0.125% per month
Since there are 12 months in 1 year, n= 12. Then i = 0.125/100 = 0.00125
Difference = Compounded Interest - Simple Interest
Difference = P(1+i)ⁿ - P(1+in) = 1000(1+0.00125)¹² - 1000(1+0.00125*12)
Difference = $0.104
You will only have $0.104 more money than the simple interest.
Using confidence interval concepts, it is found that the interval estimate is (0.274, 0.364), and it means that we are x% sure(considering the confidence level) that the proportion of all voters in the city that plan to vote for the Democratic candidate is between these two values.
<h3>What is a confidence interval?</h3>
It is given by the <u>sample proportion plus/minus the margin of error</u>, and a x% confidence interval means that we are x% sure the population proportion is in the interval.
134 of 420 randomly chosen likely voters indicated that they planned to vote for the Democratic candidate, hence:
p = 134/420 = 0.319
The margin of error for the statistic is 0.045, hence:
0.319 - 0.045 = 0.274
0.319 + 0.045 = 0.364
The interval estimate is (0.274, 0.364), and it means that we are x% sure(considering the confidence level) that the proportion of all voters in the city that plan to vote for the Democratic candidate is between these two values.
More can be learned about confidence interval concepts at brainly.com/question/25890103