In a bakery, there are 420 cakes. If 15% of the cakes are banana cakes then how many banana cakes are there in the bakery?
1 answer:
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Answer:
The slope is 1.
Step-by-step explanation:
Remember:
Let's plug in!
By the binomial theorem,
where
Then the coefficients of the terms in the expansion are, in order from
to
,
Answer:
With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error:
For this problem, we have that:
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is
We need a sample size of at least n, in which n is found M = 0.04.
With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.