três amigos levaram figurinhas para trocar na escola.Fernando levou 10 mas em média foram levadas 11 figurinhas por pessoa quant
1 answer:
We are given
Number of person took cards =3
Average number of cards taken = 11 per person
so, we can find total number of cards
Total number of cards= (average number of cards)*(number of persons)
Total number of cards is
Fernando took 10
so,
Fernando card +other two cards =33
10 +other two cards =33
Other two cards =23..............Answer
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Answer:
So the answer for this case would be n=1337 rounded up to the nearest integer
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
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".
represent the sample mean for the sample
population mean (variable of interest)
represent the population standard deviation
n represent the sample size
Solution to the problem
The margin of error is given by this formula:
(a)
And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got , replacing into formula (b) we got:
So the answer for this case would be n=1337 rounded up to the nearest integer