A local restaurant advertises that the mode cost of their most popular meals is $8. If the costs of their most popular meals are
2 answers:
Answer: This kind of advertising is accurate.
Step-by-step explanation:
Since we have given that
Cost of their most popular meals are as follows:
As we have given that the mode cost of their most popular meals is $8.
As we know that "Mode" refers to the most occurring number that we can found in the data.
Here, we can see that $8 occurs 2 times , which is the most occurring cost among them.
Hence, Mode = $8.
So, This kind of advertising is accurate.
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Answer:
So the answer for this case would be n=107 rounded up to the nearest integer
Step-by-step explanation:
Information given
the sample mean
the sample deviation
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 =0.001 and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
We can use as estimator of the real population deviation the sample deviation for this case / The critical value for 99% of confidence interval is given by
, replacing into formula (b) we got:
So the answer for this case would be n=107 rounded up to the nearest integer