Answer:


And the 68% confidence interval is given by (91.1186, 97.2814)
Step-by-step explanation:
For this case we know that mean time that visitors stay at a museum is given by:

The standard deviation is given by:
And the standard error is given by:
And we want to interval captures 68% of the means for random samples of 25 scores and for this case the critical value can be founded like this using the normal standard distribution or excel:

We can find the interval like this:

And replacing we got:


And the 68% confidence interval is given by (91.1186, 97.2814)
I am pretty sure it depends on what your numbers are
Answer:
(67879,96344)
Step-by-step explanation:
I took the test
The answer is 3 because if you were to round 2.9 the next whole up from that is 3
We can add the money he spent to the money he had left to find the total.
4.85 + 15.9 + 8.20 = 28.95
He started with 28.95