Answer:
B. Hannah is likely to be incorrect because 9 is not contained in the interval.
Step-by-step explanation:
She construct a 99% confidence interval for the difference between means and gets the interval (0.4, 8.0).
This means that there is 99% confidence that the true difference between means is within this interval.
The left 1% corresponds to the tails of the distribution: there is 0.5% probability that the difference between means is below 0.4 and 0.5% probability that the difference between means is above 8.0.
As she claims that 9 hours is the true difference, we can say that there is less than 0.5% that she is correct. In others words, is likely to be incorrect.
Answer: 8:1
Step-by-step explanation:
480/60 = 8/1
The average speed is 37 minutes
25 + 45 + 40 = 110
_____
3)110. 36.6
9
20
18
2
5.1 would be the greater amount. look at the place next the whole number. notice that in 5.1 the # next to the whole # is 1. and in 5.01 the # next to the whole # is 0. so ask yourself which is greater: 1 or 0. 1 is greater so the answer would be 5.1
