According to the described situation, it is found that:
1. 
, 
.
2. Since the interval does not include 32, hence you can reject the null hypothesis and there is enough evidence to conclude that the actual mean flight time of all balloons differ from the advertised 32 hours.
<h3>What are the hypothesis tested?</h3>
At the null hypothesis, it is tested if the mean flight time is of 32 minutes, that is:
At the alternative hypothesis, it is tested if it differs of 32 minutes, hence:
<h3>What is the decision?</h3>
The confidence interval is of (28.5, 31.4), that is, is does not include 32, hence you can reject the null hypothesis and there is enough evidence to conclude that the actual mean flight time of all balloons differ from the advertised 32 hours.
More can be learned about an hypothesis test at brainly.com/question/26454209
The square root of 14 rounded to the nearest hundredth without using the calculator can be done this way. Follow these steps:
<span>1. Guess
2. Divide
<span>3. Average
</span></span>
GUESS.
1. Make good guess. We'll just use 2
DIVIDE.
2. Divide 14 by our guess of 2 = 7.
AVERAGE.
3. Average 7 and 2: (7+2)/2 = 4.5
Here, we repeat step 2 using 7 as our new guess, 4.5
2. 14/4.5 = 3.1
3. (3.1 + 4.5)/2 = 3.8
<span>
2. 14/3.8 = 3.7
3. (3.7 + 3.3)/2 = 3.5
2. 14/3.5 = 4
3. (3.5 + 4)/2 = 3.75
2. 14/3.75 = 3.7
3. (3.75 + 3.7)/2 = 3.725
so on and so forth until the pattern remains in 3.7</span>
Answer:
It is 437.5
Step-by-step explanation:
The median refers to the value in the middle of a set of number or observation. If the set is uneven, the value is one of the numbers, if the number of observation is even, then is the average between the two numbers in the middle.
In this set, we know that on upper shelf the maximum number is 400 pages. So all the other books contain less pages than or equal amount of pages to the book with 400 pages.
On the lower shelf the books have at least 475 pages.
So we can express our sets in this way
Upper shelf (x ; 400)
Lower shelf (475 ; Y)
The median of the number of pages between this 2 shelves is the number between 400 and 475.
So it is 437.5
Answer:
42
Step-by-step explanation:
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