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DIA [1.3K]
2 years ago
15

DOES ANYONE KNOW THE ANSWER ???? Please I can’t fail this test !

Mathematics
1 answer:
Lady bird [3.3K]2 years ago
8 0

Answer: Answer is C.

Step-by-step explanation: In the meantime. Don't forget that the mode is the number that you see 2 or 3 times in the numbers.

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(1 point) A recent report for a regional airline reported that the mean number of hours of flying time for its pilots is 56 hour
Ray Of Light [21]

Answer:

(53.812 ; 58.188) ; 156

Step-by-step explanation:

Given that :

Sample size (n) = 51

Mean (m) = 56

Standard deviation (σ) = 9.5

α = 90%

Using the relation :

Confidence interval = mean ± Error

Error = Zcritical * (standard deviation / sqrt (n))

Zcritical at 90% = 1.645

Error = 1.645 * (9.5 / sqrt(51))

Error = 1.645 * 1.3302660

Error = 2.1882877

Hence,

Confidence interval :

Lower boundary = 56 - 2.1882877 = 53.8117123

Upper boundary = 56 + 2.1882877 = 58.1882877

Confidence interval = (53.812 ; 58.188)

2.)

Margin of Error (ME) = 1.25

α = 90%

Sample size = ((Zcritical * σ) / ME)^2

Zcritical at 90% = 1.645

Sample size = ((1.645 * 9.5) / 1.25)^2

Sample size = (15.6275 / 1.25)^2

Sample size = 12.502^2 = 156.3000

Sample size = 156

3 0
3 years ago
6 and 15 *<br> Your answer
aliya0001 [1]

Answer:

can you please show more details about the question

6 0
3 years ago
6) Solve: 7 = x + 12 A) -19 B) -5 C) 4 D) 5
murzikaleks [220]

Answer: B) -5

Step-by-step explanation: all you do is subtract 12 from each side and you will get -5

7 0
3 years ago
Read 2 more answers
Evaluate the expression 5t + 2m for m = 7 and t = 2.
pantera1 [17]

Answer:

<h3>The answer is 24</h3>

Step-by-step explanation:

5t + 2m

m = 7 t = 2

Substitute the above values into the expression

That's

5(2) + 2(7)

10 + 14

24

Hope this helps you

5 0
3 years ago
Suppose his airplane flies in still air at a speed of 420 km/h. One day the wind is blowing strongly at 110 km/h towards the nor
riadik2000 [5.3K]
The answer will be 46,200 Hopes this helps. :)
3 0
3 years ago
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