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hram777 [196]
3 years ago
13

I need help on this question

Mathematics
1 answer:
Paul [167]3 years ago
4 0
9P2 =72

= 9!/ (9-2)!
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The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp
beks73 [17]

Answer:

(5.4582 ; 6.8618)

Step-by-step explanation:

Given the data:

6 10 2 6 3 3 3 6 6 6 6 5 8 9 10 10 7 9 3 6 5 10 9 9 10 3 8 6 6 3 3 6 6 5 4 10 9 3 5 7 10 6 3 8 6 8 3 3 5 5

Sample mean, xbar = Σx / n

n = sample size = 50

ΣX = 308

xbar = 308 / 50 = 6.16

Using a Calculator :

The sample standard deviation, s = 2.469

Confidence interval = xbar ± margin of error

Margin of Error = Tcritical * s/sqrt(n)

Tcritical at 95% ; df = 50 - 1 = 49

Tcritical = 2.010

Hence,

Margin of Error= 2.010 * (2.469/sqrt(50)) = 0.7018

Lower boundary : (6.16 - 0.7018) = 5.4582

Upper boundary : (6.16 + 0.7018) = 6.8618

(5.4582 ; 6.8618)

4 0
3 years ago
Pleaseeeeee helpppppppp i will mark brainlest
OlgaM077 [116]

Answer:

b

Step-by-step explanation:

The sum of angles in a triangle is 180°. Therefore,

x - 11 + 48 + 90 = 180

x + 127 = 180

x = 53°

8 0
3 years ago
Read 2 more answers
A line passes through the points (-4,n) and (2,4n) and has the slope of 6. What’s the value of n?
Wittaler [7]

Not sure about this one sorry bud

4 0
3 years ago
Ten times the sum of half a number and 6 is 8.
asambeis [7]
The answer IS 8 itself .
4 0
3 years ago
PLEASE HELP!! ILL MARK BRAINLYEST!!!
wlad13 [49]

Answer:

b. lol.

Step-by-step explanation:

yeah I'm almost positive

4 0
3 years ago
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