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REY [17]
3 years ago
9

7. A travel website wants to gauge the perceived quality of a major airport. The maximum possible rating is 10, and the results

of a random sample of 50 travelers can be found in the Airport.xlsx file. Develop a 95% confidence interval estimate of the population mean rating for the airport based upon this data.
Mathematics
1 answer:
Airida [17]3 years ago
8 0

Answer:

The 95% confidence interval has Minimum = 6.053 and Maximum = 7.467

Step-by-step explanation:

Here we have

Data as

1 5 6 7 8 8 8 9 9 9 9 10 3 4 5 5 7 6 8 9 10 5 4 6 5 7 3 1 9 8 8 9 9 10 7 6 4 8 10 2 5 1 8 6 9 6 8 8 10 10

The sum is 338

∴ Mean, \bar x = 6.76, Standard Deviation, s = 2.55

Sample size, n = 50

For a 95% confidence interval, we have

CI=\bar{x}\pm z\frac{s}{\sqrt{n}}

Where z is;

z at 95% z = \pm1.96

Therefore, we have

95% confidence interval as Minimum = 6.053 to Maximum = 7.467.

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3 years ago
ABCD is a parallelogram. Segment AC = 4x + 10. Find the value of x and y.
valkas [14]

Answer:

The values of x and y in the diagonals of the parallelogram are x=0 and y=5

Step-by-step explanation:

Given that ABCD is a parallelogram

And segment AC=4x+10

From the figure we have the diagonals AC=3x+y and BD=2x+y

By the property of parallelogram the diagonals are congruent

∴ we can equate the diagonals AC=BD

That is 3x+y=2x+y

3x+y-(2x+y)=2x+y-(2x+y)

3x+y-2x-y=2x+y-2x-y

x+0=0 ( by adding the like terms )

∴ x=0

Given that segment AC=4x+10

Substitute x=0  we have AC=4(0)+10

=0+10

=10

∴ AC=10

Now (3x+y)+(2x+y)=10

5x+2y=10

Substitute x=0, 5(0)+2y=10

2y=10

y=\frac{10}{2}

∴ y=5

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5 0
4 years ago
Solve for 2x2- 7x + 16 = 20 and find the sum of the solutions
beks73 [17]
I actually got zero for this when I did this in phothomath
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2 years ago
How do you do this (the first one)? i've been sitting trying to do this for literally half an hour.
joja [24]
Spain = 140
Italy = 40
France = 60
U.S.A = 120
total = 18,000,000

Spain : 140/360 = 39%.....0.39(18,000,000) = 7,020,000
Italy : 40/360 = 11%....0.11(18,000,000) = 1,980,000
France : 60/360 = 17%....0.17(18,000,000) = 3,060,000
U.S.A : 120/360 = 33%...0.33(18,000,000) = 5,940,000



6 0
3 years ago
Drag the tiles to the correct boxes to complete the pairs.
Degger [83]

Answer:

1 = B

2 = A

3 = C

4 = D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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